Develop Reference

Detecting the collision of 2 divs with JavaScript

I'm making a simple Space Invaders Clone in Web and ran into an issue. The code works well so far with the exception of the collision system. I need to destroy an enemy every time that the player's bullet hits it. In order to make it, I'm grabbing the x and y coordinates of both the enemies' div and the bullet's div. The issue appears on the values comparison: apparently getBoundingClientRect() grabs the x and y coordinates from within the element excluding its real size. Hence, according to my code, only when the bullet is perfectly inside the enemy that things would trigger. Is there a better way of doing it? How so?
Thanks in advance.
const shoot = (x) => {
//Creates bullet
const main = document.getElementById("main");
const div_bullet = document.createElement("div");
//Appends child
main.appendChild(div_bullet);
//Sets position
div_bullet.style.top = "340px";
div_bullet.style.left = x + "px";
//Gives it a class
div_bullet.classList.add("div_bullet");
div_bullet.setAttribute("id", "bullet");
//Deletes bullet
setTimeout(() => {
div_bullet.remove();
}, 1000);
};
const load_game = () => {
//Adding movement to the spaceship
const space_ship = document.getElementById("space_ship");
let x = 375;
window.addEventListener("keydown", (e) => {
switch (e.key) {
case "ArrowLeft":
if (x <= 15) break;
x = x - 10;
space_ship.style.left = x + "px";
break;
case "ArrowRight":
if (x >= 725) break;
x = x + 10;
space_ship.style.left = x + "px";
break;
case "ArrowUp":
if (document.getElementsByClassName("div_bullet").length === 0)
shoot(x + 20);
break;
default:
break;
}
});
};
const collision_system = () => {
setInterval(() => {
//Checks if any enemy was hit
const e1 = document.getElementById("e1");
const e2 = document.getElementById("e2");
const e3 = document.getElementById("e3");
const e4 = document.getElementById("e4");
const e5 = document.getElementById("e5");
const enemies_position = [{
x: e1.getBoundingClientRect().x,
y: e1.getBoundingClientRect().y
},
{
x: e2.getBoundingClientRect().x,
y: e2.getBoundingClientRect().y
},
{
x: e3.getBoundingClientRect().x,
y: e3.getBoundingClientRect().y
},
{
x: e4.getBoundingClientRect().x,
y: e4.getBoundingClientRect().y
},
{
x: e5.getBoundingClientRect().x,
y: e5.getBoundingClientRect().y
},
];
if (document.getElementById("bullet")) {
const x_bullet = document
.getElementById("bullet")
.getBoundingClientRect().x;
const y_bullet = document
.getElementById("bullet")
.getBoundingClientRect().y;
console.log(
"X: " + enemies_position[0].x + "Y: " + enemies_position[0].y
);
console.log("X bullet: " + x_bullet + "Y bullet : " + y_bullet);
for (let i = 0; i < 5; i++) {
if (
enemies_position[i].x === x_bullet &&
enemies_position[i].y === y_bullet
)
alert("Shoot!");
}
}
}, 10);
};
document.addEventListener("DOMContentLoaded", () => {
load_game();
collision_system();
});
* {
padding: 0px;
margin: 0px;
}
body {
background-color: black;
width: 100%;
height: 100vh;
display: flex;
justify-content: center;
align-items: center;
}
.main {
width: 800px;
height: 500px;
border: 2px white solid;
border-radius: 10px;
}
#keyframes enemies_move {
from {
left: 80px;
}
to {
left: -80px;
}
}
.enemies {
margin-top: 20px;
position: fixed;
width: 800px;
height: 50px;
display: flex;
justify-content: space-evenly;
}
.enemies div {
position: relative;
width: 50px;
height: 50px;
background-color: orange;
animation: enemies_move 4s alternate infinite;
}
.barriers {
width: 800px;
height: 20px;
position: fixed;
top: 460px;
display: flex;
justify-content: space-evenly;
}
.barriers div {
width: 100px;
height: 20px;
background-color: white;
}
.space_ship {
width: 50px;
height: 50px;
border: 2px white solid;
position: relative;
top: 440px;
left: 375px;
}
#keyframes shoot_bullet {
from {
top: 340px;
}
to {
top: -50px;
}
}
.div_bullet {
left: 17px;
width: 15px;
height: 40px;
background-color: white;
position: relative;
animation: shoot_bullet 1s;
}
<div id="main" class="main">
<div class="enemies">
<div id="e1"></div>
<div id="e2"></div>
<div id="e3"></div>
<div id="e4"></div>
<div id="e5"></div>
</div>
<div class="barriers">
<div></div>
<div></div>
<div></div>
<div></div>
</div>
<div id="space_ship" class="space_ship"></div>
</div>

The problem in your code is that you are using only the x and y of the bullet and enemy to check for collisions. You need to use the width and height of both items to check if they collide.
The checks needed to see if two rects collide is
function rectCollision(rectA, rectB) {
return (
rectA.x < rectB.x + rectB.width &&
rectA.x + rectA.width > rectB.x &&
rectA.y < rectB.y + rectB.height &&
rectA.height + rectA.y > rectB.y
);
}
And using this in your code makes it work
const shoot = (x) => {
//Creates bullet
const main = document.getElementById("main");
const div_bullet = document.createElement("div");
//Appends child
main.appendChild(div_bullet);
//Sets position
div_bullet.style.top = "340px";
div_bullet.style.left = x + "px";
//Gives it a class
div_bullet.classList.add("div_bullet");
div_bullet.setAttribute("id", "bullet");
//Deletes bullet
setTimeout(() => {
div_bullet.remove();
}, 1000);
};
const load_game = () => {
//Adding movement to the spaceship
const space_ship = document.getElementById("space_ship");
let x = 375;
window.addEventListener("keydown", (e) => {
switch (e.key) {
case "ArrowLeft":
if (x <= 15) break;
x = x - 10;
space_ship.style.left = x + "px";
break;
case "ArrowRight":
if (x >= 725) break;
x = x + 10;
space_ship.style.left = x + "px";
break;
case "ArrowUp":
if (document.getElementsByClassName("div_bullet").length === 0)
shoot(x + 20);
break;
default:
break;
}
});
};
const collision_system = () => {
setInterval(() => {
//Checks if any enemy was hit
const e1 = document.getElementById("e1");
const e2 = document.getElementById("e2");
const e3 = document.getElementById("e3");
const e4 = document.getElementById("e4");
const e5 = document.getElementById("e5");
const enemies_position = [
e1.getBoundingClientRect(),
e2.getBoundingClientRect(),
e3.getBoundingClientRect(),
e4.getBoundingClientRect(),
e5.getBoundingClientRect(),
];
if (document.getElementById("bullet")) {
const bullet = document
.getElementById("bullet")
.getBoundingClientRect();
console.log(
"X: " + enemies_position[0].x + "Y: " + enemies_position[0].y
);
console.log("X bullet: " + bullet.x + "Y bullet : " + bullet.y);
for (let i = 0; i < 5; i++) {
if (
rectCollision(enemies_position[i], bullet)
)
alert("Shoot!");
}
}
}, 10);
};
function rectCollision(rectA, rectB) {
return (rectA.x < rectB.x + rectB.width &&
rectA.x + rectA.width > rectB.x &&
rectA.y < rectB.y + rectB.height &&
rectA.height + rectA.y > rectB.y)
}
document.addEventListener("DOMContentLoaded", () => {
load_game();
collision_system();
});
* {
padding: 0px;
margin: 0px;
}
body {
background-color: black;
width: 100%;
height: 100vh;
display: flex;
justify-content: center;
align-items: center;
}
.main {
width: 800px;
height: 500px;
border: 2px white solid;
border-radius: 10px;
}
#keyframes enemies_move {
from {
left: 80px;
}
to {
left: -80px;
}
}
.enemies {
margin-top: 20px;
position: fixed;
width: 800px;
height: 50px;
display: flex;
justify-content: space-evenly;
}
.enemies div {
position: relative;
width: 50px;
height: 50px;
background-color: orange;
animation: enemies_move 4s alternate infinite;
}
.barriers {
width: 800px;
height: 20px;
position: fixed;
top: 460px;
display: flex;
justify-content: space-evenly;
}
.barriers div {
width: 100px;
height: 20px;
background-color: white;
}
.space_ship {
width: 50px;
height: 50px;
border: 2px white solid;
position: relative;
top: 440px;
left: 375px;
}
#keyframes shoot_bullet {
from {
top: 340px;
}
to {
top: -50px;
}
}
.div_bullet {
left: 17px;
width: 15px;
height: 40px;
background-color: white;
position: relative;
animation: shoot_bullet 1s;
}
<div id="main" class="main">
<div class="enemies">
<div id="e1"></div>
<div id="e2"></div>
<div id="e3"></div>
<div id="e4"></div>
<div id="e5"></div>
</div>
<div class="barriers">
<div></div>
<div></div>
<div></div>
<div></div>
</div>
<div id="space_ship" class="space_ship"></div>
</div>

Detect collision (video game js)

I am building a video game where fireballs drop from the top screen. The spaceship, moved by controllers, must avoid those fireballs in order win. My issue is that I do not know how to detect when the spaceship collides into fireballs. However, I found this link: Detect if animated object touched another object in DOM. I analysed this code and it seems it only works for his issue particularly. Do you guys know how to do this?
Code for image spaceship and fireball:
<img src="Photo/fireball.png" id="fireball">
<img src="Photo/Spaceship1.png" id="icon-p">
Code for spaceship:
let rect = icon
let pos = {top: 1000, left: 570}
const keys = {}
window.addEventListener("keydown", function(e) {keys[e.keyCode] = true})
window.addEventListener("keyup", function(e) {keys[e.keyCode] = false})
const loop = function() {
if (keys[37] || keys[81]) {pos.left -= 10}
if (keys[39] || keys[68]) {pos.left += 10}
if (keys[38] || keys[90]) {pos.top -= 10}
if (keys[40] || keys[83]) {pos.top += 10}
var owidth = display.offsetWidth
var oheight = display.offsetHeight
var iwidth = rect.offsetWidth
var iheight = rect.offsetHeight
if (pos.left < 0) pos.left = -10
if (pos.top < 0) pos.top = -10
if (pos.left + iwidth >= owidth) pos.left = owidth-iwidth
if (pos.top + iheight >= oheight) pos.top= oheight-iheight
rect.setAttribute("data", owidth + ":" + oheight)
rect.style.left = pos.left + "px"; rect.style.top = pos.top + "px"}
let sens = setInterval(loop, 1000 / 60)
Code for fireball:
function fFireball(offset) {
return Math.floor(Math.random() * (window.innerWidth - offset))}
let fireballElement = document.querySelector("#fireball");
let fireball = {x: fFireball(fireballElement.offsetWidth), y: 0}
const fireLoop = function() {
fireball.y += 2
fireballElement.style.top = fireball.y + 'px'
if (fireball.y > window.innerHeight) {
fireball.x = fFireball(fireballElement.offsetWidth)
fireballElement.style.left = fireball.x + 'px'; fireball.y = 0}}
fireballElement.style.left = fireball.x + 'px'
let fireInterval = setInterval(fireLoop, 1000 / 100)
Thanks!

here I've integrated collision detection for your game. The most notable thing is in this function:
function checkCollision() {
var elem = document.getElementById("icon");
var elem2 = document.getElementById("fireball");
if ( detectOverlap(elem, elem2) && elem2.getAttribute('hit')=='false' ){
hits++; // detect hit and increase
elem2.setAttribute('hit', true); // set attribute to not have flooding
console.log( hits ); // console it just to see it
}
setTimeout( checkCollision, 20);
}
In lower window you can test demo that I've built for you without images but some random boxes as images :)
Good luck with game man, cool
//////////
"use strict"
//Stay on focus
function stayOnFocus() {
setTimeout(function() {
alert("Do not exit window or game progression will be lost!")
}, 1000)
}
let hits = 0
//"A" keypress plays Music
document.addEventListener('keydown', function(e) {
if (e.keyCode !== 173) {
//document.getElementById('audio').play()
}
})
//Input Validation
let icon = document.getElementById("icon")
let fireballElement = document.querySelector("#fireball")
var input = document.getElementById("input")
input.addEventListener("keydown", function(event) {
if (event.keyCode === 13) {
event.preventDefault();
document.getElementById("begin-timer").click()
}
})
//CountDown (3...2...1)
var count = 3
function countDown() {
function preventCountFast() {
document.getElementById("count").innerHTML = count
if (count > 0) {
count--
} else {
clearInterval(ncount);
document.getElementById("count").style.display = "none"
}
}
var ncount = setInterval(preventCountFast, 1000)
}
//Name displayed + space(switch between images) + parameter icon displayed
function Username(field) {
field = input.value
if (field == "") {
alert("Complete blanks");
return false
}
document.getElementById("askName").style.display = "none"
setTimeout(function() {
document.getElementById("name").innerHTML = "Player: " + field
icon.style.display = 'block';
fireballElement.style.display = "block"
const images = ["https://placehold.it/30x30", "https://placehold.it/90x90",
"https://placehold.it/120x40", "https://placehold.it/100x100"
]
document.body.onkeyup = function(e) {
if (e.keyCode === 32) {
hits++;
icon.src = images[hits % 5]
}
}
checkCollision();
}, 4000)
}
//Spaceship moves into space + prevent going out borders
let display = document.getElementById("body");
let rect = icon
let pos = {
top: 1000,
left: 570
}
const keys = {}
window.addEventListener("keydown", function(e) {
keys[e.keyCode] = true
})
window.addEventListener("keyup", function(e) {
keys[e.keyCode] = false
})
const loop = function() {
if (keys[37] || keys[81]) {
pos.left -= 10
}
if (keys[39] || keys[68]) {
pos.left += 10
}
if (keys[38] || keys[90]) {
pos.top -= 10
}
if (keys[40] || keys[83]) {
pos.top += 10
}
var owidth = display.offsetWidth
var oheight = display.offsetHeight
var iwidth = rect.offsetWidth
var iheight = rect.offsetHeight
if (pos.left < 0) pos.left = -10
if (pos.top < 0) pos.top = -10
if (pos.left + iwidth >= owidth) pos.left = owidth - iwidth
if (pos.top + iheight >= oheight) pos.top = oheight - iheight
rect.setAttribute("data", owidth + ":" + oheight)
rect.style.left = pos.left + "px";
rect.style.top = pos.top + "px"
}
let sens = setInterval(loop, 1000 / 60)
//Parameter Sensibility
let param = document.getElementById("parameters")
let b2 = document.getElementById("body2")
document.getElementById("general").addEventListener("click", function() {
param.style.display = "block";
b2.style.display = "none"
})
function validateSens() {
b2.style.display = "block";
param.style.display = "none";
clearInterval(sens)
let sensibilty = parseFloat(document.getElementById("sensibilty").value)
switch (sensibilty) {
case 1:
sens = setInterval(loop, 1000 / 40);
break;
case 2:
sens = setInterval(loop, 1000 / 60);
break;
case 3:
sens = setInterval(loop, 1000 / 80);
break;
default:
alert("Sorry, a bug occured")
}
}
//Fireball script
function fFireball(offset) {
return Math.floor(Math.random() * (window.innerWidth - offset))
}
let fireball = {
x: fFireball(fireballElement.offsetWidth),
y: 0
}
const fireLoop = function() {
fireball.y += 2;
fireballElement.style.top = fireball.y + 'px'
if (fireball.y > window.innerHeight) {
fireball.x = fFireball(fireballElement.offsetWidth)
fireballElement.style.left = fireball.x + 'px';
fireball.y = 0;
fireballElement.setAttribute('hit', false );
}
}
fireballElement.style.left = fireball.x + 'px'
let fireInterval = setInterval(fireLoop, 1000 / 100)
function checkCollision() {
var elem = document.getElementById("icon");
var elem2 = document.getElementById("fireball");
if (detectOverlap(elem, elem2) && elem2.getAttribute('hit')=='false' ){
hits++; // detect hit
elem2.setAttribute('hit', true);
aler("hi")
}
setTimeout( checkCollision, 20);
}
// detect fn
var detectOverlap = (function() {
function getPositions(elem) {
var pos = elem.getBoundingClientRect();
return [
[pos.left, pos.right],
[pos.top, pos.bottom]
];
}
function comparePositions(p1, p2) {
var r1, r2;
r1 = p1[0] < p2[0] ? p1 : p2;
r2 = p1[0] < p2[0] ? p2 : p1;
return r1[1] > r2[0] || r1[0] === r2[0];
}
return function(a, b) {
var pos1 = getPositions(a),
pos2 = getPositions(b);
return comparePositions(pos1[0], pos2[0]) && comparePositions(pos1[1], pos2[1]);
};
})();
body {
user-select: none;
margin: 0px;
height: 100vh;
padding: 0;
width: 100%;
background-image: url(Photo/bg.jpg);
background-repeat: no-repeat;
background-attachment: fixed;
animation: intro-fade 3s;
background-size: cover;
overflow: hidden;
}
#askName {
display: block;
z-index: 1;
margin-left: auto;
margin-top: 12%;
margin-right: auto;
width: 400px;
text-align: center;
background-color: #737373;
opacity: 0.8;
border-radius: 15px;
padding: 40px 50px 40px 50px;
}
#askName:hover {
opacity: 0.9
}
#askName>label {
text-align: center;
font-size: 150%;
font-weight: lighter;
text-align: center;
}
#askName>input {
display: block;
font-size: 100%;
margin: 30px auto 20px auto;
border: none;
border-radius: 10px;
padding: 10px 20px 10px 20px;
}
#askName>button {
background-color: #e6e6e6;
cursor: pointer;
padding: 10px 20px 10px 20px;
border: none;
border-radius: 10px;
}
#count {
margin-top: 13%;
animation: count-down 16s;
font-weight: lighter;
font-family: cursive;
text-align: center;
color: black;
font-size: 200px;
}
h6 {
margin-right: 20px;
padding-top: 5px;
font-weight: normal;
font-family: sans-serif;
margin-top: 0px;
color: white;
text-align: center;
font-size: 190%;
cursor: default;
}
h6:hover {
font-size: 210%
}
#icon {
position: absolute;
top: 0;
left: 0;
cursor: none;
width: 9%;
}
#general {
position: absolute;
cursor: pointer;
min-width: 4%;
top: 10px;
width: 4%;
right: 10px;
}
#general:hover {
transform: rotate(-100deg)
}
#parameters {
text-align: center;
display: none;
animation: intro-fade 3s;
height: auto;
border: none;
background-color: #d9d9d9;
color: black;
position: absolute;
padding: 0px 60px 20px 60px;
left: 50%;
width: auto;
min-width: 200px;
top: 50%;
transform: translate(-50%, -50%);
border-radius: 13px;
}
h3 {
color: black;
font-weight: normal;
font-size: 150%;
}
#sensibilty {
display: block;
margin-right: auto;
margin-left: auto;
}
#validateSens {
margin-top: 20px;
border: none;
padding: 10px;
border-radius: 5px;
cursor: pointer;
}
#keyframes intro-fade {
from {
opacity: 0
}
to {
opacity: 1
}
}
#keyframes count-down {
from {
transform: scale(0)
}
to {
transform: scale(1)
}
}
<body id="body" onload="stayOnFocus()">
<img src="https://placehold.it/350x350" id="general">
<section id="parameters">
<h3> Choose your sensibility </h3>
<input type="range" id="sensibilty" min="1" max="3" value="2">
<button id="validateSens" onclick="validateSens()"> Submit </button>
</section>
<main id="body2">
<form id="askName" title="Write your name"> <label> Enter your username: </label>
<input id="input" type="text" maxlength="10" autofocus>
<button type="button" onclick="countDown(); return Username()" id="begin-timer"> Submit </button>
</form>
<h6 id="name"></h6>
<h2 id="count"></h2>
<img src="https://placehold.it/50x52" id="fireball" style="display:none; width:3%; position:absolute; cursor:none">
<img src="https://placehold.it/80x40" id="icon" style="display:none">
</main>

Vue - Convert html audio player into component

I'm converting a player in html into a Vue component.
Half of the component is already created, only the time control slider is missing.
Here is the html player code (Lines with multiple tabs are already implemented in the Vue component):
var audioPlayer = document.querySelector('.green-audio-player');
var playPause = audioPlayer.querySelector('#playPause');
var playpauseBtn = audioPlayer.querySelector('.play-pause-btn');
var loading = audioPlayer.querySelector('.loading');
var progress = audioPlayer.querySelector('.progress');
var sliders = audioPlayer.querySelectorAll('.slider');
var player = audioPlayer.querySelector('audio');
var currentTime = audioPlayer.querySelector('.current-time');
var totalTime = audioPlayer.querySelector('.total-time');
var speaker = audioPlayer.querySelector('#speaker');
var draggableClasses = ['pin'];
var currentlyDragged = null;
window.addEventListener('mousedown', function(event) {
if(!isDraggable(event.target)) return false;
currentlyDragged = event.target;
let handleMethod = currentlyDragged.dataset.method;
this.addEventListener('mousemove', window[handleMethod], false);
window.addEventListener('mouseup', () => {
currentlyDragged = false;
window.removeEventListener('mousemove', window[handleMethod], false);
}, false);
});
playpauseBtn.addEventListener('click', togglePlay);
player.addEventListener('timeupdate', updateProgress);
player.addEventListener('loadedmetadata', () => {
totalTime.textContent = formatTime(player.duration);
});
player.addEventListener('canplay', makePlay);
player.addEventListener('ended', function(){
playPause.attributes.d.value = "M18 12L0 24V0";
player.currentTime = 0;
});
sliders.forEach(slider => {
let pin = slider.querySelector('.pin');
slider.addEventListener('click', window[pin.dataset.method]);
});
function isDraggable(el) {
let canDrag = false;
let classes = Array.from(el.classList);
draggableClasses.forEach(draggable => {
if(classes.indexOf(draggable) !== -1)
canDrag = true;
})
return canDrag;
}
function inRange(event) {
let rangeBox = getRangeBox(event);
let rect = rangeBox.getBoundingClientRect();
let direction = rangeBox.dataset.direction;
if(direction == 'horizontal') {
var min = rangeBox.offsetLeft;
var max = min + rangeBox.offsetWidth;
if(event.clientX < min || event.clientX > max) return false;
} else {
var min = rect.top;
var max = min + rangeBox.offsetHeight;
if(event.clientY < min || event.clientY > max) return false;
}
return true;
}
function updateProgress() {
var current = player.currentTime;
var percent = (current / player.duration) * 100;
progress.style.width = percent + '%';
currentTime.textContent = formatTime(current);
}
function getRangeBox(event) {
let rangeBox = event.target;
let el = currentlyDragged;
if(event.type == 'click' && isDraggable(event.target)) {
rangeBox = event.target.parentElement.parentElement;
}
if(event.type == 'mousemove') {
rangeBox = el.parentElement.parentElement;
}
return rangeBox;
}
function getCoefficient(event) {
let slider = getRangeBox(event);
let rect = slider.getBoundingClientRect();
let K = 0;
if(slider.dataset.direction == 'horizontal') {
let offsetX = event.clientX - slider.offsetLeft;
let width = slider.clientWidth;
K = offsetX / width;
} else if(slider.dataset.direction == 'vertical') {
let height = slider.clientHeight;
var offsetY = event.clientY - rect.top;
K = 1 - offsetY / height;
}
return K;
}
function rewind(event) {
if(inRange(event)) {
player.currentTime = player.duration * getCoefficient(event);
}
}
function formatTime(time) {
var min = Math.floor(time / 60);
var sec = Math.floor(time % 60);
return min + ':' + ((sec<10) ? ('0' + sec) : sec);
}
function togglePlay() {
if(player.paused) {
playPause.attributes.d.value = "M0 0h6v24H0zM12 0h6v24h-6z";
player.play();
} else {
playPause.attributes.d.value = "M18 12L0 24V0";
player.pause();
}
}
function makePlay() {
playpauseBtn.style.display = 'block';
loading.style.display = 'none';
}
.audio.green-audio-player {
width: 400px;
min-width: 300px;
height: 56px;
box-shadow: 0 4px 16px 0 rgba(0, 0, 0, 0.07);
display: flex;
justify-content: space-between;
align-items: center;
padding-left: 24px;
padding-right: 24px;
border-radius: 4px;
user-select: none;
-webkit-user-select: none;
background-color: #fff;
}
.audio.green-audio-player .play-pause-btn {
display: none;
cursor: pointer;
}
.audio.green-audio-player .spinner {
width: 18px;
height: 18px;
background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/355309/loading.png);
background-size: cover;
background-repeat: no-repeat;
animation: spin 0.4s linear infinite;
}
.audio.green-audio-player .slider {
flex-grow: 1;
background-color: #D8D8D8;
cursor: pointer;
position: relative;
}
.audio.green-audio-player .slider .progress {
background-color: #44BFA3;
border-radius: inherit;
position: absolute;
pointer-events: none;
}
.audio.green-audio-player .slider .progress .pin {
height: 16px;
width: 16px;
border-radius: 8px;
background-color: #44BFA3;
position: absolute;
pointer-events: all;
box-shadow: 0px 1px 1px 0px rgba(0, 0, 0, 0.32);
}
.audio.green-audio-player .controls {
font-family: 'Roboto', sans-serif;
font-size: 16px;
line-height: 18px;
color: #55606E;
display: flex;
flex-grow: 1;
justify-content: space-between;
align-items: center;
margin-left: 24px;
}
.audio.green-audio-player .controls .slider {
margin-left: 16px;
margin-right: 16px;
border-radius: 2px;
height: 4px;
}
.audio.green-audio-player .controls .slider .progress {
width: 0;
height: 100%;
}
.audio.green-audio-player .controls .slider .progress .pin {
right: -8px;
top: -6px;
}
.audio.green-audio-player .controls span {
cursor: default;
}
svg, img {
display: block;
}
#keyframes spin {
from {
transform: rotateZ(0);
}
to {
transform: rotateZ(1turn);
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div class="audio green-audio-player">
<div class="loading">
<div class="spinner"></div>
</div>
<div class="play-pause-btn">
<svg xmlns="http://www.w3.org/2000/svg" width="18" height="24" viewBox="0 0 18 24">
<path fill="#566574" fill-rule="evenodd" d="M18 12L0 24V0" class="play-pause-icon" id="playPause"/>
</svg>
</div>
<div class="controls">
<span class="current-time">0:00</span>
<div class="slider" data-direction="horizontal">
<div class="progress">
<div class="pin" id="progress-pin" data-method="rewind"></div>
</div>
</div>
<span class="total-time">0:00</span>
</div>
<audio>
<source src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/355309/Swing_Jazz_Drum.mp3" type="audio/mpeg">
</audio>
</div>
Html Codepen: https://codepen.io/caiokawasaki/pen/JwVwry
Here is the Vue component:
Vue.component('audio-player', {
props: ['message'],
data: () => ({
audio: undefined,
loaded: false,
playing: false,
currentTime: '00:00',
totalTime: '00:00',
percent: '0%',
draggableClasses: ['pin'],
currentlyDragged: null
}),
computed: {},
methods: {
formatTime(time) {
var min = Math.floor(time / 60);
var sec = Math.floor(time % 60);
return min + ':' + ((sec < 10) ? ('0' + sec) : sec);
},
loadedMetaData() {
this.totalTime = this.formatTime(this.audio.duration)
},
canPlay() {
this.loaded = true
},
timeUpdate(){
var current = this.audio.currentTime;
var percent = (current / this.audio.duration) * 100;
this.percent = percent + '%';
this.currentTime = this.formatTime(current);
},
ended(){
this.playing = false
this.audio.currentTime = 0
},
isDraggable(el) {
let canDrag = false;
let classes = Array.from(el.classList);
this.draggableClasses.forEach(draggable => {
if (classes.indexOf(draggable) !== -1)
canDrag = true;
})
return canDrag;
},
inRange(event) {
let rangeBox = getRangeBox(event);
let rect = rangeBox.getBoundingClientRect();
let direction = rangeBox.dataset.direction;
if (direction == 'horizontal') {
var min = rangeBox.offsetLeft;
var max = min + rangeBox.offsetWidth;
if (event.clientX < min || event.clientX > max) return false;
} else {
var min = rect.top;
var max = min + rangeBox.offsetHeight;
if (event.clientY < min || event.clientY > max) return false;
}
return true;
},
togglePlay() {
if (this.audio.paused) {
this.audio.play();
this.playing = true;
} else {
this.audio.pause();
this.playing = false;
}
},
makePlay() {
playpauseBtn.style.display = 'block';
loading.style.display = 'none';
},
getRangeBox(event) {
let rangeBox = event.target;
let el = currentlyDragged;
if (event.type == 'click' && isDraggable(event.target)) {
rangeBox = event.target.parentElement.parentElement;
}
if (event.type == 'mousemove') {
rangeBox = el.parentElement.parentElement;
}
return rangeBox;
},
getCoefficient(event) {
let slider = getRangeBox(event);
let rect = slider.getBoundingClientRect();
let K = 0;
if (slider.dataset.direction == 'horizontal') {
let offsetX = event.clientX - slider.offsetLeft;
let width = slider.clientWidth;
K = offsetX / width;
} else if (slider.dataset.direction == 'vertical') {
let height = slider.clientHeight;
var offsetY = event.clientY - rect.top;
K = 1 - offsetY / height;
}
return K;
},
rewind(event) {
if (this.inRange(event)) {
this.audio.currentTime = this.audio.duration * getCoefficient(event);
}
}
},
mounted() {
this.audio = this.$refs.audio
},
template: `<div class="audio-message-content">
<a v-if="loaded" class="play-pause-btn" href="#" :title="playing ? 'Clique aqui para pausar o audio' : 'Clique aqui ouvir o audio'" #click.prevent="togglePlay">
<svg key="pause" v-if="playing" x="0px" y="0px" viewBox="0 0 18 20" style="width: 18px; height: 20px; margin-top: -10px">
<path d="M17.1,20c0.49,0,0.9-0.43,0.9-0.96V0.96C18,0.43,17.6,0,17.1,0h-5.39c-0.49,0-0.9,0.43-0.9,0.96v18.07c0,0.53,0.4,0.96,0.9,0.96H17.1z M17.1,20"/>
<path d="M6.29,20c0.49,0,0.9-0.43,0.9-0.96V0.96C7.19,0.43,6.78,0,6.29,0H0.9C0.4,0,0,0.43,0,0.96v18.07C0,19.57,0.4,20,0.9,20H6.29z M6.29,20"/>
</svg>
<svg key="play" v-else x="0px" y="0px" viewBox="0 0 18 22" style="width: 18px; height: 22px; margin-top: -11px">
<path d="M17.45,10.01L1.61,0.14c-0.65-0.4-1.46,0.11-1.46,0.91V20.8c0,0.81,0.81,1.32,1.46,0.91l15.84-9.87C18.1,11.43,18.1,10.41,17.45,10.01L17.45,10.01z M17.45,10.01"/>
</svg>
</a>
<div v-else class="loading">
<div class="spinner"></div>
</div>
<div class="controls">
<span class="current-time">{{ currentTime }}</span>
<div class="slider" data-direction="horizontal" #click="">
<div class="progress" :style="{width: percent}">
<div class="pin" id="progress-pin" data-method="rewind"></div>
</div>
</div>
<span class="total-time">{{ totalTime }}</span>
</div>
<audio ref="audio" src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/355309/Swing_Jazz_Drum.mp3" #loadedmetadata="loadedMetaData" #canplay="canPlay" #timeupdate="timeUpdate" #ended="ended"></audio>
</div>`
})
var app = new Vue({
el: '#app'
})
.audio-message-content {
width: 400px;
min-width: 300px;
height: 56px;
box-shadow: 0 4px 16px 0 rgba(0, 0, 0, 0.07);
display: flex;
justify-content: space-between;
align-items: center;
padding-left: 24px;
padding-right: 24px;
border-radius: 4px;
user-select: none;
-webkit-user-select: none;
background-color: #fff;
}
.audio-message-content .play-pause-btn {
position: relative;
width: 18px;
height: 22px;
cursor: pointer;
}
.audio-message-content .play-pause-btn svg {
display: block;
position: absolute;
top: 50%;
left: 50%;
margin-left: -9px;
}
.audio-message-content .spinner {
width: 18px;
height: 18px;
background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/355309/loading.png);
background-size: cover;
background-repeat: no-repeat;
animation: spin 0.4s linear infinite;
}
.audio-message-content .slider {
flex-grow: 1;
background-color: #D8D8D8;
cursor: pointer;
position: relative;
}
.audio-message-content .slider .progress {
background-color: #44BFA3;
border-radius: inherit;
position: absolute;
pointer-events: none;
}
.audio-message-content .slider .progress .pin {
height: 16px;
width: 16px;
border-radius: 8px;
background-color: #44BFA3;
position: absolute;
pointer-events: all;
box-shadow: 0px 1px 1px 0px rgba(0, 0, 0, 0.32);
}
.audio-message-content .controls {
font-family: 'Roboto', sans-serif;
font-size: 16px;
line-height: 18px;
color: #55606E;
display: flex;
flex-grow: 1;
justify-content: space-between;
align-items: center;
margin-left: 24px;
}
.audio-message-content .controls .slider {
margin-left: 16px;
margin-right: 16px;
border-radius: 2px;
height: 4px;
}
.audio-message-content .controls .slider .progress {
width: 0;
height: 100%;
}
.audio-message-content .controls .slider .progress .pin {
right: -8px;
top: -6px;
}
.audio-message-content .controls span {
cursor: default;
}
svg, img {
display: block;
}
#keyframes spin {
from {
transform: rotateZ(0);
}
to {
transform: rotateZ(1turn);
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<audio-player></audio-player>
</div>
Vue Component Codepen: https://codepen.io/caiokawasaki/pen/QzRMwz
Functions like the following I could not understand nor find anything on the internet:
window[handleMethod]
window[pin.dataset.method]
Can anyone help me finalize this component?
Edit
I've converted all of the html and javascript into a Vue component but anyway it still is not working properly.
The only thing that is not working properly is the progress bar. It needs to perform two functions:
Clicking it should go to the desired time.
When clicking on the pin and drag it should go to the desired time.
I use Vue Cli, neither of the above two work in the form of .vue files, but in Codepen normally written only function 2 works.
Codepen: https://codepen.io/caiokawasaki/pen/VqOqBQ

The function: window[handleMethod] is executed by deriving the name of the method off of the data- property from the pin element:
<div class="pin" id="progress-pin" data-method="rewind"></div>
So window[handleMethod] is equivalent to window.rewind()
The same is true for window[pin.dataset.method].
So in your case:
this[handleMethod](event)
and:
this[pin.dataset.method](event)
Should be suitable replacements.

JavaScript slideshow isn't working as intended

I made this little Slideshow with HTML/CSS/JS. Most of it is working but there is one thing which I can't figure out. How do I make it so the text above each image fits the img itself when autosliding is on? Right now it only shows the right title for each img when i manually click through. Any help is appreciated. Many thanks in advance.
var uniqueRandoms = [];
var indexCount = 0;
var allImagesAndText = ["Seltene römische Goldmünze", "Römische Funde", "Römische Wandmalerei", "Tutanchamun", "Cheops Pyramide", "Ägyptische Malerei"];
var total = allImagesAndText.length - 1;
function makeUniqueRandom() {
if (!uniqueRandoms.length) {
for (var i = indexCount; i <= total; i++) {
uniqueRandoms.push(i);
}
}
var index = Math.floor(Math.random() * uniqueRandoms.length);
var val = uniqueRandoms[index];
uniqueRandoms.splice(index, 1);
return val;
}
function slide(x) {
if(indexCount + x >= 0 && indexCount + x <= total) {
clearInterval(sliderInterval);
indexCount += x;
var Image = document.getElementById('img');
Image.src = "images/img" + indexCount + ".jpg";
update_dom();
sliderInterval = window.setInterval( slideA, 3000);
}
}
function update_dom() {
var left_holder = document.getElementById('left_holder');
var right_holder = document.getElementById('right_holder');
ChangeText(indexCount);
if(indexCount == 0) {
left_holder.style.display = "none";
} else if (indexCount == total) {
right_holder.style.display = "none";
} else {
right_holder.style.display = "block";
left_holder.style.display = "block";
}
}
function slideA() {
var Image = document.getElementById('img');
imagescount = makeUniqueRandom();
Image.src = "images/img" + imagescount + ".jpg";
update_dom();
}
function ChangeText(imgNum) {
document.getElementById("text1").innerHTML = allImagesAndText[imgNum];
}
window.addEventListener("load", function() {
update_dom();
sliderInterval = window.setInterval( slideA, 3000);
document.getElementById("right").addEventListener("click", function() {
slide(1);
});
document.getElementById("left").addEventListener("click", function() {
slide(-1);
});
});
#slideshow {
height: 450px;
width: 650px;
margin: 20px auto;
position: relative;
z-index: 1;
border: 10px solid #000;
border-radius: 10px;
}
#img {
height: 450px;
width: 650px;
}
#left_holder {
height: 450px;
width: 100px;
position: absolute;
left: 0px;
top: 0px;
}
#right_holder {
height: 450px;
width: 100px;
position: absolute;
right: 0px;
top: 0px;
}
.left {
height: 50px;
width: 50px;
position: absolute;
top: 40%;
left: 0px;
}
.right {
height: 50px;
width: 50px;
position: absolute;
top: 40%;
right: 0px;
}
#text1 {
position: absolute;
color: #fff;
font-size: 32px;
background-color: #000;
opacity: 0.5;
left: 37%;
z-index: 2;
}
<div id="slideshow">
<div id="text1">Text</div>
<img src="images/img0.jpg" />
<div id="left_holder">
<img id="left" class="left" src="images/arrow_left.png" />
</div>
<div id="right_holder">
<img id="right" class="right" src="images/arrow_right.png" />
</div>
</div>

jQuery Countdown Timer is not displaying in browser

Have create a countdown timer by using jQuery. Hence, the countdown timer will only be activated after the user has navigated from the previous page to the current page. Therefore, in the current page, the blocks that are to be displayed will be
1.) Countdown Timer
2.) Scroll roller
Issue:
the Scroll roller is able to be displayed, however not the countdown Timer. What have I done wrong.
Code:
var count = 5;
function updateTimer() {
if (count > 0) {
$("#content").fadeOut('slow', function() {
$("#content").text(count);
$("#content").fadeIn();
count--;
});
} else if (count == 0) {
$("#content").fadeOut('slow', function() {
$("#content").text("Start!");
$("#content").fadeIn();
count--;
/*To display the canvas and countDown() function in 2 sec interval
after the fadein countdown is completed
*/
setTimeout(function() {
//canvasFunction();
//TEST: Countdown Gauge
(function($) {
var settings;
var timer;
var circleSeconds;
var layerSeconds;
var element;
var callbackFunction;
$.fn.final_countdown = function(options, callback) {
element = $(this);
// Element is not visibile
if (!element.is(':visible')) {
return;
}
var defaults = $.extend({
start: undefined,
end: undefined,
now: undefined,
selectors: {
value_seconds: '.clock-seconds .val',
canvas_seconds: 'canvas-seconds'
},
seconds: {
borderColor: '#654321',
borderWidth: '6'
},
}, options);
settings = $.extend({}, defaults, options);
if (settings.start === undefined) {
settings.start = element.data('start');
}
if (settings.end === undefined) {
settings.end = element.data('end');
}
if (settings.now === undefined) {
settings.now = element.data('now');
}
if (element.data('border-color')) {
settings.seconds.borderColor = element.data('border-color');
}
if (settings.now < settings.start) {
settings.start = settings.now;
settings.end = settings.now;
}
if (settings.now > settings.end) {
settings.start = settings.now;
settings.end = settings.now;
}
if (typeof callback == 'function') { // make sure the callback is a function
callbackFunction = callback;
}
responsive();
dispatchTimer();
prepareCounters();
startCounters();
};
function responsive() {
$(window).load(updateCircles);
$(window).on('redraw', function() {
switched = false;
updateCircles();
});
$(window).on('resize', updateCircles);
}
function updateCircles() {
layerSeconds.draw();
}
function convertToDeg(degree) {
return (Math.PI / 180) * degree - (Math.PI / 180) * 90
}
function dispatchTimer() {
timer = {
total: Math.floor((settings.end - settings.start) / 86400),
seconds: 60 - Math.floor((((settings.end - settings.now) % 86400) % 3600) % 60)
}
}
function prepareCounters() {
// Seconds
var seconds_width = $('#' + settings.selectors.canvas_seconds).width()
var secondsStage = new Kinetic.Stage({
container: settings.selectors.canvas_seconds,
width: seconds_width,
height: seconds_width
});
circleSeconds = new Kinetic.Shape({
drawFunc: function(context) {
var seconds_width = $('#' + settings.selectors.canvas_seconds).width()
var radius = seconds_width / 2 - settings.seconds.borderWidth / 2;
var x = seconds_width / 2;
var y = seconds_width / 2;
context.beginPath();
context.arc(x, y, radius, convertToDeg(0), convertToDeg(timer.seconds * 6));
context.fillStrokeShape(this);
$(settings.selectors.value_seconds).html(10 - timer.seconds);
},
stroke: settings.seconds.borderColor,
strokeWidth: settings.seconds.borderWidth
});
layerSeconds = new Kinetic.Layer();
layerSeconds.add(circleSeconds);
secondsStage.add(layerSeconds);
}
function startCounters() {
//var timer.seconds = 10;
var interval = setInterval(function() {
if (timer.seconds > 11) {
if (10 - timer.minutes == 0) {
clearInterval(interval);
if (callbackFunction !== undefined) {
callbackFunction.call(this); // brings the scope to the callback
}
return;
}
timer.seconds = 0;
} else {
timer.seconds++;
}
layerSeconds.draw();
}, 1000);
}
})(jQuery);
//TEST
$("#UserInteraction").show();
//countDown();
}, 2000)
});
$("#content").fadeOut();
} else {
$("#content").fadeOut();
clearInterval(interval);
}
}
setInterval(function() {
updateTimer()
}, 2000);
.countdown-container {
position: relative;
top: 50%;
-webkit-transform: translateY(-50%);
-moz-transform: translateY(-50%);
transform: translateY(-50%);
}
.clock-item .inner {
height: 0px;
padding-bottom: 100%;
position: relative;
width: 100%;
}
.clock-canvas {
background-color: rgba(255, 255, 255, .1);
border-radius: 50%;
height: 0px;
padding-bottom: 100%;
}
.text {
color: #fff;
font-size: 30px;
font-weight: bold;
margin-top: -50px;
position: absolute;
top: 50%;
text-align: center;
text-shadow: 1px 1px 1px rgba(0, 0, 0, 1);
width: 100%;
}
.text .val {
font-size: 50px;
}
.text .type-time {
font-size: 20px;
}
#media (min-width: 768px) and (max-width: 991px) {
.clock-item {
margin-bottom: 30px;
}
}
#media (max-width: 767px) {
.clock-item {
margin: 0px 30px 30px 30px;
}
}
<div id="page2" class="img-wrapper" align="center" style=" position: relative; background-image: url(Image/Page2.png); background-repeat: no-repeat; width: 100%;height: 100%;">
<div id='content'></div>
<!-- <canvas id="canvas" width="300" height="300">
</canvas>
<canvas id="Counter" width="300" height="300">
</canvas>-->
<div id="scroller">
<p id="scrollTopId"></p>
</div>
<div id="UserInteraction" style="display:none" z-index="2">
<img id="roller" style="position: relative; top:1100px; width: 100%" src="image/rolling_pin/Rolling_Pin_Spin000.png" />
<img id="scroll" style="position:absolute; top: 1250px; left: 380px; overflow-y: auto;" src="image/Scroll.png">
</div>
</div>

You have display:none on the root div page2:
<div id="page2" class="img-wrapper" align="center" style=" position: relative; background-image: url(Image/Page2.png); background-repeat: no-repeat; display: none; width: 100%;height: 100%;">
Remove display:none or set it to display:block
https://jsfiddle.net/kebw53ue/1/