I don't know very much about coding, but I would like to be able to make it so when I click one of the "test" buttons, the image moves. I would like it to be a variable, so that it is constantly checking the variable (I have no idea how to use variables), and at any given moment, when variable = number, it is in a specific position I have designated. And when I click test 1, that variable goes up by one, and when I click test 2, it goes down by one. And at any given variable from 0-10, there is a specific place the image should be for each number. And once the variable reaches 11, the variable will instantly reset to 0 as if in a loop. It can include HTML, CSS and Javascript, sorry if this is confusing I really am a noob at coding :(
This is all the code I have so far, it really isn't helpful but I thought I should add it anyway.
<img id="img01" src="https://cdn.shopify.com/s/files/1/0080/8372/products/tattly_triangle_yoko_sakao_ohama_00_1200x1200.png?v=1575322215" height="300">
<button id="test1" type="button">test 1</button>
<button id="test2" type="button">test 2</button>
Thank you for any help :)
Take a look at the code below. I hope this example will help you to undestand a block move principe.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>moved image</title>
</head>
<body>
<div class="wrapper">
<div>
<img class="image" src="" width="50" style="left: 200px;">
</div>
</div>
<button class="button" type="button" id="left-button" onclick="moveLeft()">Left</button>
<button class="button" type="button" id="right-button" onclick="moveRight()">Right</button>
<style>
.wrapper {
position: relative;
width: 500px;
min-height: 200px;
background-color: yellow;
}
.image {
position: absolute;
top: 40px;
width: 100px;
height: 70px;
background-color: blue;
}
</style>
<script>
'use strict'
const getNumber = function(str) {
return parseInt(str, 10);
}
const transformToString = function(num) {
return num + 'px';
}
const SHIFT = 10;
const MARGIN = 10;
const element = document.querySelector('.image');
const LEFT_MARGIN = getNumber(element.style.left) - SHIFT * MARGIN;
const RIGHT_MARGIN = getNumber(element.style.left) + SHIFT * MARGIN;
const moveLeft = function() {
if (getNumber(element.style.left) > LEFT_MARGIN) {
element.style.left = transformToString(getNumber(element.style.left) - SHIFT);
}
}
const moveRight = function() {
if (getNumber(element.style.left) < RIGHT_MARGIN) {
element.style.left = transformToString(getNumber(element.style.left) + SHIFT);
}
}
</script>
</body>
</html>
Related
this maybe a very stupid question, but is this possibe ?
well i have a sort of a slider on a html page.
this is what it shows up like now:
<p>Illustrator</p>
<div class="w3-light-grey w3-round-xlarge w3-small">
<div class="w3-container w3-center w3-round-xlarge w3-teal" style="width:75%">75%</div>
</div>
This shows up a bar,
well what want to achieve is if its possible to change that value 75% to my script data :
style="width:75%">
like i have a script, it retrieves values from my server:
var input = "10;11;15";
var arr = input.split(";");
document.getElementById("humid").innerHTML = (arr[0 ]);
this shows up my data just normal
<span id="humid">0</span>
what i want to do is something like this, but i don't know how:
I want this value from style="width:75%"> to be the humid value.
so if my humid value is 50% the width goes 50%
i did try this but no result
style="width:humid+%">
or style="width:(humid)+%">
i'm still learning,
regards
<!DOCTYPE html>
<html>
<title>TESt</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Roboto'>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<style>
html,body,h1,h2,h3,h4,h5,h6 {font-family: "Roboto", sans-serif}
</style>
<body class="w3-light-grey">
<p>Original</p>
<div class="w3-light-grey w3-round-xlarge w3-small">
<div class="w3-container w3-center w3-round-xlarge w3-teal" style="width:75%">75%</div>
</div>
<p>Media</p>
<div class="w3-light-grey w3-round-xlarge w3-small">
<div class="w3-container w3-center w3-round-xlarge w3-teal" style="#humid">0</div>
</body>
<script>
var input = "10;11;15";
var arr = input.split(";");
//alert(arr[1 ]);
document.getElementById("humid").innerHTML = (arr[0]);
document.getElementById("temp").innerHTML = (arr[1 ]);
document.getElementById("uv").innerHTML = (arr[2 ]);
</script>
</html>
Retrieve my input:
function readForestall() {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("ForestAll").innerHTML =
this.responseText;
}
};
xhttp.open("GET", "readFORESTALL", false);
xhttp.send();
}
setInterval(function() {
readForestall();
}, 5000);
If I understand your question right, you want to change the width of an element based on a variable you receive. In that case you can change the inline style with JavaScript. You just need to grab the element and set the style by assigning values to the properties of the element's style property.
If you want to change the width, you can use the following:
element.style.width = '50%'
It sets the width to 50%. You can also include a variable like this:
const width = 50
element.style.width = `${width}%`
I've created a snippet below where you can set the value by using an input and it updates both the width and the content of that div. You can click on the "Run code snippet button" and see the result in live.
const barLeft = document.querySelector('#bar-left');
const barRight = document.querySelector('#bar-right');
const input = document.querySelector('[name="width"]');
const error = document.querySelector('.error');
input.addEventListener('input', (e) => {
const widthLeft = Number(e.target.value);
const widthRight = 100 - widthLeft;
if (widthLeft < 0 || widthLeft > 100) {
error.textContent =
"We don't do that here. Width must be between 0 and 100.";
return;
}
error.textContent = '';
barLeft.textContent = `${widthLeft}%`;
barLeft.style.width = `${widthLeft}%`;
barRight.textContent = `${widthRight}%`;
barRight.style.width = `${widthRight}%`;
});
body {
font-family: sans-serif;
margin: 0;
text-align: center;
}
.outer {
display: flex;
margin-bottom: 2rem;
}
.inner {
background-color: lightcoral;
box-shadow: 0 -4px 0 rgba(0, 0, 0, 0.2) inset;
height: 100%;
padding: 1rem;
}
.inner--blue {
background-color: lightblue;
}
.controls {
margin-bottom: 1rem;
}
input {
font-family: inherit;
font-size: inherit;
padding: 0.5rem 1rem;
}
.error {
color: #d32f2f;
}
<div class="outer">
<div class="inner" id="bar-left" style="width: 75%">75%</div>
<div class="inner inner--blue" id="bar-right" style="width: 25%">25%</div>
</div>
<div class="controls">
<label for="width">First bar's width:</label>
<input type="number" name="width" id="width" min="5" max="95" value="75" />
</div>
<div class="error"></div>
Update: Updated your example below. Make sure you close your tags, and check out how to add ids to elements.
<body class="w3-light-grey">
<p>Media</p>
<div class="w3-light-grey w3-round-xlarge w3-small">
<div class="w3-container w3-center w3-round-xlarge w3-teal" id="humid">
0
</div>
</div>
div>
<script>
var input = '10;11;15';
var arr = input.split(';');
// update the content of the div with ID "humid"
document.getElementById('humid').textContent = arr[0];
// change the width of the div with ID "humid"
document.getElementById('humid').style.width = `${arr[0]}%`;
</script>
</body>
Tranq,
i am not exactly sure why you would want to call the width from an array and use DOM when you can simply use CSS to accomplish this with #media instead. correct me if i am wrong, but you're just trying to adjust the width based on values of the current width of the device? this seems like a whole lot of work for what is a simple solution.
use something like to set the appropriate widths depending on the screen widths:
#media only screen and (max-width: 600px) {
#humid { width: 75%; }
}
also, it is likely you're not passing your array properly and it is returning NULL(0). you can check this via a debugger and ensure it is being passed properly. FireFox has a Great built in debugger for this. use CMD/CTRL+SHIFT+K to open the debugger in FireFox.
P.S. you are not passing the array properly. you're setting it to change the 'innerHTML' which changes everything inside of the
document.getElementById("humid").innerHTML = (arr[0 ]);
if you change "(arr[0 ]);" to something like "string" it will replace the value 0 to "string".
Something hard to understand for me that, how can I set width and height for the random images when they displayed. Can anyone help me, please?
This is my code
function randomImage(){
var imagesArray = ['images/person1.jpg', 'images/person2.jpg', 'images/person3.jpg'];
var num = Math.floor(Math.random() * 3);
document.canvas.src = imagesArray[num];
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Display random image</title>
</head>
<body>
<input type="button" id="randomImage" onclick="randomImage()" value="Random">
<img src="" name="canvas" />
</body>
</html>
And I do not know how to set width and height so I did not write code for this yet, this code just display images random when I click button
Your help is my pleasure
To identify your image by name attribute, use getElementsByName or the newer querySelector and for setting width and height you can use style attribute:
document.getElementsByName("canvas")[0].src = imagesArray[num];
or
document.querySelector("img[name=canvas]").src = imagesArray[num];
and for width and height (you can also use querySelector here):
document.getElementsByName("canvas")[0].style.width = "100px";
document.getElementsByName("canvas")[0].style.height= "100px";
function randomImage(){
let imagesArray = ['images/person1.jpg', 'images/person2.jpg', 'images/person3.jpg'];
let num = Math.floor(Math.random() * 3);
let image = document.getElementsByName("canvas")[0];
image.src = imagesArray[num];
image.style.width = "100px";
image.style.height = "100px";
}
<input type="button" id="randomImage" onclick="randomImage()" value="Random">
<img src="" name="canvas" />
if you want a random value for width and height, use it instead of the 100 in my sample
You should create a class: "image"
and in CSS you should add:
.image{
width: 220px; // you put your value here
height: auto; // to considere the proportions of the image
}
I am notsure if this answers your question, but you can also choose other approach you can do as following:
<div class="wrapper">
<img>
</div>
where .wrapper has overflow set to hidden and img has width of 100% and height auto,
You could've used window.canvas here, but that's not advisable. To retrieve one element, document.querySelector is your friend.
randomImage();
document.addEventListener("click", evt => {
if (evt.target.nodeName === "BUTTON") {
randomImage();
}
});
function randomImage() {
const imagesArray = [
'https://picsum.photos/200/300',
'https://picsum.photos/300/400',
'https://picsum.photos/100/100'
];
const randomNumber = Math.floor(Math.random() * 3);
document.querySelector("img[name='canvas']").src = imagesArray[randomNumber];
}
button {
float: right;
position: fixed;
right: 30vw;
top: 1rem;
}
<img name="canvas" src="" />
<br><button>Another picture</button>
I want to create a card game using java script. Being a beginner at java script, I am finding great difficulty finding a suitable tutorial for what I am trying to do. When the 'start game' button is selected, I want the computer to produce a random card. I have tried many ways of doing this and have came to no avail. Here is my code.
<html>
<head>
<title> Christmas Assignment </title>
<link rel="stylesheet" type="text/css" href="xmasass_1.css">
<script type = "text/javascript">
function randomImg(){
var myimages= [];
myimages[1] = "cards/1.gif";
myimages[2] = "cards/2.gif";
myimages[3] = "cards/3.gif";
myimages[4] = "cards/4.gif";
myimages[5] = "cards/5.gif";
myimages[6] = "cards/6.gif";
myimages[7] = "cards/7.gif";
myimages[8] = "cards/8.gif";
myimages[9] = "cards/9.gif";
myimages[10] = "cards/10.gif";
myimages[11] = "cards/11.gif";
myimages[12] = "cards/12.gif";
myimages[13] = "cards/13.gif";
function oddTrivia(){
var randomImg = Math.floor(Math.random()*(oddtrivia.length));
document.getElementById('comp').InnerHTML=myimages[randomImg];
}
ar total = 0;
function randomImg(){
var x = Math.floor(Math.random()*13)+1;
document.getElementById('img1').src = 'die'+x+'.gif';
document.getElementById('img2').src = 'die'+y+'.gif';
document.getElementById('score').innerHTML = total;
}
var card1Image;
var card2Image;
var card3Image;
var card4Image;
var card5Image;
var card6Image;
function start(){
var button = document.getElementById("startButton");
button.addEventListener("click", pickCards, false);
card1Image = document.getElementById("1");
card2Image = document.getElementById("2");
card3Image = document.getElementById("3");
card4Image = document.getElementById("4");
card5Image = document.getElementById("5");
card6Image = document.getElementById("6");
}
function pickCards(){
setImage(card1Image);
setImage(card2Image);
setImage(card3Image);
setImage(card4Image);
setImage(card5Image);
setImage(card6Image);
}
function setImage(cardImg){
var cardValue = Math.floor(1 + Math.random() * 13);
cardImg.setAttribute("src", "C:Xmas Assignment/cards/" + cardValue + ".gif");
}
window.addEventListener("load", start, false);
</script>
</head>
<body>
<div id = "settings">
<img src = "settings_img.png" width = "60" height = "60">
</div>
<div id = "bodydiv">
<h1> Card Game</h1>
<div id = "computer">
<img src = " cards/back.gif">
</div>
<div id = "comp" > Computer </div>
<div id ="arrow">
<img src ="arrow2.png" width = "100" height="100">
</div>
<div id = "player">
<img src = " cards/back.gif">
</div>
<div id = "play"> Player </div>
<div id = "kittens">
<button id = "startButton" onclick ="randomImg" > Start Game </button>
<div id = "buttons_1">
<button id ="higher"> Higher
</button>
<button id = "equal"> Equal
</button>
<button id = "lower"> Lower
</button>
</div>
<button id = "draw"> Draw your Card
</button>
<div id = "resetscore"> Reset Score
</div>
</div>
<div id = "score">
</div>
</div>
</body>
</html>
body {
background:#66ccff;
}
h1 {
text-align:center;
}
#settings {
float:right;
margin-top:10px;
}
#bodydiv {
width: 800px;
height:600px;
margin-left:200px;
margin-top:40px;
margin-bottom:60px;
background:#ffccff;
border-radius: 10px;
}
#computer {
border-radius: 10px;
position: absolute;
left:35%;
top:27%;
}
#player {
border-radius: 10px;
position: absolute;
left:55%;
top:27%;
}
#start_game {
width :120px;
height: 55px;
margin-left: 350px;
margin-top:50px;
background:white;
border:1px solid black;
}
#buttons_1 {
text-align: center;
margin-top:20px;
}
#higher {
width:140px;
height:50px;
font-size: 15px;
border-radius:10px;
font-weight:bold;
}
#equal {
width:140px;
height:50px;
font-size: 15px;
border-radius:10px;
font-weight:bold;
}
#lower {
width:140px;
height:50px;
font-size: 15px;
border-radius:10px;
font-weight:bold;
}
#draw {
width:160px;
height:30px;
margin-left:325px;
margin-top: 30px;
border:1px solid black;
background:#FFFFCC;
}
#resetscore {
text-align: center;
margin-top: 40px;
}
#arrow {
margin-left:370px;
margin-top:-130px;
}
#comp {
margin-top:240px;
margin-left:265px;
}
#play{
margin-top:10px;
margin-left:540px;
}
You code is kind of hard to read.
You forgot to close the "{" of your main function.
You are declaring "randomImg" again in the body of the "randomImg" function(use a different name).
You wrote
ar total = 0;
I think you meant to write:
var total = 0;
oddtrivia in the function "OddTrivia" is not defined.
y in the inner randomImg function is not defined.
Having poked a little bit at the code, here is a few things:
Problem no 1: randomImg()
It's hard to know your intentions, but you should likely begin with removing the start of your first function randomImg(){.
Because 1) It does not have an end and 2) If it actually spans everything then this line window.addEventListener("load", start, false); will not load on startup (since it does not get executed until randomImg() gets executed, and by then the page has already loaded.)
Problem no 2: Cannot set property 'src' of null"
Now when the first problem is out of the way, you should see "Uncaught TypeError: Cannot set property 'src' of null" if you look in your console. Yes, USE YOUR CONSOLE. Click on the error to show what causes it. Here it is:
cardImg.setAttribute("src", "C:Xmas Assignment/cards/" + cardValue + ".gif");
This means that cardImg is null. We backtrack the first call of setImage() and find that the variable card1Image is passed in. So that must mean that card1Image also is null. You can check it yourself by adding a console.log('card1Image', card1Image); in your code. Or you add a breakpoint at that point. (Use the sources-tab in chrome dev tools, click at the line-numbering to add a break point. Refresh the page and it will stop at the break point. Now you can mouse-over variables to see their values.)
Let's look at where 'card1Image' is set.
card1Image = document.getElementById("1");
So why is this returning null? Do we even have a id="1" element in the html? That could be the reason. (It is.)
There are more problems, but I'll stop there, but when you have fixed this part AND have no errors please ask again. Always check your errors and if you ask a question here you should provide errors. And when you can also be more specific with your questions.
What might someone else have done differently?
When it comes to playing cards, why not an array of objects?
var cards = [
{ src : 'cards/1.gif', value: 1 },
{ src : 'cards/2.gif', value: 2 },
{ src : 'cards/3.gif', value: 3 },
{ src : 'cards/4.gif', value: 4 }
]; // (You can of course use code to generate it.)
// Then a function to put cards in the player's hand.
var playerHand = _.sample(cards, 2);
console.log(playerHand);
Here I assume lodash, a lightweight library for when you don't want to re-invent the wheel.
I am new person in Front End Development and i am facing one major problem is that i have 3 images placed on each others and now i want to move one image so the other image comes up and then it goes and third image comes up after some interval of time.
I want three images on same position in my site but only wants to see these three images one after one after some interval of time.
Please help how i can do this??
May i use marquee property or javascript???
Non-jQuery Option
If you don't want to go down the jquery route, you can try http://www.menucool.com/javascript-image-slider. The setup is just as easy, you just have to make sure that your images are in a div with id of slider and that div has the same dimensions as one of your images.
jQuery Option
The jQuery cycle plugin will help you achieve this. It requires jquery to work but it doesn't need much setting up to create a simple sliple slideshow.
Have a look at the 'super basic' demo:
$(document).ready(function() {
$('.slideshow').cycle({
fx: 'fade' // choose your transition type, ex: fade, scrollUp, shuffle, etc...
});
});
It has many options if you want something a bit fancier.
Here you go PURE JavaScript solution:
EDIT I have added image rotation... Check out live example (link below)
<script>
var current = 0;
var rotator_obj = null;
var images_array = new Array();
images_array[0] = "rotator_1";
images_array[1] = "rotator_2";
images_array[2] = "rotator_3";
var rotate_them = setInterval(function(){rotating()},4000);
function rotating(){
rotator_obj = document.getElementById(images_array[current]);
if(current != 0) {
var rotator_obj_pass = document.getElementById(images_array[current-1]);
rotator_obj_pass.style.left = "-320px";
}
else {
rotator_obj.style.left = "-320px";
}
var slideit = setInterval(function(){change_position(rotator_obj)},30);
current++;
if (current == images_array.length+1) {
var rotator_obj_passed = document.getElementById(images_array[current-2]);
rotator_obj_passed.style.left = "-320px";
current = 0;
rotating();
}
}
function change_position(rotator_obj, type) {
var intleft = parseInt(rotator_obj.style.left);
if (intleft != 0) {
rotator_obj.style.left = intleft + 32 + "px";
}
else if (intleft == 0) {
clearInterval(slideit);
}
}
</script>
<style>
#rotate_outer {
position: absolute;
top: 50%;
left: 50%;
width: 320px;
height: 240px;
margin-top: -120px;
margin-left: -160px;
overflow: hidden;
}
#rotate_outer img {
position: absolute;
top: 0px;
left: 0px;
}
</style>
<html>
<head>
</head>
<body onload="rotating();">
<div id="rotate_outer">
<img src="0.jpg" id="rotator_1" style="left: -320px;" />
<img src="1.jpg" id="rotator_2" style="left: -320px;" />
<img src="2.jpg" id="rotator_3" style="left: -320px;" />
</div>
</body>
</html>
And a working example:
http://simplestudio.rs/yard/rotate/rotate.html
If you aim for good transition and effect, I suggest an image slider called "jqFancyTransitions"
<html>
<head>
<script type="text/javascript">
window.onload = function(){
window.displayImgCount = 0;
function cycleImage(){
if (displayImgCount !== 0) {
document.getElementById("img" + displayImgCount).style.display = "none";
}
displayImgCount = displayImgCount === 3 ? 1 : displayImgCount + 1;
document.getElementById("img" + displayImgCount).style.display = "block";
setTimeout(cycleImage, 1000);
}
cycleImage();
}
</script>
</head>
<body>
<img id="img1" src="./img1.png" style="display: none">
<img id="img2" src="./img2.png" style="display: none">
<img id="img3" src="./img3.png" style="display: none">
</body>
</html>
Fiddle: http://jsfiddle.net/SReject/F7haV/
arrayImageSource= ["Image1","Image2","Image3"];
setInterval(cycle, 2000);
var count = 0;
function cycle()
{
image.src = arrayImageSource[count]
count = (count === 2) ? 0 : count + 1;
}
Maybe something like this?
I got a "Making Layers that Move" javascript sample code and modified the functions that move left and right, creating the following code (I commented the modified lines, so you can see how it was):
<html>
<head>
<title>JavaScript Radio Example</title>
<script language=javascript type="text/javascript">
//var x=10;
function moveRight( )
{
var layerElement = document.getElementById("layer2");
//x+=10;
//layerElement.style.left=x;
layerElement.style.left += 10;
}
function moveLeft( )
{
var layerElement = document.getElementById("layer2");
//x-=10;
//layerElement.style.left=x;
layerElement.style.left -= 10;
}
</script>
</head>
<body>
<style type="text/css">
#layer1 {
background-color: yellow;
position: absolute;
height:90px;
width:90px;
left:0px;
top:100px;
}
#layer2 {
background-color: red;
position: absolute;
height:90px;
width:90px;
left:10px;
top:100px;
}
</style>
<p id="layer1">This is layer 1</p>
<p id="layer2">This is layer 2</p>
<form action="" name="orderForm">
<input type="BUTTON" value="Move Left" onClick="moveLeft()" />
<input type="BUTTON" value="Move Right" onClick="moveRight()" />
</form>
</body>
</html>
Now, why isn't it working after the modification?
Try running this in a js debugger, e.g. Firebug. I get:
>>> var layerElement = document.getElementById("layer2")
>>> layerElement
<p id="layer2" style="left: 130px;">
>>> layerElement.style.left
"130px"
>>> layerElement.style.left -= 10
NaN
Notice that the value of layerElement.style.left is a string, "130px". No wonder when we try to subtract 10 from it, we get NaN.
The reason the old code works is that js apparently does some magic when you assign
layerElement.style.left = x
to convert x to a string with dimensional units.
Node's style properties are strings! Basically you're concating two strings (second variable will be cated to first one's) => "100px"+10 = "100px10"
You have to cast this property to integer and than you can do the math.
var step = 10;
function moveRight(){
var myNode = document.getElementById("layer2");
myNode.style.left = parseInt(myNode.style.left)+step;
}