How to pause setInterval when mouse hover? - javascript

How to pause setInterval when mouse hover ?
$(document).ready(function() {
var MyClass = $(".myclass");
if (MyClass.hover()) {
} else {
setInterval(test, 1000);
function test() {
$("#color").click();
}
}
});
This code not work!
All code in Fiddle link

Try this:
$(document).ready(function() {
var myClass = $(".myclass");
function test() {
$("#color").click();
}
var timerId = setInterval(test, 1000);
myClass.hover(
function() {
window.clearInterval(timerId);
}, function() {
timerId = setInterval(test, 1000);
}
);
});
document.getElementById('color').onclick = changeColor;
var currentColor = "red";
function changeColor() {
if(currentColor == "red"){
document.body.style.color = "green";
currentColor = "green";
} else {
document.body.style.color = "red";
currentColor = "red";
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.0/jquery.min.js"></script>
<button id="color">
click
</button>
<div class="myclass">
Mouse Hover
</div>
<div id="myid" style="width:30px;height:30px;">
Change color
</div>

Related

How to make a click on the button change its color in Javascript

I am making a small game where in I have 50 buttons and when I click on any one of the button, its color changes and amongst them, I have one button which is blue in color. If the player clicks on that blue button, he is a winner. He will be given only three chances. I have used a button eventhandler that takes the color id and accordingly changes the color. But the colorId from the count is 51 and not amongst the 1 - 50 buttons. What is wrong?
<html>
<head>
<title>Blue-Box</title>
</head>
<body>
<script>
var colorId;
var button;
var noOfTries = 3;
function createButtons() {
colorId = 0;
for (var index = 0; index <= 50; index++) {
button = document.createElement("button");
button.innerHTML = "box " + index;
button.id = colorId;
button.setAttribute("value", colorId);
button.setAttribute("text", colorId);
button.style.fontFamily = "Times New Roman";
button.style.backgroundColor = "#C0C0C0";
button.style.fontSize = "15px";
document.body.appendChild(button);
colorId++;
button.addEventListener("click", selectColor);
}
}
function selectColor() {
console.log((colorId));
console.log("button click");
if (noOfTries > 0) {
noOfTries = noOfTries - 1;
if ((colorId) <= 24) {
console.log("red color")
document.getElementById(colorId).style.backgroundColor = "#BC8F8F";
}
else if (colorId == 25) {
console.log("blue color")
document.getElementById(colorId).style.backgroundColor = "#0099CC";
document.write("You Won the game");
noOfTries = 3;
}
else if (colorId > 25 && colorId < 51) {
document.getElementById(colorId).style.backgroundColor = "#008080";
}
}
else {
document.write("Your attempts have finished");
}
}
</script>
<div id="divbox">
<button id="buttonbox" onclick="createButtons()">Click to start the Game</button>
</div>
</body>
</html>
Hope this helps you.
<html>
<head>
<title>Blue-Box</title>
</head>
<body>
<script>
var colorId = 1;
var button;
var lives = 0;
function createButtons(){
colorId=0;
for(var index=1;index<=50;index++){
button=document.createElement("button");
button.innerHTML="box "+index;
button.id=colorId;
button.setAttribute("value",colorId);
button.setAttribute("text",colorId);
button.style.fontFamily="Times New Roman";
button.style.backgroundColor="#C0C0C0";
button.style.fontSize="15px";
button.addEventListener("click", function(){
selectColor(this.id);
})
document.getElementById("btnbox").appendChild(button);
colorId++;
}
}
function selectColor(colorId){
lives++;
if(lives < 4){
if (colorId<=24){
document.getElementById(colorId).style.backgroundColor="#BC8F8F";
}
else if (colorId==25){
document.getElementById(colorId).style.backgroundColor="#0099CC";
alert("Winner");
location.reload();
}
else{
document.getElementById(colorId).style.backgroundColor="limegreen";
}
}
else if(lives == 4){
alert("Game over!");
location.reload();
}
}
</script>
<div id="divbox">
<button id="buttonbox" onclick="createButtons()">Click to start the Game</button>
</div>
<div id="btnbox">
</div>
</body>
// first add a global variable
var noOfTries = 3;
function selectColor() {
// check if greater than 3
if(noOfTries > 0) {
// if yes, then decrement
noOfTries = noOfTries - 1;
// continue with the color change
if (colorId<=24) {
document.getElementById(colorId).style.backgroundColor="#BC8F8F";
}
else if (colorId==25) {
document.getElementById(colorId).style.backgroundColor="#0099CC";
}
else {
document.getElementById(colorId).style.backgroundColor="limegreen";
}
}
}
Use:
button.addEventListner("click",function() {
button.style.backgroundColor=nextColor;
})

JavasScript infinitive background change with function

I'm curious if there is a way to repeat a function for as long as user stays on the page. I want function f1() to repeat changing the color of div #gallery. It's probably an infinitive loop or something, please help me.
function f1() {
setTimeout(
function() {
document.getElementById("gallery").style.backgroundColor = "blue";
}, 3000);
setTimeout(
function() {
document.getElementById("gallery").style.backgroundColor = "red";
}, 6000);
}
#gallery {
width: 500px;
height: 300px;
background-color: red;
}
<body onload="f1()">
<div id="gallery">
</div>
</body>
The previous method of using setInterval is really great, but I personally like to have a little bit more control over what happens so I use something like this for repetition:
fiddle
The 'meat and bones' is a loop like this:
const target = document.getElementById('target');
const colors = ["red", "blue", "purple", "black", "gray", "aliceblue"];
const randomColor = () => {
const randomInt = Math.floor(Math.random() * colors.length + 1);
return colors[randomInt];
}
const userStillOnPage = true;
function f1(newInterval, continueWith) {
target.style.background = randomColor();
if (userStillOnPage) {
setTimeout(continueWith || f1, newInterval || 1000);
}
}
f1();
This method makes it easy to do all kinds of things like make the loop go faster by changing the interval or even injecting a different continuation function. It's quite powerful and easily abstracted to something very generic!
You can infinitely loop your javascript with setInterval:
<html>
<head>
<style>
#gallery {
width: 500px;
height: 300px;
background-color: red;
}
</style>
</head>
<body onload="f1()">
<div id="gallery">
</div>
</body>
<script type="text/javascript">
function f1(){
setInterval(oneSecondFunction, 9000);
};
function oneSecondFunction() {
setTimeout(
function() {
document.getElementById("gallery").style.backgroundColor = "blue";
}, 3000);
setTimeout(
function() {
document.getElementById("gallery").style.backgroundColor = "red";
}, 6000);
}
</script>
</html>
document.addEventListener('DOMContentLoaded', init);
function init() {
var target = document.getElementById('gallery');
setInterval(function() {
target.style.backgroundColor = getRandomColor();
}, 1000)
// From http://stackoverflow.com/questions/1484506/random-color-generator-in-javascript
function getRandomColor() {
var letters = '0123456789ABCDEF';
var color = '#';
for (var i = 0; i < 6; i++ ) {
color += letters[Math.floor(Math.random() * 16)];
}
return color;
}
}

How do I change the colour of a div with one button using Javascript?

I am very new to Javascript so feel free to point out anything I am doing wrong. I am trying to change the colour of a div everytime a button is clicked. This is my code so far:
function setBgColour(){
if (.backgroundColor == '#ff0000'){
document.getElementsByClassName("light")[0].style.backgroundColor = '#ffff00';
} else if (.backgroundColor == '#ffff00'){
document.getElementsByClassName("light")[0].style.backgroundColor = '#00ff00'
} else if (.backgroundColor == '#00ff00'){
document.getElementsByClassName("light")[0].style.backgroundColor = '#ff0000'
}
}
window.onload = function(){
document.getElementById('next').addEventListener('click', setBgColour);
};
The problem is with your condition statements. You're doing:
if (.backgroundColor == '#ff0000')
What's the element you're looking into, to get the backgroundColor property?
You should do something like:
window.onload = function() {
var current = '#ff0000';
function setBgColour() {
var light = document.getElementsByClassName("light")[0];
if (current == '#ff0000') {
current = '#ffff00';
} else if (current == '#ffff00') {
current = '#00ff00';
} else if (current == '#00ff00') {
current = '#ff0000';
}
light.style.backgroundColor = current;
}
document.getElementById('next').addEventListener('click', setBgColour);
setBgColour();
};
.light {
width: 100px;
height: 100px;
}
<div class="light"></div>
<button id="next">Next</button>

How to make this Jquery-blinking background stop after a few seconds?

How to make this Jquery-blinking background stop after a few seconds? I'm trying to set the background and text to blink and then stop after 3 seconds. Thanks for your help in advance!
$(document).ready(function() {
blinkFont();
});
function blinkFont() {
document.getElementById("blink").style.color = "red"
document.getElementById("blink").style.background = "black"
setTimeout("setblinkFont()", 500)
}
function setblinkFont() {
document.getElementById("blink").style.color = "black"
document.getElementById("blink").style.background = "red"
setTimeout("blinkFont()", 500)
}
#blink {
text-align: center;
background: #000000;
color: #F00;
margin: 0;
padding: 20px;
}
#blink span {
font-size: 2em;
font-weight: bold;
display: block;
}
<div id="blink"><span>This is blinking text and background</span>
</div>
While I could think of a few more elegant ways to do this, without changing your current structure too much, you could store the Timeouts in variables and then use clearInterval , which stops a timer, to stop the recurrences after three seconds:
<script>
var intervalA;
var intervalB;
$(document).ready(function() {
blinkFont();
setTimeout(function() {
clearInterval(intervalA); clearInterval(intervalB);},3000);
});
function blinkFont() {
document.getElementById("blink").style.color = "red"
document.getElementById("blink").style.background = "black"
intervalA = setTimeout("setblinkFont()", 500);
}
function setblinkFont() {
document.getElementById("blink").style.color = "black"
document.getElementById("blink").style.background = "red"
intervalB = setTimeout("blinkFont()", 500);
}
</script>
</head>
<body>
<div id="blink"><span>This is blinking text and background</span>
</div>
</body>
You have to use SetTimeout() , SetInterval() and clearInterval() as below code.
Click Here to see working Demo
HTML
<div id="blink"><span>Demo</span>
</div>
Jquery
$(document).ready(function(){
var myVar;
myVar = setInterval(blinkFont, 500);
function blinkFont() {
var curColor = document.getElementById("blink").style.color;
var curBgC = document.getElementById("blink").style.background;
document.getElementById("blink").style.color = curColor === "red" ? "blue" : "red";
document.getElementById("blink").style.background = curBgC === "black" ? "yellow" : "black";
}
setTimeout(function () {
$("#blink").css('visibility', 'visible');
clearInterval(myVar);
}, 3000); // after 3 seconds it'll stop blinking
});
Here is Working JsFiddle - Click Here
Instead of SetTimeout use SetInterval, keep the variable with you. And keep a counter, which will be incremented after every execution, once you reach the desired number of repetition, stopinterval.
Something like this:
myVar=setInterval("javascript function", milliseconds);
//check your counter value.
window.clearInterval(myVar)
Is this fiddle satisfied you?
code :
$(document).ready(function() {
var intval;
intval = setInterval(function(){
blinkFont();
},500);
setTimeout(function() {
alert('clear');
clearInterval(intval);
}, 3000);
});
function blinkFont() {
var curColor = document.getElementById("blink").style.color;
var curBgC = document.getElementById("blink").style.background;
document.getElementById("blink").style.color = curColor === "red" ? "blue" : "red";
document.getElementById("blink").style.background = curBgC === "black" ? "yellow" : "black";
}

Timed background color change

How can I change this script from jQuery to JavaScript? I have little experience with JavaScript and I don't know how to change it myself.
Script:
var rotate = function() {$("#Top")
.delay(1000).queue(function() {
$(this).css({
"background-color": "red"
});
$(this).dequeue();
})
.delay(3000).queue(function() {
$(this).css({
"background-color": "green"
});
$(this).dequeue();
})
.delay(500).queue(function(next) {
$(this).css({
"background-color": "blue"
});
$(this).dequeue();
next();
})
.queue(rotate);
};
rotate();
Html
<div id="Top"></div>
Original: http://jsfiddle.net/h4KL7/1/
John Resig is the guy who wrote jQuery and here is a blurb about How JavaScript Timers Work.
I know it is not perfect and could use setInterval() and clearInterval() to be more efficient, but this is a start DEMO
var rotate = function () {
var el = document.getElementById('Top');
setTimeout(function () {
el.style.backgroundColor = 'red';
setTimeout(function () {
el.style.backgroundColor = 'green';
setTimeout(function () {
el.style.backgroundColor = 'blue';
rotate();
}, 500);
}, 3000);
}, 1000);
}
Update: Added an array to reference timeout IDs to ensure that duplicates are not created in case time gets out of sync.
var rotate = function () {
var el = document.getElementById('Top');
var timers = new Array(3);
function red(el) {
el.style.backgroundColor = 'red';
timers[0] = setTimeout(function () { green(el); }, 1000);
clearTimeout(timers[2]);
}
function green(el) {
el.style.backgroundColor = 'green';
timers[1] = setTimeout(function () { blue(el); }, 3000);
clearTimeout(timers[0]);
}
function blue(el) {
el.style.backgroundColor = 'blue';
timers[2] = setTimeout(function () { red(el); }, 500);
clearTimeout(timers[1]);
}
red(el);
};
rotate();
The title of your post should be: "How can I change this from jQuery to CSS" ;-)
#-webkit-keyframes rainbow {
0% { background: #FFABAB; }
20% { background: #FFDAAB; }
40% { background: #DDFFAB; }
60% { background: #ABE4FF; }
80% { background: #D9ABFF; }
100% { background: #FFABAB; }
}
.top {
min-height: 200px;
-webkit-animation: rainbow 10s infinite steps(1);
}
If you want to have smooth transition between your background color just omit the steps(1) in the animation shorthand property.
Check this out!

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