How to switch between two different colors with one button using javascript
Question
Im trying to change between two colors when I click on the event listener using JavaScript. When I trigger the click event, it changes the color to black. When I click on it again, I want it to change back to the default, which is white. I think that an if statement is involved, but Im not sure how the logic would work in this case.
<!DOCTYPE html>
<html>
<head>
<title>Light Switch</title>
<link rel="stylesheet" href="light.css" />
</head>
<body id="body">
<button id="submit">Submit
<label id="switch">
<input type="checkbox" checked>
<span class="slider"></span>
</label>
</button>
<script src="light.js"></script>
</body>
</html>
function start() {
var submit = document.getElementById("submit");
submit.addEventListener("click", toggle);
};
function toggle() {
var color = document.getElementById("body");
color.style.backgroundColor = "black";
};
start();
4 answers
solution1
4 ACCPTED 2018-03-16 06:05:01
You can use toggle function on the classList of that element. Add a class and toggle it.
function start() { var submit = document.getElementById("submit"); submit.addEventListener("click", toggle); }; function toggle() { var color = document.getElementById("body"); color.classList.toggle('black'); }; start();
.black { background-color: black; }
<body id="body"> <button id="submit">Submit <label id="switch"> <input type="checkbox" checked> <span class="slider"></span> </label> </button> </body>
You can also just check the current color and switch every time.
function start() { var submit = document.getElementById("submit"); submit.addEventListener("click", toggle); }; function toggle() { var color = document.getElementById("body"); var backColor = color.style.backgroundColor; color.style.backgroundColor = backColor === "black" ? "white" : "black"; }; start();
<body id="body"> <button id="submit">Submit <label id="switch"> <input type="checkbox" checked> <span class="slider"></span> </label> </button> </body>
solution2
2 2018-03-16 06:05:24
Instead of manipulating backgroundColor , You can create CSS class and add/remove it to the element using classList property
function start() { var submit = document.getElementById("submit"); submit.addEventListener("click", toggle); }; function toggle() { var color = document.getElementById("body"); color.classList.toggle("black"); }; start();
.black { background-color: black; }
<div id="body"> <button id="submit">Submit <label id="switch"> <input type="checkbox" checked> <span class="slider"></span> </label> </button> </div>
solution3
0 2018-03-16 06:09:16
Do like this, i think it work for you...
var background = document.getElementById(id).style.background;
var btn = addEventListener("click", function (){
if(background = "rgb(255,145,0)"){
document.getElementById(id).style.background = "red";
}
else
{
document.getElementById(id).style.background = "white";
}
});
solution4
0 2018-03-16 06:25:32
function start() { var submit = document.getElementById("submit"); submit.addEventListener("click", toggle); }; function toggle() { var color = document.getElementById("body"); if(color.style.backgroundColor==='black') color.style.backgroundColor=''; else color.style.backgroundColor = "black"; }; start();
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