I want a div
to switch its class (toggle) onclick and then revert back to original class onclick again
My code is:
function myfunc() { //the code over here }
.normal { width:25%; height:25%; background: #f00; } .active { width:100%; height:100%; background: #f00; } #div{}
<body> <div id="div" onclick="myfunc()">click here</div> </body>
using pure js:
<div id="div" class="normal" onclick="myfunc(this)">click here</div>
js
function myfunc(div) {
var className = div.getAttribute("class");
if(className=="normal") {
div.className = "active";
}
else{
div.className = "normal";
}
}
Use:
// hasClass function hasClass(elem, className) { return new RegExp(' ' + className + ' ').test(' ' + elem.className + ' '); } // toggleClass function toggleClass(elem, className) { var newClass = ' ' + elem.className.replace( /[\\t\\r\\n]/g, " " ) + ' '; if (hasClass(elem, className)) { while (newClass.indexOf(" " + className + " ") >= 0 ) { newClass = newClass.replace( " " + className + " " , " " ); } elem.className = newClass.replace(/^\\s+|\\s+$/g, ''); } else { elem.className += ' ' + className; } } document.getElementById('div').onclick = function() { toggleClass(this, 'active'); }
div { margin:20px; padding:10px 15px; background:#FFD202; border-radius:5px; color:#222; display:inline-block; text-decoration:none; } .active { background:#000; color:#FFD202; }
<div id="div" href="#">Click a few times, toggle me!</div>
function myFunc(e) {
if(e.className == 'active') {
e.className = 'normal';
} else {
e.className = 'active';
}
}
then have:
<div id="div" onclick="myFunc(this)">blah</div>
pretty sure that is answered in a number of other questions round here too.
I've been looking for a solution myself where I want to toggle between two images with pure JavaScript. I think this is quite an effective method of using JavaScript. (I had to switch between a plus and a minus image sign on user click.)
<a href="#" class="plus" onclick="toggleClass(this,'minus')">Text here</a>
.plus {
background-image: url(../img/plus-circle-grey.svg);
}
.minus {
background-image: url(../img/minus-circle-grey.svg);
}
function toggleClass(e,c) {
(e).classList.toggle(c);
}
Works like a charm.
Move away from obtrusive JavaScript, bind the event-handlers in the JavaScript of the page, not in the HTML (this makes for easier future maintenance):
function classToggle() {
this.classList.toggle('class1');
this.classList.toggle('class2');
}
document.querySelector('#div').addEventListener('click', classToggle);
do:
function myfunc(){
var divEle = document.getElementById("div"),
current_class = divEle.className;
divEle.className = (current_class == "active") ? "normal" : "active";
}
A good way to approach your dilemma is using the classList API. I switch classes using nested for loops (for repeating instances of a class) and query the document like so:
var desiredElement = document.querySelectorAll('.light');
function switchTheme() {
for (var i = 0; i < desiredElement.length; i++) {
if (desiredElement[i].classList.contains('light')) {
desiredElement[i].classList.remove('light');
desiredElement[i].classList.add('dark');
} else if (desiredElement[i].classList.contains('dark')) {
desiredElement[i].classList.remove('dark');
desiredElement[i].classList.add('light');
}
}
}
By adding a button or hyperlink to either perform this function onclick or as href, I can toggle any element in the HTML document containing the light or dark class and effectively make a toggle switch to switch the sub design classes.
I used this to create a dark theme for a website that can toggle to a lighter theme by the user if desired.
var desiredElement = document.querySelectorAll('.light'); function switchTheme() { for (var i = 0; i < desiredElement.length; i++) { if (desiredElement[i].classList.contains('light')) { desiredElement[i].classList.remove('light'); desiredElement[i].classList.add('dark'); } else if (desiredElement[i].classList.contains('dark')) { desiredElement[i].classList.remove('dark'); desiredElement[i].classList.add('light'); } } }
.light { background-color: #ddd; } .dark { background-color: #333; }
<DOCTYPE HTML> <html> <body class="light"> <button onclick="switchTheme()">Toggle</button> </body> </html>
已经有不少答案,但我认为这是最简单/最简洁的方法:
<div onclick="$(this).toggleClass("active")">click here</div>
If you want to switch/swap class-A
and class-B
, toggle both classes:
function myFunc(element) {
element.classList.toggle("class-A");
element.classList.toggle("class-B");
}
And
<div onclick="myFunc(this)" />
Try it with jquery may this help
html-
<div id="div1" class="normal">click here</div>
<div id="div2" class="normal">click here</div>
css-
.normal{ width:25%;height:25%;background: #f00;}
.active{ width:100%;height:100%;background: #f00;}
jquery-
$(document).ready(function(){
$(".normal").click(function(){
var thisobj = $(this);
if(thisobj.hasClass("active"))
{
$(this).removeClass("active");
}else
{
$(this).addClass("active");
}
});
});
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