给定HTML
<button id="showanswer">Show Answer</button>
当点击"This Frist Time Than add Class"时;一个";AND当返回点击它删除类";一个";
如何使用javascript
#showanswer {
display: inline-block;
line-height: 20px;
padding: 2px 5px 2px 25px;
color: #fff;
border: none;
font-size: 13px;
color: #fff;
background-color: #1bbc9b;
}
<button id="showanswer">Show Answer</button>
您可以切换类:
document.getElementById("showanswer").addEventListener("click", function(e){
e.target.classList.toggle("one");
});
#showanswer {
display: inline-block;
background: url(https://static.javatpoint.com/images/eye-black.png) 1px 1px no-repeat;
line-height: 20px;
padding: 2px 5px 2px 25px;
margin: 0 0 10px 0!important;
border: none;
font-size: 13px;
color: #fff;
border: none;
font-size: 13px;
color: #fff;
background-color: #1bbc9b;
}
<button id="showanswer">Show Answer</button>
例如,您可以使用document.querySelector
或document.getElementById
在JavaScript中选择特定元素,然后添加以下内容:
const showAnswerBtn = document.getElementById("showanswer");
showAnswerBtn.classList.toggle('one');