我在i标签上设置了一个eventlistener with class = glyphcolor我想要做的是每当我看到类checkglyph1的元素时它必须切换类,即如果类在那里它必须被删除,如果没有添加checkglyph1类的作用是改变文本的颜色。
首次点击时我看到第一个元素默认切换到此处我已经设置了它。在下一次点击时它会被移除而不是切换。
HTML部分:
<div class="row datasection">
<div class="todo">
<div class="databox col s6 waves-effect">
<p class="checkglyph1 ">Task to do</p>
<!-- </div> -->
<a>
<i class="material-icons checkglyph checkglyph1 glyphcolor">check</i>
</a>
</div>
</div>
</div>
JS:
var glyph= document.querySelector('.glyphcolor');
var par= document.getElementsByClassName('checkglyph1');
console.log(par[0]);
console.log(par[1]);
glyph.addEventListener('click', function () {
/* body... */
console.log("Qw");
par[0].classList.toggle("checkglyph1");
console.log(par[0]);
par[1].classList.toggle("checkglyph1");
})
CSS:
.datasection .todo .databox {
background-color: teal;
margin-left: 120px;
border-radius: 10px;
position: relative;
display: inline-block;
box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}
.databox p{
display: inline-block;
}
.databox a .checkglyph{
display: inline-block;
color: yellow;
position: absolute;
left: 90%;
top: 25%;
}
.databox a .checkglyph:hover{
display: inline-block;
}
.databox a .checkglyph1{
display: inline-block;
color: white;
cursor: pointer;
}
.databox .checkglyph1{
color: white;
cursor: text;
}
答案 0 :(得分:1)
getElementsByClassName是一个LIVE Html Collection。删除该类,该项目将从集合中删除。
var elems = document.getElementsByClassName("foo")
console.log("before", elems.length);
elems[0].classList.remove("foo");
console.log("after", elems.length);
&#13;
.foo { color: red; }
&#13;
<div class="foo">1</div>
<div class="foo">2</div>
&#13;