创建添加
<body>
<input type="text" id="txt1">
<input type="button" id="btn1" value="创建">
<ul id="ul1">
</ul>
<script>
window.onload = function () {
var oUl = document.getElementById('ul1');
var oBtn = document.getElementById('btn1')
// id
var oTxt = document.getElementById('txt1')
// dom节点
var aLi = oUl.getElementsByTagName('li')
// class
// that.input = document.getElementsByClassName("js-input")[0];
// 自动选择第一个出现的css元素
// that.input = document.querySelector('.js-input');
oBtn.onclick = function () {
var oLi = document.createElement('li') //创建元素
oLi.innerHTML = oTxt.value
if (aLi.length > 0) {
oUl.insertBefore(oLi, aLi[0]) //插入元素到指定位置
} else {
oUl.appendChild(oLi) //插入元素到容器末尾
}
oTxt.value = ''
}
}
</script>
</body>
移除
<body>
<ul id="ul1">
<li>hjsioug<a href="javascript:;">删除</a></li>
<li>fssaaa<a href="javascript:;">删除</a></li>
<li>fddvfthc<a href="javascript:;">删除</a></li>
<li>gwsvgeex<a href="javascript:;">删除</a></li>
</ul>
<script>
window.onload = function () {
var oUl = document.getElementById('ul1');
var aA = oUl.getElementsByTagName('a');
for(var i = 0; i < aA.length; i++){
aA[i].onclick = function(){
oUl.removeChild(this.parentNode) //removeChild a标签的父节点
}
}
// 删除preTag标签本身
preTag.remove();
}
</script>
</body>
