week2day1 web前端 动态添加和删除（火龙果苹果）
2018-12-10 本文已影响0人
学python的铁头娃
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
{
margin: 0;
padding: 0;
position: relative;
}
#top{
margin-left: 60px;
margin-top: 60px;
}
#top div{
width: 200px;
height: 50px;
color: white;
font-size: 20px;
margin-bottom: 2px;
text-align: center;
line-height: 50px;
}
#top div font{
position: absolute;
right: 3px;
/将光标变成手*/
cursor: pointer;
}
#bottom{
margin-left: 60px;
}
#bottom #text{
display: inline-block;
width: 200px;
height: 50px;
border: none;
outline: none;
/*让光标在中间*/
text-align: center;
border-bottom: 2px solid lightgrey;
font-size: 16px;
}
#bottom #button{
display: inline-block;
width: 100px;
height: 30px;
border: none;
outline: none;
background-color: coral;
color: white;
}
</style>
</head>
<body>
<div id="top">
</div>
<!--添加默认的水果标签-->
<script type="text/javascript">
var fruitArray = ['香蕉', '苹果', '草莓', '火龙果'];
for(index in fruitArray){
fruitName = fruitArray[index];
creatFruitNode(fruitName, 'darkgreen')
}
//==========删除水果=============
function delFruit(){
//在这儿，点击的是哪个标签this就指向谁
this.parentElement.remove()
}
//添加节点
function creatFruitNode(fruitName, color1){
//创建标签
var fruitNode = document.createElement('div')
fruitNode.innerHTML = fruitName;
var fontNode = document.createElement('font');
fontNode.innerText = '×';
//给点击事件绑定驱动程序
fontNode.onclick = delFruit;
fruitNode.appendChild(fontNode);
//设置背景颜色
fruitNode.style.backgroundColor = color1
//添加标签
var topNode = document.getElementById('top')
topNode.appendChild(fruitNode)
}
</script>
<div id="bottom">
<input type="text" name="" id="text" value="" />
<input type="button" name="" id="button" value="确定" onclick="addFruit()"/>
</div>
<script type="text/javascript">
//=========产生随机颜色=============
function randomColor(){
var num1 = parseInt(Math.random()*255);
var num2 = parseInt(Math.random()*255);
var num3 = parseInt(Math.random()*255);
return 'rgb('+num1+','+num2+','+num3+')';
}
//==========添加水果==============
function addFruit(){
//获取输入框中的内容
var inputNode = document.getElementById('text');
var addName = inputNode.value;
if(addName.length == 0){
alert('输入的内容为空！');
return;
}
//清空输入框中的内容
inputNode.value = '';
//创建标签
var fruitNode = document.createElement('div');
fruitNode.innerHTML = addName;
var fontNode = document.createElement('font');
fontNode.innerText = '×';
//给点击事件绑定驱动程序
fontNode.onclick = delFruit;
fruitNode.appendChild(fontNode);
//创建随机颜色
//'rgb(255, 0, 0)'
fruitNode.style.backgroundColor = randomColor();
var topNode = document.getElementById('top');
topNode.insertBefore(fruitNode, topNode.firstChild);
}
</script>
</body>
</html>
