<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
input {
color: #999;
outline: none;
}
</style>
</head>
<body>
<input type="text" value="手机">
<script>
var input = document.querySelector('input'); //获取元素
input.onfocus = function() {
//获取焦点
if (this.value == '手机') {
console.log('获取焦点');
this.value = ''; //清空默认value
}
this.style.color = '#333';
}
input.onblur = function() {
//失去焦点
if (this.value == '') {
//如果value 为空 则恢复‘手机’ 不为空则不执行
console.log('失去焦点');
this.value = '手机';
this.style.color = '#999'
}
}
</script>
</body>
</html>
js文本搜索框 焦点事件
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转载自blog.csdn.net/llt299022/article/details/113727974
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