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本文档使用
php.cn手册 发布
文字
语法：
E::placeholder { sRules }
说明：
设置对象文字占位符的样式。
::placeholder 伪元素用于控制表单输入框占位符的外观，它允许开发者/设计师改变文字占位符的样式，默认的文字占位符为浅灰色。
当表单背景色为类似的颜色时它可能效果并不是很明显，那么就可以使用这个伪元素来改变文字占位符的颜色。
需要注意的是，除了Firefox是 ::[prefix]placeholder，其他浏览器都是使用 ::[prefix]input-placeholder
Firefox支持该伪元素使用text-overflow属性来处理溢出问题。
::placeholder的使用示例:
<input type="text" placeholder="占位符" />input::-webkit-input-placeholder{ color: #999; } input:-ms-input-placeholder{ // IE10+ color: #999; } input:-moz-placeholder{ // Firefox4-18 color: #999; } input::-moz-placeholder{ // Firefox19+ color: #999; }
兼容性：
| IE | Firefox | Chrome | Safari | Opera | iOS Safari | Android Browser | Android Chrome |
|---|---|---|---|---|---|---|---|
| 6.0-9.0 | 2.0-3.6 | 4.0-43.0 -webkit- | 3.1-4.0 | 15.0-28.0 -webkit- | 3.2-4.1 | 2.1-4.4.4 -webkit- | 18.0-40.0 -webkit- |
| 10.0-11.0 -ms- | 4.0-18.0 -moz- #1 | 5.0-8.1 -webkit- | 4.3-8.1 -webkit- | ||||
| 19.0-38.0 -moz- |
::-moz-placeholder 伪元素在Firefox 19+替代了之前的 :-moz-placeholder 伪类
示例：
实例
<!DOCTYPE html>
<html lang="zh-cmn-Hans">
<head>
<meta charset="utf-8" />
<title>E::placeholder_CSS参考手册_web前端开发参考手册系列</title>
<meta name="author" content="Joy Du(飘零雾雨), dooyoe@gmail.com, www.doyoe.com" />
<style>
input::-webkit-input-placeholder {
color: green;
}
input:-ms-input-placeholder { // IE10+
color: green;
}
input:-moz-placeholder { // Firefox4-18
color: green;
}
input::-moz-placeholder { // Firefox19+
color: green;
}
</style>
</head>
<body>
<input id="test" placeholder="Placeholder text!">
</body>
</html>
运行实例 »
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