but after reading the registration of Xiaomi"s official website, it is OK to ask how to achieve placeholder compatibility above IE9+
.forge placeholder, with label tags and disappear when onfocus
Pure HTML+CSS, seems to be better than placeholder attribute compatibility, although it is not perfect ~ / p >
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
.input {
width: 169px;
-webkit-appearance: textfield;
background-color: white;
-webkit-rtl-ordering: logical;
cursor: text;
padding: 1px;
border-width: 2px;
border-style: inset;
border-color: initial;
border-image: initial;
text-rendering: auto;
color: rgb(128, 114, 114);
letter-spacing: normal;
word-spacing: normal;
text-transform: none;
text-indent: 0px;
text-shadow: none;
text-align: start;
margin: 0em;
font: 400 13.3333px Arial;
}
.input:empty:not(:focus)::before {
content: attr(data-placeholder);
}
</style>
</head>
<body>
<div class="input" contenteditable data-placeholder=""></div>
<input type="text" placeholder="" />
</body>
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