css 此代码选择并更改html5占位符元素。您现在可以根据需要设置样式。

Posted 2021-05-13

:-webkit-input-placeholder { color: #000; font-family: sans-serif; }
::-moz-placeholder { color: #000; font-family: sans-serif; } 
:-ms-input-placeholder { color: #000; font-family: sans-serif; }
input:-moz-placeholder { color: #000; font-family: sans-serif; }

.required::-webkit-input-placeholder:after { content: "*"; color: red; } 
.required::-moz-placeholder:after { content: "*"; color: red; } 
.required:-ms-input-placeholder:after { content: "*"; color: red; } 
.requiredinput:-moz-placeholder:after { content: "*"; color: red; }