div的placeholder另类实现

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.editable {

font-size: 12px;

border: 1px solid#eeeeee;

color: #cccccc;

padding: 15px 15px;

overflow-y: auto;

outline: none;

}

.editable:focus:before{

content: none;

}

.editable:empty:before{

content:attr(placeholder);

}