I see that the form elements on Facebook are not highlighted when in focus. how can I do that?
例如，如果我在Chrome中点击这个文本框，它会变成橙色或黄色。
input:focus{outline:0;}只需更改一些表单元素的样式，浏览器默认设置就不会生效。
.textArea:focus
{
background-color:#FFF;
}
应用此类别到您的文本区域。或者一次应用到所有区域：
input:focus
{
background-color:#FFF;
}
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