how can i do to make position:fixed work well

2018-06-03 23:45:56

i have a div,

it's width is 200px ,height is 150px,

i want the style of div's position is fixed

To make it centered horizontally and vertically centered

尝试这个：

div{
    position:fixed;
    margin:auto;
    left:0; right:0; top:0; bottom:0;
    width:200px; height:150px;
}

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