Record the IE8 compatibility issues that are encountered in the summary

1, pseudo element: First-child does not work, need to specify style name separately

2, the transparency representation method, especially in the function representation

{  -webkit-opacity: $value;   -moz-opacity: $value;   -ms-opacity: $value;   -o-opacity: $value;   filter: Alpha (opacity= $value *100)//0~100, so *100  opacityis required here:  $value;}

3,input text is centered vertically and the text in ie8-is not vertically centered by default. FIX: Line-height must be set

4, Answer 3: Compatible with the text of IE is not centered, open safari again see, placeholder unexpectedly biased, after find out that Safari does not need line-height, then we take IE8 hack, "\9", ex:

input {    height: 32px;     line-height: 32px\9;//IE8 's hack notation}

Record the IE8 compatibility issues that are encountered in the summary