Why does the cursor flash in IE? I reproduced your code: as shown
Solution ideas
The solution I will talk about here is mainly to use relative and absolute or CSS layers to solve it. Set the button to be displayed to position: relative; then set the upload button to position: absolute; and the upload button puts the layer at Display the upper layer of the button eg: z-index:999
Related information
I have also encountered the beautification of upload buttons before: portal input upload button beautification
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Cause
Why does the cursor flash in IE? I reproduced your code: as shown
Solution ideas
The solution I will talk about here is mainly to use relative and absolute or CSS layers to solve it. Set the button to be displayed to position: relative; then set the upload button to position: absolute; and the upload button puts the layer at Display the upper layer of the button eg: z-index:999
Related information
I have also encountered the beautification of upload buttons before: portal input upload button beautification