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Required. The red asterisk disappears after entering the content

2022-04-21 13:07:00 【Is the rookie wonderful】

html
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use v-if Make a judgment for the asterisk , Bind an event to the input box in both directions .（ When the input asterisk disappears ）

cs
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to isEmpty Made a ternary operation judgment , If yes, display the previous properties , No after .
js
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The asterisk style exists by default .
Here we use computed Compute properties ,computed Yes set and get Two values ; stay get Returns a null value in . And then in set Make judgment in the setting .（ In fact, I don't quite understand why I want to be in get Returns a null value in ）

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