JavaScript RegExp替换HTML注释

Question

I'm searching a way to replace all html comments from a string like browser does. (multilined and unclosed)

For example, I actually use /(<\\!--[\\s\\S]*?-->)/gim but if the html comment is unclosed, it does not replace it.

Normally, if the comment tag is not closed, comment tag gets everything after open tag...

Is there a way to adapt the regexp (or any other regexp) to do the stuff ? (in JavaScript)

Answer 1

This will mark all comments also the one without end tag: <!-- some text -->

<!--[\s\S]*?(?:-->|$)

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This will mark all comments also the one without end tag: <!-- some text //-->

<!--[\s\S]*?(?://-->|$)

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This will mark everything from the first <!-- to the very end of the file

<!--[\s\S]*?(?:$)     and regex set to `^$ don't match at line breaks`

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This will mark everything from the first <!-- to the end of the line

<!--.*

Answer 2

I must agree that using regex like this is not good practice and you shouldn't do it... here's why .

Buuuut, as a matter of understanding regex better, you can make something optional like this:

/(<\\!--[\\s\\S]*?(?:-->)?)/gim

1. I wrapped --> in parenthesis to group it together

2. I put a ? after that group to make it optional

3. (not necessary) I put ?: inside of the group to keep the regex engine from saving a back reference... it's a performance nuance.

Answer 3

Thanks to @Andie2302 for the help.

This regexp /<!--[\\s\\S]*?(?:-->|$)/gi work find.

Do not use the flag m !