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Question

I have the following string in Javascript and need to remove the <?xml ... ?> and <!DOCTYPE .... ]> tags. Can not convert it to a dom because the BR tags error as not being closed - and not able to edit the actual content.

  <?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html [<!ENTITY amp "&#38;#38;">]><div>Blah<br> Blah</div>

Trying to do it with .replace but can't quite seem to get there

    text.replace(/\<\?xml.+\?\>/g, '');

DarkAjax · Accepted Answer · 2019-01-22T19:49:11.937

8

Your replace() works for the <?xml ... ?> part.

To remove the <!DOCTYPE .... ]> part as well you can do:

text.replace(/\<\?xml.+\?\>|\<\!DOCTYPE.+]\>/g, '');

As you can see here: http://jsfiddle.net/darkajax/9fKnd/1/

edited Jan 22 '19 at 19:49

answered Mar 19 '13 at 22:39

DarkAjax

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score 5 · Answer 2 · answered Mar 19 '13 at 22:46

5

you can use this regex:

text.replace(/\<(\?xml|(\!DOCTYPE[^\>\[]+(\[[^\]]+)?))+[^>]+\>/g, '');

that works with :

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html [<!ENTITY amp "&#38;#38;">]><div>Blah<br> Blah</div>

<?xml version="1.0" encoding="UTF-8"?><div>Blah<br> Blah</div>

<!DOCTYPE html [<!ENTITY amp "&#38;#38;">]><div>Blah<br> Blah</div>

answered Mar 19 '13 at 22:46

Thomas Durieux

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So, what advantage does it offer over darkajax's answer from 8 minutes ago? – Benjamin Gruenbaum Mar 19 '13 at 22:47
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I'm more generic. If the content changes my regex continues to work. – Thomas Durieux Mar 20 '13 at 06:26

score 0 · Answer 3 · answered Dec 06 '18 at 17:47

The accepted answer has unnecessary escaping (extra back slashes, making an ugly regex uglier), this works too:

const text = '<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html [<!ENTITY amp "&#38;#38;">]><div>Blah<br> Blah</div>'

console.log(text)

const afterReplace = text.replace(/<\?xml.+\?>|<!DOCTYPE.+]>/g, '')

console.log(afterReplace)

Strip

3 Answers3