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Asked: 2026-06-04T19:43:38+00:00

I was working on a parser that could read HTML however the code that

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I was working on a parser that could read HTML however the code that splits it causes “l”s to be inserted in every other entry of the produced array.

The regexp is this:

textarea.value.split(/(?=<(.|\n)+>)/)

What it’s supposed to do is split entry/exit/single HTML/XML tags while ignoring tabs and line terminators (it just appends them to tags they were split with)

May I have some insite as to what’s happening?
You can view code in action and edit here:
http://jsfiddle.net/termtm/ew7Mt/2/
Just look in console for result it produces.

EDIT: MaxArt is right the l in last <html> causes the anomalies to be “l”s

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1 Answer

  1. Editorial Team

    Try this:

    textarea.value.split(/(?=<[^>]+>)/);

    But… what Alnitak said. A fully-fledged HTML parser based on regexps, expecially with the poor feature support of regexps in Javascript, would be a terrible (and slow) mess.

    I still have to find out the reason of the odd behaviour you found. Notice that “l” (ell) is the last letter of "<html>", i.e., the first tag of your HTML code. Change it to something else and you’ll notice the letters change.

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