JavaScript - regex that matches in any order

Question

I have the following regex that returns keyword values:

 var keywords = result.match(/<meta name="keywords" content="(.*?)".*/i)[1];

I also need to be able to support situations where the "keywords" and the "content" properties are in the reverse order e.g:

<meta content="...." name="keywords"

Can anyone advise how I can support both orders?

If that regex works, I wouldn't try to over-complicate things, just use another one with name and content reversed and then check which one returned values. — aurbano, Mar 31 '14 at 09:37
Can't you just target the given `meta[name=keyword]` element? — eithed, Mar 31 '14 at 09:38

score 1 · Answer 1 · edited May 23 '17 at 10:31

THE PONY HE COMES

With access to the DOM at your fingertips, you have no excuse not to dump your HTML into a temporary document (or, if it's the current document, work on it from there). Then, depending on browser version, you can just querySelector("meta[name=keywords]") or iterate through getElementsByTagName('meta') until you find the right one, before using getAttribute("content") to get the result.

score 0 · Accepted Answer · answered Mar 31 '14 at 09:37

0

Use positive lookahead to check first that the name="keywords" exists, then parse content.

var keywords = result.match(/<meta(?=[^>]*\bname="keywords")[^>]*\bcontent="(.*?)".*/i)[1];

answered Mar 31 '14 at 09:37

Sabuj Hassan

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@NiettheDarkAbsol can `""` contain `>` character? I don't know much about htmls. But that case it will not work. – Sabuj Hassan Mar 31 '14 at 09:39
Yes, attributes can contain `>`, this is one of the many reasons why the pony comes ;) – Niet the Dark Absol Mar 31 '14 at 10:40

JavaScript - regex that matches in any order

2 Answers2