CODEWITHSUNDEEP
javascriptregex
MyrionSC2
MyrionSC2

Reputation: 1318

returning part of regex string in javascript

I want to get the video id of a youtube video using regex.

I have the following regex:

var VideoID = inputstring.match(/watch\?v=[A-Z,a-z,0-9]+($|\&)/);

This works fine. If i for instance put in:

https://www.youtube.com/watch?v=prHVlkFM9oc&index=9&list=RDxEwgEw3k6UA

It return this:

watch?v=prHVlkFM9oc&

But I only want the [A-Z,a-z,0-9]+ part of the regex (prHVlkFM9oc in the above code).

How do I get this? I could cut away 9 chars from the start after the regex returns, but that shouldn't be necessary.

Upvotes: 0

Views: 52

Answers (3)

floribon
floribon

Reputation: 19193

Simply use parenthesis ( ) to catch the part that you want to grab:

var match = inputstring.match(/watch\?v=([A-Za-z0-9]+)($|&)/);

// returns ["watch?v=prHVlkFM9oc&", "prHVlkFM9oc", "&"]

Now your result is in match[1];

Upvotes: 1

DoubleK
DoubleK

Reputation: 562

Well, if you are ok with VideoId variable you can do folowing: var parts = VideoId.split("="); so you can get that part as parts[1]

Upvotes: 1

anubhava
anubhava

Reputation: 786289

You can use a captured group here and grab the first index of the resulting array:

var VideoID = ( inputstring.match(/watch\?v=([^&]+)/) || ['', ''])[1];
//=> prHVlkFM9oc

Upvotes: 1

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