Javascript Extract from substring regex

Question

I don't have any experience with Regex. How do I extract the value of FieldInternalName from a string like below? Need only the value without quotes.

var idString = '<!--  FieldName="App" FieldInternalName="Application" FieldType="SPFieldLookup" -->';

WinnieThePooh · Accepted Answer · 2014-10-21 21:04:18Z

2

would something like this work for ya?

var idString = '<!--  FieldName="App" FieldInternalName="Application" FieldType="SPFieldLookup" -->';
var fieldInternalName = idString.match(/FieldInternalName="(.*?)"/i)[1];
alert(fieldInternalName);

answered Oct 21, 2014 at 21:04

WinnieThePooh

1261 silver badge4 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Sam · Accepted Answer · 2014-10-21 21:05:31Z

0

It is very easy to set up a simple expression that will "capture" the contents of FieldInternalName:

<!--.*?\bFieldInternalName="([^"]+)".*?-->

Demo

This expression works by looking for:

<!--
0+ characters (.*?)
FieldInternalName=" (preceded by a word boundary,\b, so that you don't match something like FakeFieldInternalName=")
1+ non-" characters ([^"]+)
"
0+ characters (.*?)
-->

Using RegExp.prototype.exec(), we can extract the contents of this match:

var idRegex = /<!--.*?\bFieldInternalName="([^"]+)".*?-->/,
    idString = '<!--  FieldName="App" FieldInternalName="Application" FieldType="SPFieldLookup" -->';

var matches = idRegex.exec(idString);
console.log(matches[1]);

<script src="https://getfirebug.com/firebug-lite-debug.js"></script>

answered Oct 21, 2014 at 21:05

Sam

20.5k2 gold badges48 silver badges71 bronze badges

1 Comment

WhoAmI Over a year ago

Didn't know there was such a tool with so much detail.Thanks!

Collectives™ on Stack Overflow

Javascript Extract from substring regex

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related