Javascript remove extra underscores at the end of a string only

Question

I have a requirement to remove extra underscores from a string. The condition is if they occur at the very end of the string only.

As an example, we have DELL_ and DELL__ that needs to be changed to DELL.

I was considering using str.replace but I need to match cases specifically if it occurs at the end of the string and not all occurrences in that string. Also, I only want to run this script IF it detects the extra underscores.

I need to have some logic such as IF ( hasExtraUnderscores ) { remove extra underscores }

How can I do this in javascript?

NOTE: We are unable to use JQuery and need to do this in native javascript if possible.

http://stackoverflow.com/questions/2116558/fastest-method-to-replace-all-instances-of-a-character-in-a-string — ManoDestra, Mar 15 '16 at 16:32
not a dupe of that question because it needs to trim underscores & not remove internal ones — MatthewMartin, Mar 15 '16 at 16:33
Dupe of this one rtrim in javascript https://stackoverflow.com/questions/8791394/rtrim-in-javascript — MatthewMartin, Mar 15 '16 at 16:34
I am unable to use JQUERY in this case. The duplicate question has an answer but it is in jquery. Thanks. — pengz, Mar 15 '16 at 16:44

score 6 · Answer 1 · answered Mar 15 '16 at 16:32

6

Try this

var str = 'DELL_'
alert(str.replace(/_+$/,'');

answered Mar 15 '16 at 16:32

baao

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Javascript remove extra underscores at the end of a string only

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