How to replace the value of a string within a string in javascript

Question

Let's say I have a string like the following "#f1groupId#f1:#f1vb2E8F#f1v". How do I replace everything between the first "#f1v" and the second "#f1v" with the word "Other" for example. i know how to do it with indexOf and substrings, but I was looking for a smarter way to do it. Maybe with regex?

This isn't a duplicate of that question because I didn't ask how to replace all occurrences of a string within another string. I asked how to replace a dynamic string that has a given start tag and end tag, but a dynamic string in between.

"#f1groupId#f1:#f1vb2E8F#f1v".replace(/#f1v(.*)#f1v/, "#f1vOther#f1v") — juvian
– juvian, Commented Jul 4, 2018 at 20:44
Possible duplicate of How to replace all occurrences of a string in JavaScript? — user5734311
– user5734311, Commented Jul 4, 2018 at 20:49
@PaulFabbroni You didn't say anything about "dynamic". Doesn't matter though; that question has several answers which explain at length the various method you can use. While it's not a 100% perfect duplicate, everything you need is in there. — user5734311
– user5734311, Commented Jul 5, 2018 at 7:35
It's pretty obvious that's a dynamic string (and I said "like the following" meaning similar to), but yes I should have said dynamic. I did an extensive search and didn't find my answer which is confirmed by the fact that the answer provided here does not match any of the ones I found. — Paul Fabbroni
– Paul Fabbroni, Commented Jul 5, 2018 at 10:57

Raj Kumar · Accepted Answer · 2018-07-04 20:55:41Z

2

You can try something like this :

<script>
var a ='#f1groupId#f1:#f1vb2E8F#f1v';
a = a.replace(/f1v.*f1v/, 'f1votherf1v')
</script>

I hope it will help you.

answered Jul 4, 2018 at 20:55

Raj Kumar

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2 Comments

Paul Fabbroni Over a year ago

Thanks Raj!! I was close, but did the .* Part wrong

Paul Fabbroni Over a year ago

using your answer you forgot the # at the end, you would need a = a.replace(/f1v.*f1v/, 'f1vother#f1v'), but to ensure I grabbed the tags properly juvian's answer above is probabyl the best. Thanks so much for the help though!

Paul Fabbroni · Accepted Answer · 2018-07-05 14:07:08Z

0

"#f1groupId#f1:#f1vb2E8F#f1v".replace(/#f1v(.*)#f1v/, "#f1vOther#f1v") did the trick. Thank-you @Juvian!

answered Jul 5, 2018 at 14:07

Paul Fabbroni

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