Question 297740 in Javascript Question posted in
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Javascript – How to find a specific substring inside a string, and append characters to every found instance

In JS, I am trying to manipulate a long plain string. I want to add new chars to each match inside the string in order to make a new string. I mean there are multiple values of the searched substring inside the long string. Any ideas?

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2

Answers


  1. 0

    Use replaceAll

    const s = 'the thesaurus is the best theatrical'

console.log(s.replaceAll('the', 'thexxx'))
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  2. 0

    If you want to append to certain text fragments, regardless of whether they are in lower or upper case you would need to use a regular expression with the flags g and i and use the group braces (( and )) to represent each encountered occurrence:

    const s = 'Any you can do I can do better. I can do any better than you! 😉'

console.log(s.replace(/(any)/gi, '$1thing'))
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