Question 218780 in Javascript Question posted in
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Javascript – Replacing exact usernames in a string

I’m trying to replace occurences in a string into something else. Lets say I have the following sentence:

Hi @john.doe, i see @john has tagged you

I have 2 usernames in this sentence: @john and @john.doe. I want this to become this sentence:

Hi @john.doe(1), i see @john(2) has tagged you

I’m doing it like this:

Text = text.replace(username, ‘${username}(${userId})’);

The problem is, when I loop over all usernames in the string and do a replace for each username, because @john is a username but also a part of another username, it doesn’t work.

How can I replace exact words in a string in js?

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2

Answers


  1. 0

    You can iterate over the usernames and replace them if they exist with the desired format:

    let str = 'Hi @john.doe, i see @john has tagged you, reply back to @john!';
const usernames = new Map([['john.doe', 1], ['john', 2]]);

[...usernames.entries()].forEach(([u, i]) => {
  const reg = new RegExp(`@${u}(?![a-z0-9_.-])`, 'g');
  if (str.match(reg)) {
    str = str.replace(reg, `${u}(${i})`);
  }
});

console.log(str);
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  2. 0

    Can you try to sort your usernames in descending order by their lengths, then try to replace/apply those in the given string? That’ll resolve your issue. Just make sure that while replacing values, if an id is already appended to a username, then skip those. Try this and let me know if this works for you.

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