javascript - Replace all instances of character in string in typescript? - Stack Overflow

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I'm trying to replace all full stops in an email with an x character - for example "[email protected]" would become "myxemail@emailxcom". Email is set to a string.
My problem is it's not replacing just full stops, it's replacing every character, so I just get a string of x's.
I can get it working with just one full stop, so I'm assuming I'm wrong on the global instance part. Here's my code:

let re = ".";
let new = email.replace(/re/gi, "x");

I've also tried

re = /./gi;
new = email.replace(re, "x");

If anyone can shed any light I'd really appreciate it, I've been stuck on this for so long and can't seem to figure out where I'm going wrong.

** Edit: Whoops, my new variable was actually called newemail, keyword new wasn't causing the issue!

I'm trying to replace all full stops in an email with an x character - for example "[email protected]" would become "myxemail@emailxcom". Email is set to a string.
My problem is it's not replacing just full stops, it's replacing every character, so I just get a string of x's.
I can get it working with just one full stop, so I'm assuming I'm wrong on the global instance part. Here's my code:

let re = ".";
let new = email.replace(/re/gi, "x");

I've also tried

re = /./gi;
new = email.replace(re, "x");

If anyone can shed any light I'd really appreciate it, I've been stuck on this for so long and can't seem to figure out where I'm going wrong.

** Edit: Whoops, my new variable was actually called newemail, keyword new wasn't causing the issue!

• javascript
• string
• typescript
• replace
• global

Share Improve this question Follow edited Apr 9, 2017 at 19:56 Rebecca asked Apr 9, 2017 at 19:28 RebeccaRebecca 67311 gold badge55 silver badges88 bronze badges 1

• 4 new is a reserved word in javascript – charlietfl Commented Apr 9, 2017 at 19:33

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3 Answers 3

Sorted by: Reset to default 104

Your second example is the closest. The first problem is your variable name, new, which happens to be one of JavaScript's reserved keywords (and is instead used to construct objects, like new RegExp or new Set). This means that your program will throw a Syntax Error.

Also, since the dot (.) is a special character inside regex grammar, you should escape it as \.. Otherwise you would end up with result == "xxxxxxxxxxxxxxxxxx", which is undesirable.

let email = "[email protected]"

let re = /\./gi;
let result = email.replace(re, "x");

console.log(result)

You can try split() and join() method that was work for me. (For normal string text) It was short and simple to implement and understand. Below is an example.

let email = "[email protected]";
email = email.split('.').join('x');

So, it will replace all your . with x. So, after the above example, email variable will have value myxemail@gmailxcom

You may just use replaceAll() String function, described here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replaceAll

If you are getting Property 'replaceAll' does not exist on type 'string' error - go to tsconfig.json and within "lib" change or add "es2021".

Like this:

More info here: Property 'replaceAll' does not exist on type 'string'

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