To remove all commas from a string call the `replaceAll()` method, passing it a comma as the first parameter and an empty string as the second. The `replaceAll` method returns a new string with all matches replaced by the provided replacement.

Remove all Commas from a String in JavaScript


## Remove all Commas from a String

**To remove all commas from a string:**

1. Call the `replaceAll()` method, passing it a comma as the first parameter and
   an empty string as the second.
2. The `replaceAll` method returns a new string with all matches replaced by the
   provided replacement.

```javascript:index.js
const str = '1,23,45.67';

const withoutCommas = str.replaceAll(',', '');
console.log(withoutCommas); // 👉️ '12345.67'
```

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The first parameter we pass to the
[String.replaceAll](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replaceAll)
method is the string we want to match.

And the second parameter is the replacement for each match.

<Alert>
  The <code>replaceAll</code> method does not change the contents of the
  original string, it returns a new string with all matches replaced. Strings
  are immutable in JavaScript.
</Alert>

We could pass a regular expression as the first parameter to the `replaceAll`
method, but we don't have to.

For our purposes a basic string containing a comma will suffice.

<Alert type="error">
  The <code>replaceAll</code> method is not supported in Internet Explorer
  versions 6-11. If you need to support the browser, use the{' '}
  <code>replace</code> method instead.
</Alert>

**To remove all commas from a string, call the `replace()` method, passing it a
regular expression to match all commas as the first parameter and an empty
string as the second parameter. The replace method will return a new string with
all of the commas removed.**

```javascript:index.js
// Supported in IE 6-11
const str = '1,23,45.67';

const withoutCommas = str.replace(/,/g, '');

console.log(withoutCommas); // 👉️ '12345.67'
```

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The first parameter we passed to the
[String.replace](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace)
method is a regular expression that matches all the commas in the string.

We use the the `g` (global) flag at the end of the regex, because we want to
match all commas and not just the first occurrence in the string.

The second parameter is the replacement for each match, in our case we replace
all commas with an empty string.

<Alert>
  The <code>replace</code> method does not change the contents of the original
  string, it returns a new string with the matches replaced.
</Alert>

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Remove all Commas from a String in JavaScript

Remove all Commas from a String #

Borislav Hadzhiev

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Remove all Commas from a String in JavaScript