How to Remove all Hyphens from a String in JavaScript

Remove all Hyphens from a String #

To remove all hyphens from a string:

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

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const str = '1-2-3';

const hyphensRemoved = str.replaceAll('-', '');
console.log(hyphensRemoved); // 👉️ 123

We passed the following parameters to the String.replaceAll method:

1. a substring we need to match in the string, in our case a hyphen -
2. a replacement string for each match

The replaceAll method does not change the original string, it returns a new string with all matches replaced. Strings are immutable in JavaScript.

To remove all hyphens from a string:

1. Call the replace() method, passing it a regular expression that matches all hyphens as the first parameter and an empty string as the second.
2. The replace method will return a new string containing no hyphens.

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const str = '1-2-3';

const hyphensRemoved = str.replace(/-/g, '');
console.log(hyphensRemoved); // 👉️ 123

We passed the following parameters to the String.replace method:

1. a regular expression to match in the string
2. a replacement for each match

We use the g (global) flag in the regular expression, because we want to match all hyphens and not just the first occurrence of a hyphen.