Remove all Backslashes from a String in JavaScript

Remove all Backslashes from a String #

To remove all backslashes from a string:

1. Call the replaceAll method, passing it a string containing 2 backslashes as the first parameter and an empty string as the second - str.replaceAll('\\', '').
2. The replaceAll method returns a new string with all of the matches replaced.

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const str = '1\\2\\3';

const replaced = str.replaceAll('\\', '');
console.log(replaced); // 👉️ '123'

The parameters we passed to the String.replaceAll method are:

1. a substring we want to match in the string. Notice that we need to escape the backslash with another backslash.
2. the replacement string, in our case an empty string

Note that the replaceAll method does not change the contents of the original string, it returns a new string with the matches replaced. Strings are immutable in JavaScript.

To remove all backslashes from a string:

1. Call the replace method, passing it a regular expression matching all backslashes as the first parameter and an empty string as the second.
2. The replace method will return a new string, which contains no backslashes.

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// Supported in IE 6-11

const str = '1\\2\\3';

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

The String.replace method takes the following parameters:

1. a regular expression we want to match in the string. Again, we have to escape the backslash with another backslash
2. the replacement string, in our case an empty string

We use the g (global) flag because we want to match all occurrences of a backslash and not just the first occurrence.

Further Reading #

• Check if String contains any Letter in JavaScript
• Check if String contains Special Characters in JavaScript
• Check if String starts with Substring in JavaScript
• Check if String ends with Substring in JavaScript
• Check if String starts with one of Multiple Values in JS
• How to count the words in a String in JavaScript
• Check if String contains only Latin Letters in JavaScript
• Check if a String is all Uppercase in JavaScript
• Check if First Letter of String is Uppercase in JavaScript
• Get first letter of each Word in a String in JavaScript
• Remove the Last Word from a String using JavaScript