remove-prefix

Removes a string from the beginning of another string.

Installation

Requires Node.js 6.0.0 or above.

npm i remove-prefix

API

The module exports a single function.

Parameters

1. Bindable: subject (string): The string that may or may not have a prefix to be removed.
2. ...prefixes (one or more of: string or Array of strings): The first prefix found will be removed. Longer prefixes are checked first.

Return Value

A two-element Array:

1. The string without its prefix, or the original string if no prefix was found.
2. The prefix if one was found; otherwise an empty string.

Example

const removePrefix = require('remove-prefix')
 
const subject = 'abcdef'
let result, prefix
 
// Removes the prefix
[result] = removePrefix(subject, 'abc')
result // 'def'
 
// Returns prefix as second element, or returns an empty string if not found
[result, prefix] = removePrefix(subject, 'xyz')
result // 'abcdef'
prefix // ''
 
// Removes the first prefix found. Longer prefixes are checked first.
// Prefixes can be given as an arguments list or in an array.
[result, prefix] = removePrefix(subject, 'xyz', 'abc', 'de')
result // 'def'
prefix // 'abc'
 
// Supports the bind operator
subject::removePrefix('abc') // ['def', 'abc']

Related

• remove-suffix: Removes a string from the end of another string.