locutus/esm/golang/strings/CutPrefix.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

export function CutPrefix(s, prefix) {
    //      discuss at: https://locutus.io/golang/strings/CutPrefix
    // parity verified: Go 1.23
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //          note 1: Returns [after, found] and mirrors Go strings.CutPrefix behavior.
    //       example 1: CutPrefix('abc', 'a')
    //       returns 1: ['bc', true]
    //       example 2: CutPrefix('abc', '')
    //       returns 2: ['abc', true]
    //       example 3: CutPrefix('abc', 'd')
    //       returns 3: ['abc', false]
    const value = String(s);
    const candidatePrefix = String(prefix);
    if (value.startsWith(candidatePrefix)) {
        return [value.slice(candidatePrefix.length), true];
    }
    return [value, false];
}