locutus/rust/str/strip_suffix.js

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

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.strip_suffix = strip_suffix;
function strip_suffix(suffix, str) {
    //      discuss at: https://locutus.io/rust/strip_suffix/
    // parity verified: Rust 1.85
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //          note 1: Returns the remainder before the final matching suffix, or null when the suffix is absent.
    //       example 1: strip_suffix('.rs', 'lib.rs')
    //       returns 1: 'lib'
    //       example 2: strip_suffix('.ts', 'lib.rs')
    //       returns 2: null
    //       example 3: strip_suffix('', 'abc')
    //       returns 3: 'abc'
    const source = String(str);
    const value = String(suffix);
    if (!source.endsWith(value)) {
        return null;
    }
    return source.slice(0, source.length - value.length);
}