locutus/esm/elixir/String/replace.js

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

function escapeRegExp(value) {
    return value.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}
export function replace(string, pattern, replacement) {
    //      discuss at: https://locutus.io/elixir/replace/
    // parity verified: Elixir 1.18
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //       example 1: replace('hello world', 'l', 'L')
    //       returns 1: 'heLLo worLd'
    //       example 2: replace('abcabc', 'ab', 'x')
    //       returns 2: 'xcxc'
    const source = String(string);
    const needle = String(pattern);
    const replacementText = String(replacement);
    if (needle === '') {
        if (source === '') {
            return replacementText;
        }
        return `${replacementText}${Array.from(source).join(replacementText)}${replacementText}`;
    }
    return source.replace(new RegExp(escapeRegExp(needle), 'g'), () => replacementText);
}