Text Processing with JavaScript

replace()

The replace() method replaces matches with the given string. The pattern may be a string or a regex:

appendix/methods/methods_ex11.js

const str = "fish and chips";

// Using a string as the argument
console.log(str.replace("and", "&"));   // → fish & chips

// Using a regex as the argument
console.log(str.replace(/and/, "&"));   // → fish & chips

If the global flag is set, the method replaces every match it finds in the string:

appendix/methods/methods_ex12.js

const str = "$5, $10, $20";
const re = /\$/g;

console.log(str.replace(re, "€"));   // → €5, €10, €20