GitHub - es-shims/String.prototype.isWellFormed: An ESnext spec-compliant ` String.prototype.isWellFormed` shim/polyfill/replacement that works as far down as ES3.
string.prototype.substr CDN by jsDelivr - A CDN for npm and GitHub
Minko Gechev on X: "JavaScript tip: you can specify a function as a second parameter of String.prototype.replace to perform advanced string replacement. https://t.co/y2fwhjFJ19" / X
An Introduction to JavaScript Prototype for Beginners | JavaScript in Plain English
Frameweb | String Prototype by Numen/For Use
String Prototype | Numen / For Use
Extending the Javascript String Prototype | Codementor