string.prototype.includes

A robust & optimized `String.prototype.includes` polyfill, based on the ECMAScript 6 specification.

string.prototype.startswith

A robust & optimized `String.prototype.startsWith` polyfill, based on the ECMAScript 6 specification.

string.prototype.repeat

A robust & optimized `String.prototype.repeat` polyfill, based on the ECMAScript 6 specification.

string.prototype.codepointat

A robust & optimized `String.prototype.codePointAt` polyfill, based on the ECMAScript 6 specification.