mdn-polyfills
Version:
MDN polyfills
2 lines (1 loc) • 362 B
JavaScript
Array.prototype.findIndex||Object.defineProperty(Array.prototype,"findIndex",{value:function(r){if(null==this)throw new TypeError('"this" is null or not defined');var e=Object(this),t=e.length>>>0;if("function"!=typeof r)throw new TypeError("predicate must be a function");for(var n=arguments[1],o=0;o<t;){var i=e[o];if(r.call(n,i,o,e))return o;o++}return-1}});