Javascript – What is alternative to find function?

February 19, 2022

I am using find () function for one of my project. Official document https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find says that Internet Explorer is not supported. What else can I use?

>Solution :

A polyfill is a code that provides the functionality that you normally expect the browser to provide you natively. Here is the polyfill for Array.find

if (!Array.prototype.find) {
  Array.prototype.find = function(predicate) {
    if (this === null) {
      throw new TypeError('Array.prototype.find called on null or undefined');
    }
    if (typeof predicate !== 'function') {
      throw new TypeError('predicate must be a function');
    }
    var list = Object(this);
    var length = list.length >>> 0;
    var thisArg = arguments[1];
    var value;

    for (var i = 0; i < length; i++) {
      value = list[i];
      if (predicate.call(thisArg, value, i, list)) {
        return value;
      }
    }
    return undefined;
  };
}