--- title: Array.prototype.includes() slug: Web/JavaScript/Reference/Global_Objects/Array/includes tags: - ג'אווה סקריפט - מערך - פוליפיל - פרוטוטייפ translation_of: Web/JavaScript/Reference/Global_Objects/Array/includes ---
includes() קובעת אם מערך מכיל אלמנט מסויים, מחזיר true או false בהתאם.var boolean = array.includes(searchElement[, fromIndex])
searchElementfromIndex{{jsxref("Boolean")}}.
[1, 2, 3].includes(2); // true [1, 2, 3].includes(4); // false [1, 2, 3].includes(3, 3); // false [1, 2, 3].includes(3, -1); // true [1, 2, NaN].includes(NaN); // true
if (!Array.prototype.includes) {
  Array.prototype.includes = function(searchElement /*, fromIndex*/) {
    'use strict';
    if (this == null) {
      throw new TypeError('Array.prototype.includes called on null or undefined');
    }
    var O = Object(this);
    var len = parseInt(O.length, 10) || 0;
    if (len === 0) {
      return false;
    }
    var n = parseInt(arguments[1], 10) || 0;
    var k;
    if (n >= 0) {
      k = n;
    } else {
      k = len + n;
      if (k < 0) {k = 0;}
    }
    var currentElement;
    while (k < len) {
      currentElement = O[k];
      if (searchElement === currentElement ||
         (searchElement !== searchElement && currentElement !== currentElement)) { // NaN !== NaN
        return true;
      }
      k++;
    }
    return false;
  };
}
| מפרט | סטטוס | הערה | 
|---|---|---|
| {{SpecName('ES7', '#sec-array.prototype.includes', 'Array.prototype.includes')}} | {{Spec2('ES7')}} | הגדרה ראשונית | 
| {{SpecName('ESDraft', '#sec-array.prototype.includes', 'Array.prototype.includes')}} | {{Spec2('ESDraft')}} | 
| מאפיין | Chrome | Firefox (Gecko) | Internet Explorer | Edge | Opera | Safari | 
|---|---|---|---|---|---|---|
| תמיכה בסיסית | {{CompatChrome(47)}} | 43 | {{CompatNo}} | 14279+ | 34 | 9 | 
| מאפיין | Android | Android Webview | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android | 
|---|---|---|---|---|---|---|---|
| תמיכה בסיסית | {{CompatNo}} | {{CompatChrome(47)}} | 43 | {{CompatNo}} | 34 | 9 | {{CompatChrome(47)}} |