Implementation.

Author: ljharb

.eslintrc

@@ -8,6 +8,7 @@
 		"max-statements-per-line": [2, { "max": 2 }],
 		"max-statements": [2, 12],
 		"new-cap": [2, { "capIsNewExceptions": ["RequireObjectCoercible", "ToObject", "ToUint32", "IsCallable"] }],
-		"no-magic-numbers": 0
+		"no-magic-numbers": 0,
+		"strict": 1
 	}
 }

implementation.js

@@ -0,0 +1,34 @@
+'use strict';
+
+var ES = require('es-abstract/es5');
+var bind = require('function-bind');
+var isString = require('is-string');
+
+// Check failure of by-index access of string characters (IE < 9)
+// and failure of `0 in boxedString` (Rhino)
+var boxedString = Object('a');
+var splitString = boxedString[0] !== 'a' || !(0 in boxedString);
+
+var strSplit = bind.call(Function.call, String.prototype.split);
+
+module.exports = function every(callbackfn) {
+	var O = ES.ToObject(this);
+	var self = splitString && isString(O) ? strSplit(O, '') : O;
+	var len = ES.ToUint32(self.length);
+	var T;
+	if (arguments.length > 1) {
+		T = arguments[1];
+	}
+
+	// If no callback function or if callback is not a callable function
+	if (!ES.IsCallable(callbackfn)) {
+		throw new TypeError('Array.prototype.every callback must be a function');
+	}
+
+	for (var i = 0; i < len; i++) {
+		if (i in self && !(typeof T === 'undefined' ? callbackfn(self[i], i, O) : callbackfn.call(T, self[i], i, O))) {
+			return false;
+		}
+	}
+	return true;
+};

index.js

@@ -0,0 +1,24 @@
+'use strict';
+
+var define = require('define-properties');
+var ES = require('es-abstract/es6');
+
+var implementation = require('./implementation');
+var getPolyfill = require('./polyfill');
+var polyfill = getPolyfill();
+var shim = require('./shim');
+
+var slice = Array.prototype.slice;
+
+// eslint-disable-next-line no-unused-vars
+var boundEveryShim = function every(array, callbackfn) {
+	ES.RequireObjectCoercible(array);
+	return polyfill.apply(array, slice.call(arguments, 1));
+};
+define(boundEveryShim, {
+	getPolyfill: getPolyfill,
+	implementation: implementation,
+	shim: shim
+});
+
+module.exports = boundEveryShim;

polyfill.js

@@ -0,0 +1,14 @@
+var implementation = require('./implementation');
+
+module.exports = function getPolyfill() {
+	if (typeof Array.prototype.every === 'function') {
+		var hasPrimitiveContextInStrict = [1].every(function () {
+			'use strict';
+			return typeof this === 'string' && this === 'x';
+		}, 'x');
+		if (hasPrimitiveContextInStrict) {
+			return Array.prototype.every;
+		}
+	}
+	return implementation;
+};

shim.js

@@ -0,0 +1,14 @@
+'use strict';
+
+var define = require('define-properties');
+var getPolyfill = require('./polyfill');
+
+module.exports = function shimArrayPrototypeEvery() {
+	var polyfill = getPolyfill();
+	define(
+		Array.prototype,
+		{ every: polyfill },
+		{ every: function () { return Array.prototype.every !== polyfill; } }
+	);
+	return polyfill;
+};