diff options
Diffstat (limited to 'include/util.js')
-rw-r--r-- | include/util.js | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/include/util.js b/include/util.js index 05c1ac3..ea14b5b 100644 --- a/include/util.js +++ b/include/util.js @@ -84,6 +84,47 @@ if (!Array.prototype.indexOf) }; } +// From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys +if (!Object.keys) { + Object.keys = (function () { + 'use strict'; + var hasOwnProperty = Object.prototype.hasOwnProperty, + hasDontEnumBug = !({toString: null}).propertyIsEnumerable('toString'), + dontEnums = [ + 'toString', + 'toLocaleString', + 'valueOf', + 'hasOwnProperty', + 'isPrototypeOf', + 'propertyIsEnumerable', + 'constructor' + ], + dontEnumsLength = dontEnums.length; + + return function (obj) { + if (typeof obj !== 'object' && (typeof obj !== 'function' || obj === null)) { + throw new TypeError('Object.keys called on non-object'); + } + + var result = [], prop, i; + + for (prop in obj) { + if (hasOwnProperty.call(obj, prop)) { + result.push(prop); + } + } + + if (hasDontEnumBug) { + for (i = 0; i < dontEnumsLength; i++) { + if (hasOwnProperty.call(obj, dontEnums[i])) { + result.push(dontEnums[i]); + } + } + } + return result; + }; + }()); +} // // requestAnimationFrame shim with setTimeout fallback |