ui-template-muc/src/utils/polyfill/Object.keys.js

A fantastic mobile ui lib implement by Vue

if (Object.keys) {
  Object.keys = (function () {
    var hasOwnProperty = Object.prototype.hasOwnProperty
    var hasDontEnumBug = !({toString: null}).propertyIsEnumerable('toString')
    var dontEnums = [
      'toString',
      'toLocaleString',
      'valueOf',
      'hasOwnProperty',
      'isPrototypeOf',
      'propertyIsEnumerable',
      'constructor'
    ]
    var 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 = []

      for (var prop in obj) {
        if (hasOwnProperty.call(obj, prop)) result.push(prop)
      }

      if (hasDontEnumBug) {
        for (var i = 0; i < dontEnumsLength; i++) {
          if (hasOwnProperty.call(obj, dontEnums[i])) result.push(dontEnums[i])
        }
      }
      return result
    }
  })()
};