My code: Merge two objects object.assign

Object. Assign is not compatible with IE9, so write your own Object. Attach to Object.prototype, use Typeof Object.assign! = ‘function

var assign = function(params) {
    if(! params) { throw new TypeError('Assign requires an argument! ');
    }
    
    var newTarge = new Object();
    for (var index = 0; index < arguments.length; index++) {
      var source = arguments[index];
      if (source! = null) {for (var key in source) {
          if(! newTarge.hasOwnProperty(key)) { newTarge[key] =source[key]; }}}}return newTarge;
};
Copy the code