IE中不支持方法’assign’，该怎么做

我有一个小/ javascript，Babel脚本，在Chrome和Firefox浏览器中运行得很好，但在Internet Explorer 11中失败了。

我希望有人可以帮助我。

这是我的function：

getDaysWithEvents() { // Get all the days in this months calendar view // Sibling Months included const days = this.getCalendarDays(); // Set Range Limits on calendar this.calendar.setStartDate(days[0]); this.calendar.setEndDate(days[days.length - 1]); // Iterate over each of the supplied events this.props.events.forEach((eventItem) => { const eventStart = this.getCalendarDayObject(eventItem.start); const eventEnd = this.getCalendarDayObject(eventItem.end); const eventMeta = this.getEventMeta(days, eventStart, eventEnd); if (eventMeta.isVisibleInView) { const eventLength = eventMeta.visibleEventLength; const eventSlotIndex = days[eventMeta.firstVisibleDayIndex].eventSlots.indexOf(false); let dayIndex = 0; // For each day in the event while (dayIndex < eventLength) { // Clone the event object so we acn add day specfic data const eventData = Object.assign({}, eventItem); if (dayIndex === 0) { // Flag first day of event eventData.isFirstDay = true; } if (dayIndex === eventLength - 1) { // Flag last day of event eventData.isLastDay = true; } if (!eventData.isFirstDay || !eventData.isLastDay) { // Flag between day of event eventData.isBetweenDay = true; } // Apply Event Data to the correct slot for that day days[eventMeta.firstVisibleDayIndex + dayIndex].eventSlots[eventSlotIndex] = eventData; // Move to next day of event dayIndex++; } } }); return days; } 

错误：

 SCRIPT438: The object does not support the property or method 'assign' 

这一行有错误： var eventData = Object.assign({}, eventItem);

我可以改写这一行..？

怎么解决？

Answer 1

IE不支持Object.assign（）

使用polyfil

  if (typeof Object.assign != 'function') { Object.assign = function(target, varArgs) { // .length of function is 2 'use strict'; if (target == null) { // TypeError if undefined or null throw new TypeError('Cannot convert undefined or null to object'); } var to = Object(target); for (var index = 1; index < arguments.length; index++) { var nextSource = arguments[index]; if (nextSource != null) { // Skip over if undefined or null for (var nextKey in nextSource) { // Avoid bugs when hasOwnProperty is shadowed if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) { to[nextKey] = nextSource[nextKey]; } } } } return to; }; } 

如果你正在使用babel

 npm install --save-dev babel-plugin-transform-object-assign 

使用.babelrc

 { "plugins": ["transform-object-assign"] } 

你可以在这里找到其他方法

Answer 2

如果您使用的是jquery ，可以尝试jQuery.extend（target [，object1] [，objectN]） 。 你的代码：

 const eventData = $.extend({}, eventItem);