如何将 Internet Explorer 10 支持添加到简单的 VueJs 组件？

Question

我正在构建一个简单的 VueJs 组件，它根本不会在 IE 10 中呈现。

背景：Vue 组件是一个公司事件列表，支持基本的过滤和排序。不幸的是，我必须支持IE10。我没有使用 babel，但尝试使用它来解决这个问题 - 没有效果

我得到的错误是'city' is undefined。 IE10 是唯一遇到此问题的浏览器。

Here's a CodePen 只是相关代码。我添加了 cmets 以澄清发生了什么。这里只是 JS（请参阅 CodePen 了解完整代码和更好的上下文）：

/* Server rendered data */

var events = [{
        path: "events/residuals-biosolids",
        name: "Residuals & Biosolids Conference",
        sortDate: "1536165900000",
        startDate: "4 September 2018",
        endDate: "5 October 2018",
        displayDate: "September 4 - October 5, 2018",
        state: "WI",
        city: "Milwaukee",
        booth: "342",
        featuredImg: "https://cdn2.hubspot.net/hubfs/4299619/event%20thumb.png"
      }, {
        path: "events/bio-expo",
        name: "Biosolid Expo",
        sortDate: "1548979200000",
        startDate: "6 February 2019",
        endDate: "5 March 2019",
        displayDate: "February 6 - March 5, 2019",
        state: "MN",
        city: "Eagan",
        booth: "12",
        featuredImg: ""
      }, {
        path: "events/world-ag-expo",
        name: "World AG Expo",
        sortDate: "1549670400000",
        startDate: "7 February 2019",
        endDate: "2 February 2019",
        displayDate: "February 7 -  2, 2019",
        state: "CA",
        city: "Tulare",
        booth: "3815",
        featuredImg: ""
      }];
      var eventsDesc = [{
        path: "world-ag-expo",
        name: "World AG Expo",
        sortDate: "1549670400000",
        startDate: "7 February 2019",
        endDate: "2 February 2019",
        displayDate: "February 7 -  2, 2019",
        state: "CA",
        city: "Tulare",
        booth: "3815",
        featuredImg: ""
      }, {
        path: "bio-expo",
        name: "Biosolid Expo",
        sortDate: "1548979200000",
        startDate: "6 February 2019",
        endDate: "5 March 2019",
        displayDate: "February 6 - March 5, 2019",
        state: "MN",
        city: "Eagan",
        booth: "12",
        featuredImg: ""
      }, {
        path: "residuals-biosolids",
        name: "Residuals & Biosolids Conference",
        sortDate: "1536165900000",
        startDate: "4 September 2018",
        endDate: "5 October 2018",
        displayDate: "September 4 - October 5, 2018",
        state: "WI",
        city: "Milwaukee",
        booth: "342",
        featuredImg: "https://cdn2.hubspot.net/hub/4299619/hubfs/event%20thumb.png?width=760&name=event%20thumb.png"
      }];
      var selectedStates = ["CA", "MN", "WI", ];
      var selectedCities = ["Eagan", "Milwaukee", "Tulare", ];

      /*

      Vue code below

      */
      var app = new Vue({
       el: "#sg-events-wrapper",
       data: {
          message: "Hello Vue!",
          dateOrder: "ascending",
          selectedCity:"none",
          selectedState:"none",
    /*the data below is pulled from the script tag in the page.*/
          eventCities:selectedCities,
          eventStates:selectedStates,
          eventList: events,
          eventListDesc:eventsDesc,
       },
       computed: {
          eventsSorted:function(){
            /*chooses which server generated list to use for rendering events*/
             if(this.dateOrder=="ascending"){
                return this.eventList;
             }
             else{
                return this.eventListDesc; 
             }
          },

       },
       methods:{
         /*handles the visual filtering when someone sets city and or state*/
          isInStateAndCity:function(eventsCity,eventsState){
             var citiesMatch;
             var statesMatch;
             if(eventsCity == this.selectedCity || this.selectedCity=="none"){
                citiesMatch = true;
             }else{
                citiesMatch = false;
             }
             if(eventsState == this.selectedState ||this.selectedState=="none"){
                statesMatch = true;
             }else{
                statesMatch = false;
             }
             if(citiesMatch && statesMatch){
                return true;
             }else{
                return false;
             }

          }

       }
    });

我尝试过的故障排除步骤：

• 使用 babel，虽然我的代码最初不是这样写的。
• 我使用了 babel-polyfill - 似乎没有效果。
• 我尝试将正文中脚本标记中的 js 放入主 JS 文件中，以查看在 HTML 中的代码之前由于某种原因加载 js 文件是否存在问题。没有效果。

我认为可能是导致问题的原因：IE10 不喜欢像我正在做的那样将属性值分配给对象。不确定这一点。这只是一个猜测，我想不出其他方法。

IE 10 控制台错误和 CodePen 渲染失败的屏幕截图，以防万一。

如果您有任何想法但无法进行测试：我可以测试任何更改，并在出现错误时将我看到的内容和控制台的记录发回。

Answer 1

自己发布答案，因为其他人可能也会遇到这个问题，并且那里没有太多信息。

有两个问题。我的 selectedCities 和 selectedStates 数组末尾有一个逗号。较新的浏览器不关心这一点，但

另外还有一个 VueJS 问题。有人更新了 Vue JS 以使用 IE 10 及以下不理解的新正则表达式字符串。解决方法是使用旧版本的 VueJS 或替换正则表达式。我在哪里找到此信息的来源说明：

https://github.com/vuejs/vue/issues/7946#issuecomment-393713941