jQuery AJAX GET 不适用于本地 JSON 文件?

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时间:2020-08-27 10:17:11  来源:igfitidea点击:

AJAX GET not working with local JSON file?

jqueryajaxlocal-files

提问by Xtian

I had a JSONP URL, that was pulling data and just switched to a local JSON file and now I am getting errors. I don't understand why it is not working with a local JSON file?

我有一个 JSONP URL,它正在提取数据并刚刚切换到本地 JSON 文件,现在出现错误。我不明白为什么它不能使用本地 JSON 文件?

<script type="text/javascript">
    $.ajax({
        type : 'GET',
        dataType : 'json',
        url: '/json/topics.json',
        success : function(data) {
            console.log(data); 
            var topics = [];
            $.each(data.results, function(index, obj){
                topics.push({
                    username: obj.TopicName,
                    mentions: obj.LastHourCount,
                    totalcount: obj.TotalCount,
                    daycount: obj.Last24HoursCount
                }); 
            });
            $('#leader').tmpl(topics).appendTo('#top3');
        } 
    });
</script>

In the console it is saying AJAX is a anonymous function for some reason? Any suggestions?

在控制台中它说 AJAX 出于某种原因是一个匿名函数?有什么建议?

采纳答案by jk.

$.ajaxis asynchronous and it looks like you are trying to change the DOM on page load, add

$.ajax是异步的,看起来您正在尝试在页面加载时更改 DOM,添加

async: false,

to your $.ajaxparameters. Note that it may slow down page load.

到你的$.ajax参数。请注意,它可能会减慢页面加载速度。

Example:

例子:

 $.ajax({
    type : 'GET',
    dataType : 'json',
    async: false,
    // rest of your code

See this post if you are using local files, not through webserver, and getting a Origin null is not allowed by Access-Control-Allow-Originerror:

如果您使用的是本地文件,而不是通过网络服务器,并且出现Origin null is not allowed by Access-Control-Allow-Origin错误,请参阅此帖子:

Error: "Origin null is not allowed by Access-Control-Allow-Origin" when loading an XML file with JQuery's ajax method

错误:使用 JQuery 的 ajax 方法加载 XML 文件时,“Access-Control-Allow-Origin 不允许使用 Origin null”