javascript - 加载本地JSON文件(Loading local JSON file)

Question

I'm trying to load a local JSON file but it won't work.

(我正在尝试加载本地JSON文件，但无法正常工作。)

Here is my JavaScript code (using jQuery:

(这是我的JavaScript代码（使用jQuery：)

var json = $.getJSON("test.json");
var data = eval("(" +json.responseText + ")");
document.write(data["a"]);

The test.json file:

(test.json文件：)

{"a" : "b", "c" : "d"}

Nothing is displayed and Firebug tells me that data is undefined.

(什么都没有显示，Firebug告诉我数据未定义。)

In Firebug I can see json.responseText and it is good and valid, but it's strange when I copy the line:

(在Firebug中，我可以看到json.responseText ，它很好且有效，但是当我复制该行时很奇怪：)

 var data = eval("(" +json.responseText + ")");

in Firebug's console, it works and I can access data.

(在Firebug的控制台中，它可以正常工作，并且我可以访问数据。)

Anyone have a solution?

(有人有解决办法吗？)

  ask by Patrick Browne translate from so

Answer 1

$.getJSON is asynchronous so you should do:

($.getJSON是异步的，因此您应该执行以下操作：)

$.getJSON("test.json", function(json) {
    console.log(json); // this will show the info it in firebug console
});