如何使用JS从JSON字符串解析参数? [英] How to parse parameters from JSON String using JS?

问题描述

我正在尝试解析JSON字符串，但解析后的值是undefined.这是 jsfiddle

I'm trying to parse a JSON String , but the parsed value is undefined . Here is jsfiddle

    <input type="submit" onclick=testJSON() value="Test"/> 
    <div id = "result">Test </div> 

<script> 
    function testJSON() { 

    var jsonString = '{"param1":"123","param2":"XXX78","param3":"11378"}'; 

    document.getElementById("result").innerHTML = (JSON.parse(jsonString)).param2;

    } 
</script> 

推荐答案

代码运行正常-这里的问题在JSFiddle中，因为它被设置为仅在加载文档时运行JS代码，因此该功能无法正常运行.不注册-这是相关选项:

The code is working fine - the problem here is in JSFiddle, as it's set to just run the JS code when the document is loaded, so the function doesn't get registered - here's the relevant option:

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