blocks|key|4159490|text|编辑|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4159491|我在github上更新了your+JSON，并测试了XHR响应和解析的对象，以检查其正确性，我可以肯定地说它工作正常：|offset|length|4159492|​|4159493|function+readJson(){
var+rawFile+=+new+XMLHttpRequest();
rawFile.open("GET",+"https://raw.githubusercontent.com/crisz/file/master/file.json",+false);
rawFile.onreadystatechange+=+function+()
{
++++if(rawFile.readyState+===+4)
++++{
++++++++if(rawFile.status+===+200+%7C%7C+rawFile.status+===+0)
++++++++{
++++++++++++console.log(JSON.parse(rawFile.responseText));
++++++++}
++++}
};
rawFile.send(null);
//+return+JSON.parse(rawFile.responseText);
}

readJson();|code-block|syntax|javascript|4159494|4159495|在前面的回答中，我没有注意到异步函数内部的返回，如果你对异步函数在Javascript中是如何工作的有疑问，你可以查看this+answer。|4159496|老答案|4159497|您的JSON格式不正确。JSON+specification不希望在一个集合的最后一个键值的末尾有逗号。|4159498|去掉尾随的逗号，解析就能正常工作了：|4159499|{
"0":{
++++"poperty1":"poperty1",
++++"poperty2":"poperty2"
++++},
"1":{
++++"poperty1":"poperty1",
++++"poperty2":"poperty2"
++++},
"2":{
++++"poperty1":"poperty1",
++++"poperty2":"poperty2"
++++}
}|4159500|如果在生成的对象中删除逗号仍然存在问题，那么请尝试测试您的API端点，看看响应是否是您所期望的。|4159501|entityMap|0|LINK|mutability|MUTABLE|url|https://raw.githubusercontent.com/crisz/file/master/file.json|1|https://stackoverflow.com/questions/14220321/how-do-i-return-the-response-from-an-asynchronous-call/14220323#14220323|2|http://www.json.org/^0|0|C|9|0|0|0|0|0|1N|B|1|0|0|C|I|2|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1B|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1C|8|@]|9|@$D|1D|E|1E|1|1F]]|A|$]]|$1|F|3|G|5|6|7|1G|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|1H|8|@]|9|@]|A|$K|L]]|$1|M|3|G|5|6|7|1I|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1J|8|@]|9|@$D|1K|E|1L|1|1M]]|A|$]]|$1|P|3|Q|5|6|7|1N|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1O|8|@]|9|@$D|1P|E|1Q|1|1R]]|A|$]]|$1|T|3|U|5|6|7|1S|8|@]|9|@]|A|$]]|$1|V|3|W|5|J|7|1T|8|@]|9|@]|A|$K|L]]|$1|X|3|Y|5|6|7|1U|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|1V|8|@]|9|@]|A|$]]]|10|$11|$5|12|13|14|A|$15|16]]|17|$5|12|13|14|A|$15|18]]|19|$5|12|13|14|A|$15|1A]]]]

<h3>Edit</h3>

<p>I updated <a href="https://raw.githubusercontent.com/crisz/file/master/file.json" rel="nofollow noreferrer">your JSON</a> on github, and I tested both the XHR response and the parsed object, in order to check that is correct, and I can say for sure it works properly:</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>function readJson(){
var rawFile = new XMLHttpRequest();
rawFile.open("GET", "https://raw.githubusercontent.com/crisz/file/master/file.json", false);
rawFile.onreadystatechange = function ()
{
    if(rawFile.readyState === 4)
    {
        if(rawFile.status === 200 || rawFile.status === 0)
        {
            console.log(JSON.parse(rawFile.responseText));
        }
    }
};
rawFile.send(null);
// return JSON.parse(rawFile.responseText);
}

readJson();</code></pre>
</div>
</div>
</p>

<p>In the previous answer I hadn't notice the return inside the asynchronous function, if you have doubts about how asynchronous functions work in Javascript, you can check <a href="https://stackoverflow.com/questions/14220321/how-do-i-return-the-response-from-an-asynchronous-call/14220323#14220323">this answer</a>.  </p>

<h3>Old answer</h3>

<p>Your JSON is malformed. The <a href="http://www.json.org/" rel="nofollow noreferrer">JSON specification</a> doesn't expect a comma at the end of the last key-value of a set.</p>

<p>Remove the trailing commas, and the parsing will work:</p>

<pre><code>{
"0":{
    "poperty1":"poperty1",
    "poperty2":"poperty2"
    },
"1":{
    "poperty1":"poperty1",
    "poperty2":"poperty2"
    },
"2":{
    "poperty1":"poperty1",
    "poperty2":"poperty2"
    }
}
</code></pre>

<p>If also removing commas you have still problems in the resulting object, then try testing your API endpoint to see if the response is what you expect.</p>


<p>I have a Json file like this</p>

<pre><code>{
"0":{
    "poperty1":"poperty1",
    "poperty2":"poperty2",
    },
"1":{
    "poperty1":"poperty1",
    "poperty2":"poperty2",
    },
"2":{
    "poperty1":"poperty1",
    "poperty2":"poperty2",
    },
}
</code></pre>

<p>And i read it with this function:</p>

<pre><code>function readJson(){
var rawFile = new XMLHttpRequest();
rawFile.open("GET", "file.json", false);
rawFile.onreadystatechange = function ()
{
    if(rawFile.readyState === 4)
    {
        if(rawFile.status === 200 || rawFile.status === 0)
        {
            // console.log(JSON.parse(rawFile.responseText));
        }
    }
};
rawFile.send(null);
return JSON.parse(rawFile.responseText);
}
</code></pre>

<p>But it return every value exept the 0</p>

<pre><code>"1":{
    "poperty1":"poperty1",
    "poperty2":"poperty2",
    },
"2":{
    "poperty1":"poperty1",
    "poperty2":"poperty2",
    }
</code></pre>

<p>even if i removit and start the json with 1 it return the 1 as well.</p>

<p>so any idea why?</p>


JavaScript - Read Json if first value if is Zero

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个这样的Json文件{"0":{    "poperty1":"poperty1",    "poperty2":"poperty2",    },"1":{    "poperty1":"poperty1",    "poperty2":"poperty2",    },"2":{    "poperty1":...

JavaScript -如果第一个值为零，则读取Json-腾讯云开发者社区-腾讯云

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