[英]JavaScript/JSON: Get unknown property of an object
If I have a JSON object like this:如果我有这样的 JSON object:
{
"message": {
"name": { "stringLengthTooShort": "blub" }
}
}
The name of the property (here) stringLengthTooShort
is changing every time, how could I simply just get the child property of name
with JS?属性的名称(这里)
stringLengthTooShort
每次都在变化,我怎么能简单地用JS 获取name
的子属性呢? At the moment I have message.name
but how could I get now the child of it?目前我有
message.name
但我现在怎么才能得到它的孩子呢?
if it's always the first property of message.name
, you could do something like:如果它始终是
message.name
的第一个属性,您可以执行以下操作:
var keys = [];
for (var l in message.name) {
if (message.name.hasOwnProperty(l)){
keys.push(l);
}
}
//=>first property value should now be in message.name[keys[0]]);
// (its label is keys[0])
Edit : nine years after this answer all modern browsers support es20xx, so it's safe to use:编辑:这个答案九年后,所有现代浏览器都支持 es20xx,所以可以安全使用:
const obj = { "message": { "name": { "stringLengthTooShort": "blub" } } }; console.log(Object.keys(obj.message.name)[0]);
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