javascript 向 JSON 字符串添加新属性
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Add new attribute to JSON string
提问by TheAlbear
What i can to do is extend my JSON object with a new attrubute.
我能做的是用新的属性扩展我的 JSON 对象。
E.g
例如
var jsonText = {
"Repeats": 1,
"Trials": 4,
"GroupName": "Mobile phones",
"targets": [
{
"name": "Apple",
},
{
"name": "Samsung",
}
]}
What I would like to end up with is the inclusion of a new item so extend the object so it then looks something like.
我想要结束的是包含一个新项目，以便扩展对象，使其看起来像。
var jsonText = {
"NewItem" : NewValue,
"Repeats": 1,
"Trials": 4,
"GroupName": "Mobile phones",
"targets": [
{
"name": "Apple",
},
{
"name": "Samsung",
}
]}
回答by James Allardice
You have a JavaScript object literal, not a JSON string. You can interact with it like a normal object literal:
您有一个 JavaScript 对象文字，而不是 JSON 字符串。你可以像普通的对象文字一样与它交互：
jsonText.NewItem = "NewValue";
If you did actually have a JSON string you could first parse it into a JavaScript object and then handle it in the same way, and then serialize it back into a JSON string. For example:
如果您确实有一个 JSON 字符串，您可以首先将它解析为一个 JavaScript 对象，然后以相同的方式处理它，然后将其序列化回一个 JSON 字符串。例如：
var jsonText = '{ "Repeats": 1, "Trials": 4 }',
actualObj = JSON.parse(jsonText);
actualObj.newItem = "New Value";
jsonText = JSON.stringify(actualObj);
