How to convert javascript to json string
Apr 12, 2021 am 10:04 AM
How to convert javascript to json string: 1. Use the "eval()" method, syntax "eval("(" array name")")"; 2. Use "jquery.parseJSON()" Method, syntax "jquery.parseJSON(array name)".
The operating environment of this tutorial: Windows 7 system, JavaScript version 1.8.5, Dell G3 computer.
The first way: using the js function eval();
testJson=eval(testJson); is the wrong conversion method.
The correct conversion method requires adding (): testJson = eval("(" testJson ")");
eval() is very fast, but it can compile and execute any javaScript program, so there will be security issues. Using eval(). The source must be trustworthy. Need to use a more secure json parser. If the server does not strictly encode the json or if it does not strictly validate the input, it is possible to provide invalid json or contain dangerous scripts, execute the script in eval(), and release malicious code.
function ConvertToJsonForJs() {
//var testJson = "{ name: '小強(qiáng)', age: 16 }";(支持)
//var testJson = "{ 'name': '小強(qiáng)', 'age': 16 }";（支持）
var testJson = '{ "name": "小強(qiáng)", "age": 16 }';
//testJson=eval(testJson);//錯(cuò)誤的轉(zhuǎn)換方式
testJson = eval("(" + testJson + ")");
alert(testJson.name);
}The second way: using the jquery.parseJSON() method has relatively high requirements on the format of json and must comply with the json format
jquery.parseJSON()
function ConvertToJsonForJq() {
var testJson = '{ "name": "小強(qiáng)", "age": 16 }';
//'{ name: "小強(qiáng)", age: 16 }' (name沒(méi)有使用雙引號(hào)包裹)
//"{ 'name': "小強(qiáng)", 'age': 16 }"(name使用單引號(hào))
testJson = $.parseJSON(testJson);
alert(testJson.name);
}【Recommended learning: javascript video tutorial】
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