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Json is not javascript;json is a lightweight data exchange format, while javascript is a lightweight, interpretive or just-in-time programming language with function priority; json format is evolved from JavaScript objects, it is a subset of JavaScript.

This article operating environment: windows7 system, javascript1.8.5 version, Dell G3 computer.

Is json javascript?

Json is not javascript.

JSON (JavaScript Object Notation) is a lightweight data exchange format, JSON format data, mainly for cross-platform exchange of data. JavaScript (JS for short) is a lightweight, interpretive or just-in-time programming language with function priority.

But JSON does have a relationship with JavaScript, and it can be said that this data format evolved from the JavaScript object, which is a subset of JavaScript. JSON itself means JavaScript object representation (JavaScript Object Notation), which uses strict JavaScript object representation to represent structured data.

It is a strict js object format. The attribute name of JSON must have double quotation marks. If the value is a string, it must also be double quotation marks.

JSON is only a kind of data format (or data form), data format is actually a kind of specification, format, form, specification can not be used to store data. We cannot call the following objects JSON, such as:

Var obj2= {}; / / this is just the JS object var obj3= {width:100,height:200}; / * this has nothing to do with JSON, but the object of JS * / var obj4= {'width':100,'height':200}; / * it has nothing to do with JSON, but the object of JS * / var obj5= {"width": 100,200 "height": 200," name ":" rose "} / * We can call this a JavaScript object in JSON format * / var str1=' {"width": 100,200 "height", "name": "rose"}' / * We can call this a string in JSON format * / var a = [{"width": 100,200, "name": "rose"}, {"width": 100,200, "height": 200," name ":" rose "}, {" width ": 100,200," height ": 200," name ":" rose "},] / * this array is called JSON format Is a slightly more complex form of JSON * / var str2=' ['+'{"width": 100," height ": 200," name": "rose"},'+'{"width": 100,200, "name": "rose"},'+'{"width": 100,200, "height": 200, "name": "rose"},'+']' / * this is called a slightly more complex string in JSON format * /

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