在 JavaScript 中将 json 对象写入 .json 文件

Question

var proj = {
    Name : "abc",
    Roll no : 123
};

How can I write proj data in JSON format in.json file in javascript?

Answer 1

You can save the json object in file.json file like this.

const FileSystem = require("fs");
 FileSystem.writeFile('file.json', JSON.stringify(proj), (error) => {
    if (error) throw error;
  });

Answer 2

JSON.stringify (introduced in ES 5.1) will convert the object into a string of JSON.

var json = JSON.stringify(proj);

JavaScript has no built-in mechanism for writing to a file. You generally need something non-standard provided by the host environment. For example, Node.js has the writeFile method of the File System module.

Answer 3

Pretty much the same as top answer but slightly simpler version I regularly use to help with debugging (prints out an object at a given point in the code without using a debugger):

require('fs').writeFile('file.json', JSON.stringify(proj), (error) => {
        if (error) {
            throw error;
        }
    });