javascript - 如何将 console.log 写入文件

Question

现在我使用以下方式显示信息:

console.log (kraken.id, markets)

但是，我想将所有进入控制台的信息写入一个文件。如何通过完成以下代码来完成此操作？

'use strict';
var ccxt = require('ccxt');

(async () => {
  let kraken = new ccxt.kraken()
  let markets = await kraken.load_markets()
  //console.log (kraken.id, markets)


  //How to write above console.log to file?
  const fs = require('fs');
  fs.writeFile("/Users/Andreas/Desktop/NODE/myproject/files/test.txt", "allinfoAsstring", function (err) {
    if (err) {
      return console.log(err);
    }

    console.log("The file was saved!");
  });
})()

Answer 1

您可以尝试从变量创建一个对象并将其格式化为 JSON 字符串。

/* ... */
const obj = {kraken, markets}

const fs = require('fs');
fs.writeFile("/Users/Andreas/Desktop/NODE/myproject/files/test.txt", JSON.stringify(obj), function(err) {
    if(err) {
        return console.log(err);
    }

    console.log("The file was saved!");
}); 

稍后，您可以通过运行从文件中检索值

fs.readFile('/Users/Andreas/Desktop/NODE/myproject/files/test.txt', 'utf8', function(err, data) {
	const obj = JSON.parse(data)

	console.log("The data from the file is: " + obj)
})