如何在 Node.js 中记录 JSON 对象的内容？

Question

Is it possible to print an objects contents eg methods and attributes in Node.js?

At the moment I'm trying to print the session object and get the following:

console.log("Session:" + session);
> Session:[object Object]

Maybe in a similar way to print_r(array) in PHP, or using .toString in Java.

Answer 1

Try this one:

console.log("Session: %j", session);

If the object could be converted into JSON, that will work.

Answer 2

function prettyJSON(obj) {
    console.log(JSON.stringify(obj, null, 2));
}

// obj -> value to convert to a JSON string
// null -> (do nothing)
// 2 -> 2 spaces per indent level

JSON.stringify on MDN

Answer 3

为了得到更类似于原始console.log(obj)的输出，我通常使用console.log('Status: ' + util.inspect(obj)) （JSON 略有不同）。

Answer 4

This will work with any object:

    var util = require("util");
    console.log(util.inspect(myObject, {showHidden: false, depth: null}));

Answer 5

console.dir() 是最直接的方法。

Answer 6

console.log(obj);

运行：节点 app.js > output.txt

Answer 7

This will for most of the objects for outputting in nodejs console

 var util = require('util') function print (data){ console.log(util.inspect(data,true,12,true)) } print({name : "Your name" ,age : "Your age"})

Answer 8

console.dir with the depth argument set will do the trick. This will print JSON objects to any arbitrary depth. Depth:null means print every level.

console.dir(someObject, { depth: null })