如何在“Mac 终端”中使用“console.log”和 NodeJS 中的命令行“Local heroku”显示多行？

Question

To launch my application,

when I use the command line : "node index.js" => my Mac Terminal displays all lines from an object.

When I use the command line : "heroku local" => my Mac Terminal displays just only one line from an object.

How can I display several lines on my Mac Terminal when I use "heroku local" ?

Thank you

Answer 1

So, this is only a guess here, but there may be a difference between versions of Node which is causing this behavioural change. Nonetheless, you can do a pretty-print in node using JSON.stringify:

var a = {foo: "baz", bar:{a: "b"}}
console.log(JSON.stringify(a, null, 4))

With any luck that will make them look the same. This is because JSON.stringify allows for a space formatting value as it's third parameter .

Also, for better object inspection util.inspect allows better rending of information about objects, nested to a arbitrary degree (and including better error meta info which seems to be lost in a lot of stringification.

var util = require('util');
var a = {foo: "baz", bar:{a: "b"}}
console.log(util.inspect(a));

However, I think util varies between nodeJS implementations, so you may see some variation. See here for the Node v5 implementation (latest at time of writing)