如何使用 node.js 获取屏幕分辨率

Question

I need get screen resolution with node.js, but the following code don't work.

var w = screen.width;
var h = screen.height;

This also don't work.

var w = window.screen.width;
var h = window.screen.height;

Someone know how to get screen resolution with node.js ? Thank you.

Answer 1

There is now a screenres module via npm:

https://www.npmjs.com/package/screenres

Answer 2

You should retrieve the window.screen.width and window.screen.height in your client-side JavaScript code and send that information to your server-side Node.js application via AJAX, WebSocket, as form data, etc.

For example:

(function(w) {
    $.ajax({
        type: 'POST',
        url: '/echo/json',
        data: {
            w: w.screen.width,
            h: w.screen.height
        },
        success: function() {
            console.log(arguments);
        },
        dataType: 'json'
    });
})(window);

This is common and is not related to the server-side technology. Doesn't matter what you use at the back-end (Node.js, Python, Ruby, PHP, Java, ASP.NET, etc.), you should send a data from client to server since the server doesn't deal with the user's browser directly.

Answer 3

I solved the problem with phantomJS .

Install phantomJS :

sudo apt-get install phantomjs

Create app.js file:

var w = screen.width;
var h = screen.height;

console.log(w+"x"+h);

phantom.exit();

Execute:

phantomjs app.js

Return:

1366x768

Answer 4

This is quite an overkill, but the node module I found doesn't work anymore and it doesn't handle multiple displays anyway:

npm install nightmare

And then if you want for exampnle the size and coordinates of the external monitor if available:

const getBounds = async () => {
  const nm = new Nightmare({
    webPreferences: {
      nodeIntegration: true,
    },
  });
  const bounds = nm
    .goto('about:blank')
    .evaluate(() => {
      const electron = require('electron');
      const displays = electron.screen.getAllDisplays()
      const display = displays.find((d) => d.bounds.x !== 0 || d.bounds.y !== 0) || displays[0];
      return display.bounds;
    }).end();
  return bounds;
};

Answer 5

Using screenz :

const { width, height } = require("screenz");

console.log(width);
//=> 1920

console.log(height);
//=> 1080