How to set default browser window size in Protractor/WebdriverJS

Question

For some reason when I run my tests at work the browser is maximized, but when I run them at home it only opens a browser window of about 50% width. This causes some discrepancies with scrolling down, etc., so I'd ideally like to have it open a browser window of the same size on every machine the tests are run on. What's the best way to do this?

(I've found some answers for other languages, but I haven't been able to adapt them to JavaScript)

Adding

browser.executeScript('window.moveTo(0,0);' +
    'window.resizeTo(screen.width, screen.height);');

does nothing (apparently window.moveTo and window.resizeTo are not supported by Google Chrome).

Haddad

I don't have an answer for you at this time, but I can tell you that window.moveTo and window.scrollTo are definitely supported by Chrome. – Illa

scrollTo works. But the others don't, at least not from what I can tell. Try typing it in the console...does nothing. – Haddad

At the risk of getting off-topic, here is a fiddle that illustrates window.moveTo and window.resizeTo. It works fine for me in Chrome. I don't know that you can resize the current window from the console in Chrome, but the fact that the resizeTo method is available there indicates Chrome supports it. – Illa

Ok, seems to be working for new windows that the browser opens with JS. But does not work with the current window, which is what I need. – Haddad

I don't have an answer either, but I would certainly question whether you're doing things right if your test is dependent on screen size or whether the browser is maximised - perhaps it makes sense to refactor your test to not have that dependency? – Lithea

My test is for whether or not things work and are visible in different responsive configurations, so I need to be able to control the window size for each test. – Haddad

start chrome browser with option --window-size=360,640 can help – Coatbridge

The docs for configuring Protractor sites.google.com/a/chromium.org/chromedriver/capabilities suggest capabilities.chromeOptions.args: "start-maximized" in the config file (see also peter.sh/experiments/chromium-command-line-switches ) – Milan

Answer 1

You can set the default browser size by running:

var width = 800;
var height = 600;
browser.driver.manage().window().setSize(width, height);

To maximize the browser window, run:

browser.driver.manage().window().maximize();

To set the position, run:

var x = 150;
var y = 100;
browser.driver.manage().window().setPosition(x, y);

If you get an error:

WebDriverError: unknown error: operation is unsupported with remote debugging

Operation not supported when using remote debugging Some WebDriver commands (e.g. resizing the browser window) require a Chrome extension to be loaded into the browser. ChromeDriver normally loads this "automation extension" every time it launches a new Chrome session.

However ChromeDriver can be instructed to connect to an existing Chrome session instead of launching a new one. This is done using 'debuggerAddress' in the Capabilities (aka ChromeOptions) object. Since the automation extension is only loaded at startup, there are some commands that ChromeDriver does not support when working with existing sessions through remote debugging.

If you see the error "operation not supported when using remote debugging", try rewriting the test so that it launches a new Chrome session. This can be done by removing 'debuggerAddress' from the Capabilities object.

Source: Operation not supported when using remote debugging

Conjoined

It's also possible to maximise the browser to the full screen size using browser.driver.manage().window().maximize(); – Docia

@BenSmith: I mentioned that since my initial answer :) – Vampire

If you want to have the same resolution for all of your tests, you can call the above in your protractor.conf.js file's onPrepare function. – Potamic

@BenSmith not sure why, but browser.driver.manage().window().maximize(); doesn't actually maximize the window for me. I just get a slightly larger window. I just end up specifying a width and height with the setSize() method – Faraday

.maximize doesn't seem to work when you go headless I suppose. I had to specify explicitly the size of the window – Pilliwinks

@AlexandrosSpyropoulos : it should work but you have to make sure that you're not running xvfb in some silly resolution. For e.g. by default it's 640x480. – Howling

How would you do to use the same sizes when forking? Do I have to set the size manually then again? – Loach

@Loach what do you mean by forking? – Vampire

@RăzvanPanda Oh sorry, I was refering to a Protractor (Angular testing framework) action. You can create new browser windows in Protractor by forking a new driver instance. It would be nice if you could specify some standard dimensions to always open new browser windows in. – Loach

That gives me WebDriverError: unknown error: operation is unsupported with remote debugging – Milan

@LeeGee Updated answer. – Vampire

Something seems to be missing after "If you get an error". – Boraginaceous

Answer 2

You can also use your config.js to set window size:

// config.js
specs: [
    ...
],
capabilities: {
    browserName: 'chrome',
    chromeOptions: {
        args: ['--window-size=800,600'] // THIS!
    }
}
// ....

Titicaca

you need remove double dash : args: ['window-size=800,600'] – Carbide

This works as expected for me WITH the double dash as shown in the answer. – Micelle

This also sets the browser sizes when running e2e scripts with the '--headless' args. Which is handy if menu gets shifted to mobile view. – Vulture

Answer 3

If the preferred method:

browser.driver.manage().window().maximize();

doesn't work for you (for example running Protractor tests in Xvfb), then you can also maximize window this way (protractor.conf.js):

onPrepare: function() {
    setTimeout(function() {
        browser.driver.executeScript(function() {
            return {
                width: window.screen.availWidth,
                height: window.screen.availHeight
            };
        }).then(function(result) {
            browser.driver.manage().window().setSize(result.width, result.height);
        });
    });
},

TypeScript version:

import {Config, browser} from "protractor";

export let config: Config = {
    ...
    onPrepare: () => {
        setTimeout(() => {
            browser.driver.executeScript<[number, number]>(() => {
                return [
                    window.screen.availWidth,
                    window.screen.availHeight
                ];
            }).then((result: [number, number]) => {
                browser.driver.manage().window().setSize(result[0], result[1]);
            });
        });
    }
};

Pennsylvania

best ideea with auto get max resolution, but you forgot setPosition(0, 0) so it will be exactly over the screen – Polymer

Hm, my browser already starts at position 0-0. But good point if someone need it. – Pennsylvania

mine starts at... 50,50 or something.. just saying :) – Polymer

it may depend on the OS, here it's Windows 8.1 run inside Hyper-V – Polymer

Answer 4

I simply added the code below in my protractor.conf.js file and it did work fine.

onPrepare: function() {
    var width = 1600;
    var height = 1200;
    browser.driver.manage().window().setSize(width, height);
},

What purpose does the setTimeout and executeScript serve in your answer? I struggle to find best practices in the protractor documentation...

To my mind, using directly maximize() is a bad idea and should not be the preferred method, since it would not set the same size on every machine where the tests are executed and could break responsive behaviours.

Traditor

Answer 5

In Protractor.conf.js file add following configuration

capabilities: {
    'browserName': 'chrome',
    chromeOptions: {
      args: [
               'start-maximized'
            ]
    }
}

Rheometer

Answer 6

In Selenium 4 (Protractor 6), setRect replaces setSize and setPosition

For example,

browser.driver.manage().window().setRect({height: 600, width: 800});

Prader

Answer 7

Modify your config.js file as per below.

onPrepare: function () {
    browser.driver.manage().window().setSize(1280, 1024); // Width, height
},
capabilities: {
    browserName: 'chrome',
    chromeOptions: {
        args: [ "--start-maximized" ] // To start the browser as maximixed
    }
},

Pupa

Answer 8

if you want to go with async/await

You can maximize the window globally (once the browser started) like so

// protractor.conf.js

exports.config = {

    async onPrepare() {
        // start browser in specified window size
        await browser.driver
            .manage()
            .window()
            .setSize(1920, 1080);
    },
}

Tacmahack

Answer 9

Add the below code. This will maximize the browser window.

browser.driver.manage().window().maximize();

Scissure

Welcome to stackoverflow. There are already answers that provide this information with much more explanation. Please ensure your answers add something new to the question. – Universalist