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Chrome viewport size

Website testing has become increasingly complex. The days of checking functionality in a couple of browsers are long gone. Your latest masterpiece must be rigorously evaluated on a range of mobile, tablet and desktop devices with differing OSs, screen resolutions and capabilities.

In extreme cases, it could take as long as the original development. The process is complicated further by touch-screens, hybrid devices, and high-density displays. But how can you test your system during development and avoid the pain of running and switching between multiple devices?

Tab Resize 2.0 [split screen layouts] - Chrome Extension Demo

Fortunately, all modern browsers offer mobile emulation tools and one of the best can be found in Chrome. It can help identify early problems without leaving the comfort of your PC and development environment. You can now enable the browser emulator by clicking the Toggle device toolbar icon in the top-left:.

The dimensions of the emulated screen can be changed when Responsive is selected as the device type. This will react to touch-based JavaScript events such as touchstarttouchmove and touchend. Mouse-specific events and CSS effects should not occur. The default controls are:. The bar below the toolbar shows a range of typical phone, tablet and device sizes. This can be clicked when Responsive is chosen as the device to set that width.

Simulate Mobile Devices with Device Mode in Chrome DevTools

Select Show media queries from the three-dot menu to view a graphical color-coded representation of all media queries set in the CSS.

The drop-down menu on the left allows you to select a device. Several dozen presets are provided for popular smart phones and tablets including iPhones, iPads, Kindles, Nexus tablets, Samsung Galaxy, etc. Not all devices are presented at once — choose Edit… at the bottom of the device drop-down or select Settings from the Developer Tools menu F1 and choose the Devices tab:.

Note that all browsers identify themselves with a user agent string sent with all HTTP headers. This can be examined on the client or server-side and, during the dark days of web development, would be used to modify or provide a different user experience.Apr Posted by Sarah Maddox.

After doing a bit of searching and experimenting, I found that you can do it nicely with Chrome Developer Tools.

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This is handy, because Developer Tools are a standard part of the browser. The Chrome Developer Tools panel opens in your browser. By default, it opens either at the right-hand side or at the bottom of your browser window. It can also open as an independent window. I have mine set to open at the bottom.

Posted on 16 Aprilin technical writing and tagged Chrome developer toolsscreenshotswindow size. Bookmark the permalink. This is so helpful — no more wasting time resizing my browser manually or stretching my screenshots! Thanks for posting. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email.

Notify me of new posts via email. This site uses Akismet to reduce spam. Learn how your comment data is processed. This blog expresses my own opinions and ideas. They're not necessarily the same as those of the company I work for. Skip to navigation Skip to main content Skip to primary sidebar Skip to secondary sidebar Skip to footer ffeathers A technical writing and fiction blog by Sarah Maddox.

In short Open Chrome Developer Tools. Click the Toggle Device Mode option near top left of the developer tools section. Edit the dimensions, which are also at the top of screen, right next to the dropdown. The longer version The screenshots show Chrome version Open Chrome Developer Tools.

Edit the dimensions, which are also at the top of screen. Happy screenshotting! Like this: Like Loading About Sarah Maddox Technical writer, author and blogger in Sydney. Leave a comment Comments 2.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Already on GitHub? Sign in to your account. To add more salt into it, opening devtools will make the viewport lose the predefined size. For example. Why would you need to change the window size? Thanks, guys!!! I combined akylkb with Mehuge and got the perfect solution! And fwiw, for people who didn't understand why viewport size is important.

The entire DOM and navigation path can be completely different depending on how many different responsive designs the website designers have in place; they could have several, from smart watches to mobile, to ipads and tablets, touch screens and kiosks as well.

The world includes much, much more than just laptops and pcs, and each and every layout will have a completely different DOM structure. Think this is actually a bug when connecting over a websocket as I can't find a way to set the window size when on web socket. This means that some sites render incorrectly as they seem to look at the window size and not that set viewport, i. Hi, thx guys for solutions, but screen. Any suggestions to solve this other than manually do it so in evaluate method?

When saving as PDF have to use headless modethe window size triggers the incorrect media query. For example, if page. Will expect the DIV has a gray background.Device Mode is the name for the loose collection of features in Chrome DevTools that help you simulate mobile devices. These features include:. Think of Device Mode as a first-order approximation of how your page looks and feels on a mobile device. With Device Mode you don't actually run your code on a mobile device.

You simulate the mobile user experience from your laptop or desktop. There are some aspects of mobile devices that DevTools will never be able to simulate. When in doubt, your best bet is to actually run your page on a mobile device.

Use Remote Debugging to view, change, debug, and profile a page's code from your laptop or desktop while it actually runs on a mobile device. Drag the handles to resize the viewport to whatever dimensions you need. Or, enter specific values in the width and height boxes. In Figure 2the width is set to and the height is set to To show media query breakpoints above your viewport, click More options and then select Show media queries.

The table below describes the differences between the options.

Viewport Dimensions

Rendering method refers to whether Chrome renders the page as a mobile or desktop viewport. Cursor icon refers to what type of cursor you see when you hover over the page. Events fired refers to whether the page fires touch or click events when you interact with the page. To simulate the dimensions of a specific mobile device, select the device from the Device list. Click Rotate to rotate the viewport to landscape orientation.

Note that the Rotate button disappears if your Device Toolbar is narrow. When simulating the dimensions of a specific mobile device like an iPhone 6, open More options and then select Show device frame to show the physical device frame around the viewport.

Figure Selecting Edit. Enter a name, width, and height for the device. The device pixel ratiouser agent stringand device type fields are optional. The device type field is the list that is set to Mobile by default.

Creating a custom device. Click More options and then select Show rulers to see rulers above and to the left of your viewport.

The sizing unit of the rulers is pixels. Mid-tier mobile simulates fast 3G and throttles your CPU so that it is 4 times slower than normal. Low-end mobile simulates slow 3G and throttles your CPU 6 times slower than normal.

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Keep in mind that the throttling is relative to the normal capability of your laptop or desktop. Note that the Throttle list will be hidden if your Device Toolbar is narrow.Learn Development at Frontend Masters. Viewport units have always been controversial and some of that is because of how mobile browsers have made things more complicated by having their own opinions about how to implement them.

Case in point: should the scrollbar be taken into account for the vw unit? Then there are physical attributes of the devices themselves hello, notch! The spec is pretty vague about how viewport units should be calculated. So yeah, no clear guidance there when it comes to handling device and browser-specific differentiations.

Once you get past a piece of the browser interface, like the address bar, the vh value would update and the result was an awkward jump in the content. Safari for iOS was one of the first mobile browsers to update their implementation by choosing to define a fixed value for the vh based on the maximum height of the screen.

By doing so, the user would not experience jumps on the page once the address bar went out of view. As of this writing, there is a ticket to address this in Firefox Android. While using a fixed value is nice, it also means that you cannot have a full-height element if the address bar is in view. The bottom of your element will be cropped. The idea struck me that CSS Custom Properties and a few lines of JavaScript might be the perfect way to get the consistent and correct sizing I needed.

In JavaScript, you can always get the value of the current viewport by using the global variable window. The trick is to store the viewport value in a CSS variable and apply that to the element instead of the vh unit. That means we will want to apply it in our CSS like this:. As a result, we can now use --vh as our height value like we would any other vh unit, multiply it by and we have the full height we want.

Go ahead and try resizing the demo above. We can update the value of --vh by listening to the window resize event. This is handy in case the user rotates the device screen, like from landscape to portrait, or the navigation moves out of view on scroll. For example, this comes up a lot with ::focus.

Easily display the viewport size of your page (for responsive designs)

Frontend Masters is the best place to get it. Thank you very much will try this to fix my website soon.

chrome viewport size

Could you elaborate your use case? You need an in-flow full-height element at the top of the page? Apparently, some users will assume that there is no content below. But the concept is the same.

Add a. This is not really mentioned in the article but CSS Custom Properties can have fallback if the property is not defined. This gets rid of the default behaviour. To me it looks like the issue you are having is caused by it. Can you check this live demo on your mobile and let me know what you see? Here is a screenshot from Chrome on Mobile. As you can see vh refers to the screen without the interface. Louis, please ignore my first comment, after looking into issue myself I have discovered more than I had hoped for.

I always assumed that viewport height would be.

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Not the the mess it actually is. So I have been researching a bit.

chrome viewport size

Meanwhile I made a little demo which seems to work fine, sort of… Ill try to use orientationchange event listener to handle the change of orientation and manually adjust height of pages which are below first 2 screen heights, because the URL bar will be always hidden at that point.But then the site is allot bigger then my screen?

I played with: device-width, initial-scale, maximum-scale and nothing helps. Why is the site bigger then the screen if i set device-width? This varies by device but effectively means that your site will be scaled to fit and thus not at its correct size. If you are not specifically catering for mobile only then omit the viewport meta tag and let the device make a best guess. That is the resolution of your device and its probably double density which would equate to a viewport size of px xpx.

You should not be designing for a specific width as there are too many devices to cater for.

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What you want is a site that fits the screen no matter the size and you do this by creating fluid not fixed width sites and making sure the content fits. You can do this all on the desktop by simply opening and closing the width of the browsers and checking your design. You need a fluid width or a max-width and then create elements that can stretch or shrink as much as possible. You should never disable zoom unless you have built a purpose made app and used large text sizes all the way through.

As a rule of thumb never mess with users expectations and zoom is one of the most important. I cannot use any mobile unless I can zoom the text. So to recap. Do not set fixed widths on your layout. If you have chrome them call up the devtools and click the mobile icon at the top and then you can select various phones from a dropdown and see the real size that they render at.

Thanks Paul, i will look into it. If it would be a website or app then sure i would not make it fixed and disable zoom. You will need to find out what the device supports exactly.

Viewport Resizer – Responsive Testing Tool

If you set an explicit width and the device is double density then it will be too big. Is it ppi what we are talking about? On a desktop x is what it is. If i make something that big it exactly fills the screen. Is there somewhere an explanation out there in the www? If i look for viewport then all i get is what you should put in the header put no technical explanation.

chrome viewport size

Hm you wrote a Iphone 6 plus shows only x Yes on most desktops the resolution matches the available width but not on all as some laptops and the imac have double density displays but map them to device independent pixels. These are old articlea but explains the original concept. The point being that in order for content to look good on small devices you need to squeeze more device pixels into a standard css pixel and thus images optimised for the higher display will display much better.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. What steps will reproduce the problem? Please include code that reproduces the issue. What is the expected result? What happens instead? If you don't like the behavior and want viewport to match the window size, you should launch chrome with defaultViewport: null option.

Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. New issue. Jump to bottom. Copy link Quote reply. Steps to reproduce Tell us about your environment: Puppeteer version: Google Chrome This comment has been minimized. Sign in to view. Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment. Linked pull requests. You signed in with another tab or window.

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