RWD Viewport

CSS Tutorial


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CSS Advanced


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CSS Responsive

CSS Grid

Responsive Web Design - The Viewport

What is The Viewport?

The viewport defines as the area that is visible to the area of a web page.

The viewport changes with the device, and is smaller on a mobile phone than on a computer screen.

Before tablets and mobile phones, web pages were designed specifically for computer screens, and web pages had a static design and a fixed size.

Then, with time surfing on the internet became common using tablets and mobile phones, fixed size web pages were too large to adjust the viewport. To fix this, browsers on those devices were scaled down the whole web page to adjust to the screen.

Setting The Viewport

HTML5 introduced a method that enabled the web designers to have control over the viewport, through the <meta> tag.

The following <meta> viewport  needs to be included element in all your web pages:

<meta name=”viewport” content=”width=device-width, initial-scale=1.0″>

This indicates the browser on how to control the page’s dimensions and scaling.

Size Content to The Viewport

Users scroll websites vertically on both desktop and mobile devices – but never horizontally.

So, if the user wants to scroll horizontally, or zoom out, to see the whole web page it results in a poor user experience.

Some additional rules to follow:

  1. Never use large fixed width elements – For example, if an image is viewed at a width wider than the viewport it’ll make the viewport to scroll horizontally. Set this content to fit inside the width of the viewport.
  2. Never allow the content to depend on a particular viewport width to render well – Since screen dimensions and width in CSS pixels change between devices, content must not depend on a particular viewport width to render well.
  3. Make use of CSS media queries to apply different styling for small and large screens – Adjusting large absolute CSS widths for page elements causes the element to be too wide for the viewport on a smaller device.

 


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