What is viewport in CSS

What is viewport height CSS?

There are four viewport-based units in CSS. These are vh , vw , vmin and vmax . Viewport Height (vh). … This unit is based on the smaller dimension of the viewport. If the viewport height is smaller than the width, the value of 1vmin will be equal to 1% of the viewport height.

What is viewport meta tag?

The viewport is the user’s visible area of a web page. It varies with the device – it will be smaller on a mobile phone than on a computer screen. You should include the following <meta> element in all your web pages: <meta name=”viewport” content=”width=device-width, initial-scale=1.0″>

What is 100vh in CSS?

height: 100vh = 100% of the viewport height. height: 100% = 100% of the parent’s element height. That is why you need to add height: 100% on html and body , as they don’t have a size by default.

What is VW and VH in CSS?

vw : hundredths of the viewport width. vh : hundredths of the viewport height. vmin : hundredths of whichever is smaller, the viewport width or height. vmax : hundredths of whichever is larger, the viewport width or height.

What Is REM in HTML?

For readers unfamiliar with the rem unit (standing for “root em”), it provides a way to specify lengths as fractions of the root element’s font size. In practical terms, this almost always means the font size of the <html> element.

What is strong in HTML?

The HTML Strong Importance Element ( <strong> ) indicates that its contents have strong importance, seriousness, or urgency. Browsers typically render the contents in bold type.

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How do you use metadata?

Best Practices to Write Effective Metadata

  1. Keep it concise. Meta titles need to be short but sweet – Google typically displays the first 50–60 characters of a title tag. …
  2. Include the focus keyword. …
  3. Include a call-to-action. …
  4. Match the title & description to your content. …
  5. Make sure they’re unique.

How do I add a meta viewport tag?

How to add a viewport meta tag #

  1. width=device-width sets the width of the viewport to the width of the device.
  2. initial-scale=1 sets the initial zoom level when the user visits the page.

Where do I put meta viewport tag?

Throw the viewport meta tag into your <head> , plus the @viewport rule into your CSS when you’re building flexible layouts and you’re good to go.

What is flex in HTML?

A flex container expands items to fill available free space or shrinks them to prevent overflow. Most importantly, the flexbox layout is direction-agnostic as opposed to the regular layouts (block which is vertically-based and inline which is horizontally-based).

What is Z index in CSS?

The z-index CSS property sets the z-order of a positioned element and its descendants or flex items. Overlapping elements with a larger z-index cover those with a smaller one.

What Is REM size in CSS?

rem values are relative to the root html element, not to the parent element. That is, If font-size of the root element is 16px then 1 rem = 16px for all elements. If font-size is not explicitly defined in root element then 1rem will be equal to the default font-size provided by the browser (usually 16px).

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How do you use VH CSS?

To use vh and vw values, just type “Nvh” or “Nvw” (where “N” represents the percentage of the viewport you’d like to cover) into any width or height field. So to cover 100% of the viewport, you’d set 100% for the width and 100vh for the height. To cover half of the viewport height, you’d set a height of 50vh.

What Is REM and EM in CSS?

rem : a CSS unit which is relative to the font size of the html element. em : a CSS unit which is relative to the font size of the parent element.programmist css

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