What is use of the viewport value in meta Tag in Bootstrap ?

The viewport meta tag in Bootstrap plays a pivotal role in ensuring proper scaling and responsiveness of web pages on various devices. It defines how the browser should handle the dimensions and scaling of the content based on the device’s screen size.

Syntax

<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

Explanation:

• width=device-width: Sets the width of the viewport to the width of the device.
• initial-scale=1.0: Sets the initial zoom level when the page is first loaded.
• shrink-to-fit=no: Prevents the webpage from shrinking to fit the screen, ensuring it maintains its intended width.

Usages:

• Responsive Scaling: The viewport meta tag ensures that the page width corresponds to the device width, promoting responsiveness.
• Initial Scale Setting: The initial-scale=1.0 attribute establishes the initial zoom level, preventing unnecessary zooming when the page loads.
• User Scalable Option: The user-scalable attribute allows or restricts user-initiated scaling, providing control over the zoom feature.
• Optimal Viewport Behavior: It helps in achieving optimal viewport behavior, enhancing the visual experience across a range of devices.