How to implement responsiveness in bootstrap

With the popularity of mobile devices, how to allow users to browse your website through mobile devices to obtain good visual effects has become an inevitable problem. Responsive web design is an effective way to achieve this.

#Responsive web design is a method that allows users to obtain good visual effects when browsing a website on devices of various sizes. (Recommended learning: Bootstrap video tutorial)

For example, you first browse a website on a computer monitor, and then browse on a smartphone. The screen size of the smartphone is much smaller than the computer monitor, but But you don’t feel any difference. The user experience of the two is almost the same, which shows that this website has done a good job in responsive design.

We have implemented responsiveness into our fluid layout and invite you to browse on different screen sizes. You can resize your browser with the Window Resize extension for Chrome or FireFox.

How responsive web design works

In order to apply responsive web design, you need to create a CSS that contains styles that adapt to various device sizes. Once a page is loaded on a specific device using various fonts and web development techniques such as media queries, the device's viewport size is first detected and device-specific styles are loaded.

You must add the following line of code to the head area of ​​the web page:

<meta>

The meta tag of the viewport overrides the default viewport and helps load Styles associated with a specific viewport.

width attribute sets the screen width. It contains a value such as 320 for 320 pixels, or 'device-width' to tell the browser to use the native resolution.

The initial-scale property is the initial scale of the viewport. When set to 1.0, the native width of the device is rendered.

Of course, you must add Bootstrap's responsive CSS, as shown below:

<link>

BootStrap's responsiveness is based on its grid system, by setting up different controls, such as col-(sm /md/ls/xl)-(1/2/3/4/5/6/7/8/9/10/11/12) to achieve different layout effects in different display areas and achieve responsiveness layout.

Explanation

In order to make the layout more responsive, Bootstrap does three things:

1. Modify the width of the columns in the grid .

2. Whenever necessary, it uses stack elements instead of floating elements. If you still don't know what a stack element is, the following form from w3.org may provide some help:

The root element (html) forms the root of the stack context, and other stack contexts are generated from arbitrarily positioned elements (Including relatively positioned elements, which have a calculated value of 'z-index' rather than 'auto'). The stack context is not required relative to the containing block.

3. Render the title and text correctly.

For more technical articles related to Bootstrap, please visit the Bootstrap Tutorial column to learn!

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