What does bootstrap in css mean?

bootstrap refers to a simple, intuitive, and powerful front-end development framework from Twitter based on HTML, CSS, and JavaScript; it supports Sass variables and mixins, responsive grid systems, and comes with a large number of components and numerous Powerful JavaScript plugin.

The operating environment of this tutorial: windows7 system, CSS3&&bootstrap4 version, Dell G3 computer.

Bootstrap is a simple, intuitive, and powerful front-end development framework based on HTML, CSS, and JavaScript developed by designers Mark Otto and Jacob Thornton of Twitter Company in the United States, making Web development faster.

Official website: http://getbootstrap.com/

Github: https://github.com/twbs/bootstrap/

Bootstrap Yes The world's most popular front-end open source tool library, it supports Sass variables and mixins, responsive grid systems, comes with a large number of components and many powerful JavaScript plug-ins. Based on the powerful functions provided by Bootstrap, you can quickly design and customize your website.

Included content

Basic structure: Bootstrap provides a basic structure with a grid system, link styles, and background. This will be explained in detail in the Bootstrap basic structure section.

CSS: Bootstrap comes with the following features: global CSS settings, defining basic HTML element styles, extensible classes, and an advanced grid system. This will be explained in detail in the Bootstrap CSS section.

Components: Bootstrap contains more than a dozen reusable components for creating images, drop-down menus, navigation, alert boxes, pop-up boxes, and more. This will be explained in detail in the Layout Components section.

JavaScript plug-ins: Bootstrap includes more than a dozen custom jQuery plug-ins. You can include all plugins directly or include them individually. This will be explained in detail in the Bootstrap plugin section.

Customization: You can customize Bootstrap components, LESS variables and jQuery plugins to get your own version.

Supported components

Bootstrap contains a wealth of Web components. Based on these components, you can quickly build a beautiful and fully functional website, including the following components:

Drop-down menu, button group, button drop-down menu, navigation, navigation bar, path navigation, paging, layout, thumbnails, warning dialog box, progress bar, media object, etc.

Support plug-ins

Bootstrap comes with 13 jQuery plug-ins, which give "life" to components in Bootstrap. These include:

Modal dialog boxes, tabs, scroll bars, pop-up boxes, etc.

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