web前端框架bootstrap

# [Bootstrap](https://getbootstrap.com/) [](https://bootstrap-slack.herokuapp.com/)  [](https://www.npmjs.com/package/bootstrap) [](https://travis-ci.org/twbs/bootstrap) [](https://david-dm.org/twbs/bootstrap#info=devDependencies) [](https://www.nuget.org/packages/Bootstrap) Bootstrap is a sleek, intuitive, and powerful front-end framework for faster and easier web development, created by [Mark Otto](https://twitter.com/mdo) and [Jacob Thornton](https://twitter.com/fat), and maintained by the [core team](https://github.com/orgs/twbs/people) with the massive support and involvement of the community. To get started, check out <https://getbootstrap.com/>! ## Table of contents * [Quick start](#quick-start) * [Bugs and feature requests](#bugs-and-feature-requests) * [Documentation](#documentation) * [Contributing](#contributing) * [Community](#community) * [Versioning](#versioning) * [Creators](#creators) * [Thanks](#thanks) * [Copyright and license](#copyright-and-license) ## Quick start Several quick start options are available: * [Download the latest release](https://github.com/twbs/bootstrap/archive/v3.4.1.zip). * Clone the repo: `git clone https://github.com/twbs/bootstrap.git`. * Install with [Bower](https://bower.io/): `bower install bootstrap`. * Install with [npm](https://www.npmjs.com/): `npm install bootstrap@3`. * Install with [Meteor](https://www.meteor.com/): `meteor add twbs:bootstrap`. * Install with [Composer](https://getcomposer.org/): `composer require twbs/bootstrap`. Read the [Getting started page](https://getbootstrap.com/docs/3.4/getting-started/) for information on the framework contents, templates and examples, and more. ### What's included Within the download you'll find the following directories and files, logically grouping common assets and providing both compiled and minified variations. You'll see something like this: ``` bootstrap/ ├── css/ │ ├── bootstrap.css │ ├── bootstrap.css.map │ ├── bootstrap.min.css │ ├── bootstrap.min.css.map │ ├── bootstrap-theme.css │ ├── bootstrap-theme.css.map │ ├── bootstrap-theme.min.css │ └── bootstrap-theme.min.css.map ├── js/ │ ├── bootstrap.js │ └── bootstrap.min.js └── fonts/ ├── glyphicons-halflings-regular.eot ├── glyphicons-halflings-regular.svg ├── glyphicons-halflings-regular.ttf ├── glyphicons-halflings-regular.woff └── glyphicons-halflings-regular.woff2 ``` We provide compiled CSS and JS (`bootstrap.*`), as well as compiled and minified CSS and JS (`bootstrap.min.*`). CSS [source maps](https://developers.google.com/web/tools/chrome-devtools/javascript/source-maps) (`bootstrap.*.map`) are available for use with certain browsers' developer tools. Fonts from Glyphicons are included, as is the optional Bootstrap theme. ## Bugs and feature requests Have a bug or a feature request? Please first read the [issue guidelines](https://github.com/twbs/bootstrap/blob/master/CONTRIBUTING.md#using-the-issue-tracker) and search for existing and closed issues. If your problem or idea is not addressed yet, [please open a new issue](https://github.com/twbs/bootstrap/issues/new). Note that **feature requests must target [Bootstrap v4](https://github.com/twbs/bootstrap/tree/v4-dev),** because Bootstrap v3 is now in maintenance mode and is closed off to new features. This is so that we can focus our efforts on Bootstrap v4. ## Documentation Bootstrap's documentation, included in this repo in the root directory, is built with [Jekyll](https://jekyllrb.com/) and publicly hosted on GitHub Pages at <https://getbootstrap.com/>. The docs may also be run locally. ### Running documentation locally 1. If necessary, [install Jekyll](https://jekyllrb.com/docs/installation/) and other Ruby dependencies with `bundle install`. **Note for Windows users:** Read [this guide](https://jekyllrb.com/docs/installation/windows/) to get Jekyll up and running without problems. 2. From the root `/bootstrap` directory, run `bundle exec jekyll serve` in the command line. 4. Open `http://localhost:9001` in your browser, and voilà. Learn more about using Jekyll by reading its [documentation](https://jekyllrb.com/docs/). ### Documentation for previous releases Documentation for v2.3.2 has been made available for the time being at <https://getbootstrap.com/2.3.2/> while folks transition to Bootstrap 3. [Previous releases](https://github.com/twbs/bootstrap/releases) and their documentation are also available for download. ## Contributing Please read through our [contributing guidelines](https://github.com/twbs/bootstrap/blob/master/CONTRIBUTING.md). Included are directions for opening issues, coding standards, and notes on development. Moreover, if your pull request contains JavaScript patches or features, you must include [relevant unit tests](https://github.com/twbs/bootstrap/tree/master/js/tests). All HTML and CSS should conform to the [Code Guide](https://github.com/mdo/code-guide), maintained by [Mark Otto](https://github.com/mdo). **Bootstrap v3 is now closed off to new features.** It has gone into maintenance mode so that we can focus our efforts on [Bootstrap v4](https://github.com/twbs/bootstrap/tree/v4-dev), the future of the framework. Pull requests which add new features (rather than fix bugs) should target [Bootstrap v4 (the `v4-dev` git branch)](https://github.com/twbs/bootstrap/tree/v4-dev) instead. Editor preferences are available in the [editor config](https://github.com/twbs/bootstrap/blob/master/.editorconfig) for easy use in common text editors. Read more and download plugins at <https://editorconfig.org/>. ## Community Get updates on Bootstrap's development and chat with the project maintainers and community members. * Follow [@getbootstrap on Twitter](https://twitter.com/getbootstrap). * Read and subscribe to [The Official Bootstrap Blog](https://blog.getbootstrap.com/). * Join [the official Slack room](https://bootstrap-slack.herokuapp.com/). * Chat with fellow Bootstrappers in IRC. On the `irc.freenode.net` server, in the `##bootstrap` channel. * Implementation help may be found at Stack Overflow (tagged [`twitter-bootstrap-3`](https://stackoverflow.com/questions/tagged/twitter-bootstrap-3)). * Developers should use the keyword `bootstrap` on packages which modify or add to the functionality of Bootstrap when distributing through [npm](https://www.npmjs.com/search?q=keywords:bootstrap) or similar delivery mechanisms for maximum discoverability. ## Versioning For transparency into our release cycle and in striving to maintain backward compatibility, Bootstrap is maintained under [the Semantic Versioning guidelines](https://semver.org/). Sometimes we screw up, but we'll adhere to those rules whenever possible. See [the Releases section of our GitHub project](https://github.com/twbs/bootstrap/releases) for changelogs for each release version of Bootstrap. Release announcement posts on [the official Bootstrap blog](https://blog.getbootstrap.com/) contain summaries of the most noteworthy changes made in each release. ## Thanks <img src="https://live.browserstack.com/images/opensource/browserstack-logo.svg" alt="BrowserStack Logo" width="490" height="106"> Thanks to [BrowserStack](https://www.browserstack.com/) for providing the infrastructure that allows us to test in real browsers! ## Creators **Mark Otto** * <https://twitter.com/mdo> * <https://github.com/mdo> **Jacob Thornton** * <https://twitter.com/fat> * <https://gith