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diff --git a/site/content/docs/5.3/getting-started/download.md b/site/content/docs/5.3/getting-started/download.md index a1b8bfd..f813e48 100644 --- a/site/content/docs/5.3/getting-started/download.md +++ b/site/content/docs/5.3/getting-started/download.md @@ -50,6 +50,24 @@ If you're using our compiled JavaScript and prefer to include Popper separately, <script src="{{< param "cdn.js" >}}" integrity="{{< param "cdn.js_hash" >}}" crossorigin="anonymous"></script> ``` +### Alternative CDNs + +We recommend [jsDelivr](https://www.jsdelivr.com/) and use it ourselves in our documentation. However, in some cases—like in some specific countries or environments—you may need to use other CDN providers like [cdnjs](https://cdnjs.com/) or [unpkg](https://unpkg.com/). + +You'll find the same files on these CDN providers, albeit with different URLs. With cdnjs, you can [use this direct Bootstrap package link](https://cdnjs.com/libraries/bootstrap) to copy and paste ready-to-use HTML snippets for each dist file from any version of Bootstrap. + +{{< callout warning>}} +**If the SRI hashes differ for a given file, you shouldn't use the files from that CDN, because it means that the file was modified by someone else.** +{{< /callout >}} + +Note that you should compare same length hashes, e.g. `sha384` with `sha384`, otherwise it's expected for them to be different. +As such, you can use an online tool like [SRI Hash Generator](https://www.srihash.org/) to make sure that the hashes are the same for a given file. +Alternatively, assuming you have OpenSSL installed, you can achieve the same from the CLI, for example: + +```sh +openssl dgst -sha384 -binary bootstrap.min.js | openssl base64 -A +``` + ## Package managers Pull in Bootstrap's **source files** into nearly any project with some of the most popular package managers. No matter the package manager, Bootstrap will **require a [Sass compiler]({{< docsref "/getting-started/contribute#sass" >}}) and [Autoprefixer](https://github.com/postcss/autoprefixer)** for a setup that matches our official compiled versions. |