remark-github-blockquote-alert
Advanced tools
Alerts are a Markdown extension based on the blockquote syntax that you can use to emphasize critical information.
Remark plugin to add support for GitHub Alert
Alerts are a Markdown extension based on the blockquote syntax that you can use to emphasize critical information.
This package is ESM only: Node 12+ is needed to use it and it must be import instead of require.
npm install remark-github-blockquote-alert
import { remarkAlert } from 'remark-github-blockquote-alert'
let markdown = `# Alert \n> [!NOTE] \n> test`;
const htmlStr = remark()
.use(remarkParse)
.use(remarkAlert)
.use(remarkRehype)
.use(rehypeStringify)
.processSync(markdown).toString()
The output HTML will be:
<h1>Alert</h1>
<div class="markdown-alert markdown-alert-note" dir="auto">
<p class="markdown-alert-title" dir="auto"><svg class="octicon" viewBox="0 0 16 16" width="16" height="16" aria-hidden="true"><path d="M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg>NOTE</p>
<p>Useful information that users should know, even when skimming content.</p>
</div>
Change the expression [!NOTE] to [!NOTE/笔记]
let markdown = `# Alert \n> [!NOTE/笔记] \n> test`;
const htmlStr = remark()
.use(remarkParse)
.use(remarkAlert, { legacyTitle: true })
.use(remarkRehype)
.use(rehypeStringify)
.processSync(markdown).toString()
The output HTML will be:
<h1>笔记</h1>
<div class="markdown-alert markdown-alert-note" dir="auto">
<p class="markdown-alert-title" dir="auto"><svg class="octicon" viewBox="0 0 16 16" width="16" height="16" aria-hidden="true"><path d="M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg>NOTE</p>
<p>Useful information that users should know, even when skimming content.</p>
</div>
let markdown = `> [!CAUTION] \n> Hello World`;
const htmlStr = remark()
.use(remarkParse)
.use(remarkAlert, { tagName: "blockquote" })
.use(remarkRehype)
.use(rehypeStringify)
.processSync(markdown).toString()
The output HTML will be:
<blockquote class="markdown-alert markdown-alert-caution" dir="auto">
<p class="markdown-alert-title" dir="auto"><svg class="octicon" viewBox="0 0 16 16" width="16" height="16" aria-hidden="true"><path d="M4.47.22A.749.749 0 0 1 5 0h6c.199 0 .389.079.53.22l4.25 4.25c.141.14.22.331.22.53v6a.749.749 0 0 1-.22.53l-4.25 4.25A.749.749 0 0 1 11 16H5a.749.749 0 0 1-.53-.22L.22 11.53A.749.749 0 0 1 0 11V5c0-.199.079-.389.22-.53Zm.84 1.28L1.5 5.31v5.38l3.81 3.81h5.38l3.81-3.81V5.31L10.69 1.5ZM8 4a.75.75 0 0 1 .75.75v3.5a.75.75 0 0 1-1.5 0v-3.5A.75.75 0 0 1 8 4Zm0 8a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg>CAUTION</p>
<p>Hello World</p>
</blockquote>
You can mimic GitHub's alert style by adding the styles provided in the npm package to your CSS.
import 'remark-github-blockquote-alert/alert.css'
Or, add the following styles to your CSS to mimic GitHub's alert style:
@media (prefers-color-scheme: dark) {
.markdown-alert {
--color-border-default: #30363d;
--color-accent-fg: #58a6ff;
--color-accent-emphasis: #1f6feb;
--color-danger-fg: #f85149;
--color-danger-emphasis: #da3633;
--color-attention-fg: #d29922;
--color-attention-emphasis: #9e6a03;
--color-done-fg: #a371f7;
--color-done-emphasis: #8957e5;
--color-success-fg: #3fb950;
--color-success-emphasis: #238636;
}
}
@media (prefers-color-scheme: light) {
.markdown-alert {
--color-border-default: #d0d7de;
--color-accent-fg: #0969da;
--color-accent-emphasis: #0969da;
--color-danger-fg: #d1242f;
--color-danger-emphasis: #cf222e;
--color-attention-fg: #9a6700;
--color-attention-emphasis: #9a6700;
--color-done-fg: #8250df;
--color-done-emphasis: #8250df;
--color-success-fg: #1a7f37;
--color-success-emphasis: #1f883d;
}
}
.markdown-alert {
border-left: .25em solid var(--borderColor-default, var(--color-border-default));
color: inherit;
margin-bottom: 16px;
padding: .5rem 1em
}
.markdown-alert>:last-child {
margin-bottom: 0!important
}
.markdown-alert .markdown-alert-title {
align-items: center;
display: flex;
font-size: 14px;
font-weight: 500;
line-height: 1
}
.markdown-alert .markdown-alert-title svg.octicon {
margin-right: 8px!important;
margin-right: var(--base-size-8,8px) !important;
fill: currentColor;
}
.markdown-alert.markdown-alert-note {
border-left-color: var(--borderColor-accent-emphasis,var(--color-accent-emphasis))
}
.markdown-alert.markdown-alert-note .markdown-alert-title {
color: var(--color-accent-fg);
color: var(--fgColor-accent,var(--color-accent-fg))
}
.markdown-alert.markdown-alert-tip {
border-left-color: var(--borderColor-success-emphasis,var(--color-success-emphasis))
}
.markdown-alert.markdown-alert-tip .markdown-alert-title {
color: var(--color-success-fg);
color: var(--fgColor-success,var(--color-success-fg))
}
.markdown-alert.markdown-alert-important {
border-left-color: var(--borderColor-done-emphasis,var(--color-done-emphasis))
}
.markdown-alert.markdown-alert-important .markdown-alert-title {
color: var(--color-done-fg);
color: var(--fgColor-done,var(--color-done-fg))
}
.markdown-alert.markdown-alert-warning {
border-left-color: var(--borderColor-attention-emphasis,var(--color-attention-emphasis))
}
.markdown-alert.markdown-alert-warning .markdown-alert-title {
color: var(--color-attention-fg);
color: var(--fgColor-attention,var(--color-attention-fg))
}
.markdown-alert.markdown-alert-caution {
border-left-color: var(--borderColor-danger-emphasis,var(--color-danger-emphasis))
}
.markdown-alert.markdown-alert-caution .markdown-alert-title {
color: var(--color-danger-fg);
color: var(--fgColor-danger,var(--color-danger-fg))
}
To add an alert, use a special blockquote line specifying the alert type, followed by the alert information in a standard blockquote. Five types of alerts are available:
> [!NOTE]
> Useful information that users should know, even when skimming content.
> [!TIP]
> Helpful advice for doing things better or more easily.
> [!IMPORTANT]
> Key information users need to know to achieve their goal.
> [!WARNING]
> Urgent info that needs immediate user attention to avoid problems.
> [!CAUTION]
> Advises about risks or negative outcomes of certain actions.
Here are the rendered alerts:
[!NOTE]
Useful information that users should know, even when skimming content.
[!TIP]
Helpful advice for doing things better or more easily.
[!IMPORTANT]
Key information users need to know to achieve their goal.
[!WARNING]
Urgent info that needs immediate user attention to avoid problems.
[!CAUTION]
Advises about risks or negative outcomes of certain actions.
rehype-rewrite Rewrite element with rehype.rehype-video Add improved video syntax: links to .mp4 and .mov turn into videos.rehype-attr New syntax to add attributes to Markdown.rehype-ignore Ignore content display via HTML comments, Shown in GitHub readme, excluded in HTML.As always, thanks to our amazing contributors!
Made with contributors.
MIT © Kenny Wong
FAQs
Alerts are a Markdown extension based on the blockquote syntax that you can use to emphasize critical information.
We found that remark-github-blockquote-alert demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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