npm i rehype-truncateRehype truncate is a plugin for rehype that lets you truncate a hast.
import unified from "unified";
import html from "rehype-parse";
import rehypeTruncate from "rehype-truncate";
import stringify from "rehype-stringify";
const document = `
<html>
<head></head>
<body>
<h1>Hello, World.</h1>
<p>This is an example document to test html truncation.</p>
</body>
</html>
`;
const processedDocument = unified()
.use(html)
.use(rehypeTruncate, { maxChars: 50 })
.use(stringify)
.processSync(document).contents;
console.log(processedDocument);This results in the following:
<html>
<head></head>
<body>
<h1>Hello, World.</h1>
<p>This is an example…</p>
</body>
</html>You can configure rehype-truncate to ignore content inside certain tag names by using the ignoreTags options.
import unified from "unified";
import html from "rehype-parse";
import rehypeTruncate from "rehype-truncate";
import stringify from "rehype-stringify";
const document = `
<html>
<head></head>
<body>
<h1>Hello, World.</h1>
<p>This is an example document to test html truncation.</p>
<ul>
<li>List item 1</li>
<li>List item 2</li>
<li>List item 3</li>
<li>List item 4</li>
</ul>
<p>This example has a list that should get ignored by the truncation character count.</p>
</body>
</html>
`;
const processedDocument = unified()
.use(html)
.use(rehypeTruncate, { maxChars: 120, ignoreTags: ["ul"] })
.use(stringify)
.processSync(document).contents;
console.log(processedDocument);This results in the following:
<html>
<head></head>
<body>
<h1>Hello, World.</h1>
<p>This is an example document to test html truncation.</p>
<ul>
<li>List item 1</li>
<li>List item 2</li>
<li>List item 3</li>
<li>List item 4</li>
</ul>
<p>This example has a lis…</p>
</body>
</html>| Name | Type | Description |
|---|---|---|
disable |
boolean? |
Disable truncation and return the document as is. |
ellipses |
string? |
Specify a custom ellipses string (default "…"). |
ignoreTags |
string[]? |
Ignore contents of certain tag names. |
maxChars |
number |
The number of characters to truncate. |