mdast-util-find-and-replace

mdast utility to find and replace text in a tree.

Install

This package is ESM only: Node 12+ is needed to use it and it must be imported instead of required.

npm:

npm install mdast-util-find-and-replace

Use

import {u} from 'unist-builder'
import {inspect} from 'unist-util-inspect'
import {findAndReplace} from 'mdast-util-find-and-replace'

const tree = u('paragraph', [
  u('text', 'Some '),
  u('emphasis', [u('text', 'emphasis')]),
  u('text', ' and '),
  u('strong', [u('text', 'importance')]),
  u('text', '.')
])

findAndReplace(tree, 'and', 'or')

findAndReplace(tree, {emphasis: 'em', importance: 'strong'})

findAndReplace(tree, {
  Some: function ($0) {
    return u('link', {url: '//example.com#' + $0}, [u('text', $0)])
  }
})

console.log(inspect(tree))

Yields:

paragraph[8]
├─ link[1] [url="//example.com#Some"]
│  └─ text: "Some"
├─ text: " "
├─ emphasis[1]
│  └─ text: "em"
├─ text: " "
├─ text: "or"
├─ text: " "
├─ strong[1]
│  └─ text: "strong"
└─ text: "."

API

This package exports the following identifiers: findAndReplace. There is no default export.

findAndReplace(tree, find[, replace][, options])

Find and replace text in mdast trees. The algorithm searches the tree in preorder for complete values in Text nodes. Partial matches are not supported.

Signatures

• findAndReplace(tree, find, replace?[, options])
• findAndReplace(tree, search[, options])

Parameters

• tree (Node) — mdast tree
• find (string or RegExp) — Value to find and remove. When string, escaped and made into a global RegExp
• replace (string or Function) — Value to insert. When string, turned into a Text node. When Function, invoked with the results of calling RegExp.exec as arguments, in which case it can return a single or a list of Node, a string (which is wrapped in a Text node), or false to not replace
• search (Object or Array) — Perform multiple find-and-replaces. When Array, each entry is a tuple (Array) of a find (at 0) and replace (at 1). When Object, each key is a find (in string form) and each value is a replace
• options.ignore (Test, default: []) — Any unist-util-is compatible test.

Returns

The given, modified, tree.

Security

Use of mdast-util-find-and-replace does not involve hast or user content so there are no openings for cross-site scripting (XSS) attacks.

Related

• hast-util-find-and-replace — hast utility to find and replace text
• unist-util-select — select unist nodes with CSS-like selectors

Contribute

See contributing.md in syntax-tree/.github for ways to get started. See support.md for ways to get help.

This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.

License

MIT © Titus Wormer