unist utility to find a node before another node.

npm:

npm install unist-util-find-before

var u = require('unist-builder')
var findBefore = require('unist-util-find-before')

var tree = u('tree', [
  u('leaf', 'leaf 1'),
  u('node', [u('leaf', 'leaf 2'), u('leaf', 'leaf 3')]),
  u('leaf', 'leaf 4'),
  u('node', [u('leaf', 'leaf 5')]),
  u('leaf', 'leaf 6'),
  u('void'),
  u('leaf', 'leaf 7')
])

var empty = tree.children[5]

console.log(findBefore(tree, empty, 'node'))

Yields:

{ type: 'node', children: [ { type: 'leaf', value: 'leaf 5' } ] }

Find the first child before index (or node) in parent, that passes test.

• parent (Node) — Parent node
• node (Node) — Child of parent
• index (number, optional) — Index in parent
• test (Function, string, Object, Array, optional) — See unist-util-is

Node? — Child of parent passing test.

• unist-util-find-after — Find a node after another node
• unist-util-find-all-after — Find all nodes after another node
• unist-util-find-all-before — Find all nodes before another node
• unist-util-find-all-between — Find all nodes between two nodes
• unist-util-find — Find nodes matching a predicate

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, organisation, or community you agree to abide by its terms.

MIT © Titus Wormer