unist-util-is

WebJar for unist-util-is

License	MIT
GroupId	org.webjars.npm
ArtifactId	unist-util-is
Last Version	4.0.4
Release Date	Feb 2, 2021
Type	jar
Description	unist-util-is WebJar for unist-util-is
Project URL	https://www.webjars.org
Source Code Management	https://github.com/syntax-tree/unist-util-is

Download unist-util-is

Filename	Size
unist-util-is-4.0.4.pom
unist-util-is-4.0.4.jar	8 KB
unist-util-is-4.0.4-sources.jar	22 bytes
unist-util-is-4.0.4-javadoc.jar	22 bytes

How to add to project

Apache Maven

<!-- https://jarcasting.com/artifacts/org.webjars.npm/unist-util-is/ -->
<dependency>
    <groupId>org.webjars.npm</groupId>
    <artifactId>unist-util-is</artifactId>
    <version>4.0.4</version>
</dependency>

Gradle Groovy

// https://jarcasting.com/artifacts/org.webjars.npm/unist-util-is/
implementation 'org.webjars.npm:unist-util-is:4.0.4'

Gradle Kotlin

// https://jarcasting.com/artifacts/org.webjars.npm/unist-util-is/
implementation ("org.webjars.npm:unist-util-is:4.0.4")

Apache Buildr

'org.webjars.npm:unist-util-is:jar:4.0.4'

Apache Ivy

<dependency org="org.webjars.npm" name="unist-util-is" rev="4.0.4">
  <artifact name="unist-util-is" type="jar" />
</dependency>

Groovy Grape

@Grapes(
@Grab(group='org.webjars.npm', module='unist-util-is', version='4.0.4')
)

Scala SBT

libraryDependencies += "org.webjars.npm" % "unist-util-is" % "4.0.4"

Leiningen

[org.webjars.npm/unist-util-is "4.0.4"]

Dependencies

There are no dependencies for this project. It is a standalone project that does not depend on any other jars.

Project Modules

There are no modules declared in this project.

unist-util-is

unist utility to check if a node passes a test.

Install

npm:

npm install unist-util-is

Use

var is = require('unist-util-is')

var node = {type: 'strong'}
var parent = {type: 'paragraph', children: [node]}

function test(node, n) {
  return n === 5
}

is() // => false
is({children: []}) // => false
is(node) // => true
is(node, 'strong') // => true
is(node, 'emphasis') // => false

is(node, node) // => true
is(parent, {type: 'paragraph'}) // => true
is(parent, {type: 'strong'}) // => false

is(node, test) // => false
is(node, test, 4, parent) // => false
is(node, test, 5, parent) // => true

API

is(node[, test[, index, parent[, context]]])

Parameters

• node (Node) — Node to check.
• test (Function, string, Object, or Array.<Test>, optional) — When nullish, checks if node is a Node. When string, works like passing node => node.type === test. When array, checks if any one of the subtests pass. When object, checks that all keys in test are in node, and that they have strictly equal values
• index (number, optional) — Index of node in parent
• parent (Node, optional) — Parent of node
• context (*, optional) — Context object to invoke test with

Returns

boolean — Whether test passed and node is a Node (object with type set to a non-empty string).

function test(node[, index, parent])

Parameters

• node (Node) — Node to check
• index (number?) — Index of node in parent
• parent (Node?) — Parent of node

Context

* — The to is given context.

Returns

boolean? — Whether node matches.

is.convert(test)

Create a test function from test, that can later be called with a node, index, and parent. Useful if you’re going to test many nodes, for example when creating a utility where something else passes an is-compatible test.

The created function is slightly faster because it expects valid input only. Therefore, passing invalid input, yields unexpected results.

Can also be accessed with require('unist-util-is/convert').

For example:

var u = require('unist-builder')
var convert = require('unist-util-is/convert')

var test = convert('leaf')

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

var leafs = tree.children.filter((child, index) => test(child, index, tree))

console.log(leafs)

Yields:

[{type: 'leaf', value: '2'}, {type: 'leaf', value: '5'}]

Related

• unist-util-find-after — Find a node after another node
• unist-util-find-before — Find a node before 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-filter — Create a new tree with nodes that pass a check
• unist-util-remove — Remove nodes from tree

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

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Versions

Version
4.0.4 Feb 2, 2021
4.0.2 Jul 31, 2020
4.0.0 Oct 4, 2019
3.0.0 Oct 4, 2019
2.1.3 Aug 24, 2019
2.1.2 May 23, 2018
2.1.1 Feb 24, 2018