hast-util-has-property

hast utility to check if an element has a certain property.

What is this?
When should I use this?
Install
Use
API
- hasProperty(node, field)
Types
Compatibility
Security
Related
Contribute
License

What is this?

This package is a small utility that checks if a node is an element that has a given property.

When should I use this?

This utility is super niche, if you’re here you probably know what you’re looking for!

Install

This package is ESM only. In Node.js (version 16+), install with npm:

npm install hast-util-has-property

In Deno with esm.sh:

import {hasProperty} from 'https://esm.sh/hast-util-has-property@3'

In browsers with esm.sh:

<script type="module">
  import {hasProperty} from 'https://esm.sh/hast-util-has-property@3?bundle'
</script>

Use

import {hasProperty} from 'hast-util-has-property'

hasProperty({type: 'text', value: 'alpha'}, 'bravo') // => false

hasProperty(
  {
    type: 'element',
    tagName: 'div',
    properties: {id: 'bravo'},
    children: []
  },
  'className'
) // => false

hasProperty(
  {
    type: 'element',
    tagName: 'div',
    properties: {id: 'charlie'},
    children: []
  },
  'id'
) // => true

API

This package exports the identifier hasProperty. There is no default export.

`hasProperty(node, field)`

Check if nodeis an element and has a name property.

Parameters

node (Node) — node to check (typically Element)
name (string) - property name to check

Returns

Whether node is an element that has a name property (boolean).

Types

This package is fully typed with TypeScript. It exports no additional types.

Compatibility

Projects maintained by the unified collective are compatible with maintained versions of Node.js.

When we cut a new major release, we drop support for unmaintained versions of Node. This means we try to keep the current release line, hast-util-has-property@^3, compatible with Node.js 16.

Security

hast-util-has-property does not change the syntax tree so there are no openings for cross-site scripting (XSS) attacks.

hast-util-is-element — check if a node is a (certain) element
hast-util-is-body-ok-link — check if a node is “Body OK” link element
hast-util-is-conditional-comment — check if a node is a conditional comment
hast-util-is-css-link — check if a node is a CSS link element
hast-util-is-css-style — check if a node is a CSS style element
hast-util-embedded — check if a node is an embedded element
hast-util-heading — check if a node is a heading element
hast-util-interactive — check if a node is interactive
hast-util-is-javascript — check if a node is a JavaScript script element
hast-util-labelable — check whether a node is labelable
hast-util-phrasing — check if a node is phrasing content
hast-util-script-supporting — check if a node is a script-supporting element
hast-util-sectioning — check if a node is a sectioning element
hast-util-transparent — check if a node is a transparent element
hast-util-whitespace — check if a node is inter-element whitespace

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.

hast-util-has-property

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