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aduth / Hpq

Utility to parse and query HTML into an object shape

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hpq

A utility to parse and query HTML into an object shape. Heavily inspired by gdom.

Try the Explorer Demo

Build Status

Example

hpq.parse( '<figure><img src="img.png" alt="Image"><figcaption>An Image</figcaption></figure>', {
	src: hpq.attr( 'img', 'src' ),
	alt: hpq.attr( 'img', 'alt' ),
	caption: hpq.text( 'figcaption' )
} );

// { src: "img.png", alt: "Image", caption: "An Image" }

hpq.parse( '<blockquote><p>...</p><p>...</p><cite>Andrew</cite></blockquote>', {
	text: hpq.query( 'p', hpq.text() ),
	cite: hpq.text( 'cite' )
} );

// { text: [ "...", "..." ], cite: "Andrew" }

Getting Started

Download the generated script file or install via NPM if you have a front-end build process:

npm install hpq

hpq assumes that it's being run in a browser environment. If you need to simulate this in Node, consider jsdom.

Usage

Pass a markup string or DOM element to the top-level parse function, along with the object shape you'd like to match. Keys of the matcher object will align with the returned object shape, where values are matcher functions; one of the many included matchers or your own accepting the node under test.

API

parse( source: string | Element, matchers: Object | Function ): Object | mixed

Given a markup string or DOM element, creates an object aligning with the shape of the matchers object, or the value returned by the matcher function. If matchers is an object, its keys are the desired parameter names and its values are matcher functions that will each extract the value of their desired parameter.

Matcher functions accept a single parameter node (a DOM element) and return the requested value.

attr( selector: ?string, name: string ): Function

Generates a function which matches node of type selector, returning an attribute by name if the attribute exists. If no selector is passed, returns attribute of the query element.

prop( selector: ?string, name: string ): Function

Generates a function which matches node of type selector, returning an attribute by property if the attribute exists. If no selector is passed, returns property of the query element.

html( selector: ?string ): Function

Convenience for prop( selector, 'innerHTML' ) .

text( selector: ?string ): Function

Convenience for prop( selector, 'textContent' ) .

query( selector: string, matchers: Object | Function )

Creates a new matching context by first finding elements matching selector using querySelectorAll before then running another parse on matchers scoped to the matched elements.

License

Copyright (c) 2018 Andrew Duthie

The MIT License (MIT)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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