sahtml-query
v2.0.0
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sahtml-query
Fast and low memory query API for HTML (node.js).
Does not build DOM (Document Object Model).
Installation
yarn add sahtml-queryUsage
var parse = require('sahtml-query').parse;
var resultHref = null;
var resultText = '';
parse(
'<!doctype><html lang="en"><body><a id="hello" href="http://example.com">Hello <span>World</span></a></body></html>',
(document) => {
document.onElement('#hello', (link) => {
resultHref = link.element.attrs.href;
link.onElement('span', (span) => {
span.onText(({text}) => resultText += text);
});
});
}
);
console.log(resultHref); // http://example.com
console.log(resultText); // WorldAPI
/**
* Parses the specified HTML fragment and creates context in order to query
* the contents of the HTML fragment.
*/
export function parse(html: string, parseCallback: ParseCallback);
export type ParseCallback = (context: DocumentContext) => void;
/**
* Context which is passed to the callbacks of both `parse`
* and `onElement` methods.
*/
export interface DocumentContext {
/**
* Matches subelement of the specified context.
*/
onElement(cssSelector: string, callback: OnElementCallback);
/**
* Matches every text fragment of the specified context.
*/
onText(callback: OnTextCallback);
/**
* This callback will be executed after leaving the context.
*/
after(callback: () => void);
}
export interface ElementContext extends DocumentContext {
/**
* HTML element information.
*/
element: SAElement;
/**
* Checks if the current element matches the specified selector.
*/
matches(selector: string): boolean;
}
export interface TextContext extends DocumentContext {
/**
* HTML text.
*/
text: string;
/**
* Checks if the current element matches the specified selector.
*/
matches(selector: string): boolean;
}
export type OnElementCallback = (context: ElementContext) => void;
export type OnTextCallback = (context: TextContext) => void;
/**
* HTML element.
*/
export interface SAElement {
/** HTML element tag name, always lower case */
tagName: string;
/** HTML element attributes */
attrs: {[key: string]: string};
/** Is true when HTML element auto closes, i.e. <img /> */
autoEnd: boolean;
}