fontoxpath/tmp/test.js

A minimalistic XPath 3.1 engine in JavaScript

const  fontoxpath = require('../dist/fontoxpath');
const  slimdom = require('slimdom');

function generateDom (document, depth, width, elementName) {
	const rootNode = document.createElement(elementName);
	document.appendChild(rootNode);
	function generateChildren (parentNode, depth) {
		if (depth < 0) {
			return;
		}
		const prototypeChild = parentNode.cloneNode(false);
		parentNode.appendChild(prototypeChild);
		generateChildren(prototypeChild, depth - 1, elementName);
		for (let i = 1; i < width; ++i) {
			parentNode.appendChild(prototypeChild.cloneNode(true));
		}
	}

	generateChildren(rootNode, depth);

	return rootNode;
}

var rootNode = generateDom(slimdom.createDocument(), 5, 5, 'someElement');

// function printStatus(fn) {
//     switch(%GetOptimizationStatus(fn)) {
//         case 1: console.log("Function is optimized"); break;
//         case 2: console.log("Function is not optimized"); break;
//         case 3: console.log("Function is always optimized"); break;
//         case 4: console.log("Function is never optimized"); break;
//         case 6: console.log("Function is maybe deoptimized"); break;
//         case 7: console.log("Function is optimized by TurboFan"); break;
//         default: console.log("Unknown optimization status"); break;
//     }
// }

//Fill type-info
fontoxpath.evaluateXPathToNumber('//someElement/* => count()', rootNode);
// 2 calls are needed to go from uninitialized -> pre-monomorphic -> monomorphic
fontoxpath.evaluateXPathToNumber('//someElement/* => count()', rootNode);