Nicholas Kircher MiracleBlue

Experimental Safe JavaScript Navigation

Implemented using ES6 Proxies and Symbols

The purpose of this function is to provide a way to avoid deep nested conditionals when traversing a hierarchy of objects. Some languages use an operator such as '?.' to perform this capability. This is sometimes called safe navigation or null conditional operators.

You can somewhat think of this as how a xpath select works. If any nodes along the path are not found, your result is simply not found without throwing an exception and without needing to check each individual node to see if it exists.

Suggestions for improvements welcome!

	/* jshint expr:true */
	import { expect } from 'chai';
	import {
	describe,
	it
	} from 'mocha';
	import {
	convertTimeTo12
	} from 'digital-court-results/helpers/time-format';

	// So this is fking incredible. Its actually possible to
	// do totally immutable state inside a generator.
	// No mutations. No 'let's. No shame!
	function* range(start, end, step = 1, current = start) {
	yield current;
	if (current < end) yield* range(start, end, step, current + step);
	}

	// In the name of the Turing, and of the Crockford, and of the holy Atwood, Amen.
	console.log(...range(5, 15));

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<title></title>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	</head>
	<body>
	<h2>Hello from outside the Shadow DOM!</h2>