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July 28, 2021 10:50
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const Stack = (function module() { | |
const items = []; | |
function execute() { | |
for (let i = items.length - 1; i >= 0; i--) { | |
items[i](); | |
items.pop(); | |
} | |
} | |
return { | |
push: (item) => { items.push(item) }, | |
get: () => items, | |
execute, | |
} | |
}()) | |
const appendChild = (parent, child) => { | |
if (Array.isArray(child)) { | |
child.forEach((nestedChild) => appendChild(parent, nestedChild)); | |
} else { | |
parent.appendChild(child.nodeType ? child : document.createTextNode(child)) | |
} | |
} | |
export const createElement = (tag, props, ...children) => { | |
if (typeof tag === 'function') { | |
return tag(props, children); | |
} | |
let element; | |
if (tag === 'svg' || tag === 'path') { | |
element = document.createElementNS('http://www.w3.org/2000/svg', tag) | |
} else { | |
element = document.createElement(tag); | |
} | |
Object.entries(props || {}).forEach(([name, value]) => { | |
if (name.startsWith('on') && name.toLowerCase() in window) { | |
element.addEventListener(name.toLowerCase().substr(2), value); | |
} else { | |
element.setAttribute(name, value.toString()); | |
} | |
}); | |
children.forEach((child) => { | |
appendChild(element, child); | |
}) | |
return element; | |
} | |
export const createFragment = (props, ...children) => children | |
export const useLayoutEffect = (callbacks) => { | |
Stack.push(callbacks); | |
} | |
export const executeLayoutEffect = () => { | |
Stack.execute(); | |
} |
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import { executeLayoutEffect } from './jsx'; | |
const renderer = (data, selector) => { | |
selector.innerHTML = '' | |
if (!data) { return; } | |
if (data instanceof Array) { | |
data[0].forEach((element) => { | |
selector.appendChild(element) | |
}) | |
} else { | |
selector.appendChild(data); | |
} | |
executeLayoutEffect(); | |
} | |
export const render = (data) => renderer(data, document.getElementById('app')); | |
export const initialize = (data) => renderer(data, document.body); |
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/* eslint-disable no-restricted-globals */ | |
class Router { | |
constructor() { | |
this.#init(); | |
} | |
#paths = {}; | |
#previousPath = null; | |
#previousHash = null; | |
#redirect(url) { | |
if (url === '/404') { | |
window.history.replaceState(null, null, url); | |
} else { | |
window.history.pushState(null, null, url) | |
} | |
this.#checkPatterns(url); | |
} | |
#handleError() { | |
// eslint-disable-next-line no-console | |
console.error('Page not found'); | |
this.#redirect('/404'); | |
} | |
#transformRegexOutput(input) { | |
try { | |
return Object | |
.keys(input) | |
.filter((key) => Number(key)) | |
.reduce((obj, key) => { return { ...obj, [key]: input[key] } }, {}); | |
} catch (error) { | |
this.#handleError(); | |
return {}; | |
} | |
} | |
#mergeObjects(obj1, obj2) { | |
let iterator = -1; | |
return Object | |
.entries(obj1) | |
.reduce((obj, key, index) => { | |
if (obj1[index + 1] === '*') { iterator += 1; } | |
return ({ ...obj, [obj1[index + 1] === '*' ? iterator : obj1[index + 1].substring(1)]: obj2[index + 1] }) | |
}, {}) | |
} | |
#parsePattern(pattern) { | |
return `^${pattern | |
.replace(/\\/g, '\\/') | |
.replace(/(\*|:\w*)/gm, '(:?[A-z0-9|*]*)')}(?:\\/?)$`; | |
} | |
get(pattern, callback) { | |
const paths = this.#paths; | |
if (!paths[pattern]) { | |
paths[pattern] = {}; | |
paths[pattern].callbacks = []; | |
} | |
paths[pattern].reg = this.#parsePattern(pattern); | |
paths[pattern].callbacks.push(callback); | |
return true; | |
} | |
#checkIfAnyPatternIsMatching(url) { | |
return (element) => { | |
const pattern = this.#paths[element].reg; | |
const newRegex = new RegExp(pattern, 'i').exec(url); | |
if (!newRegex) { return false } | |
return true; | |
} | |
} | |
#startsWithHash(string) { | |
const regEx = /^#/; | |
const startsWithHash = regEx.test(string); | |
return Boolean(startsWithHash); | |
} | |
#getParams(pattern, url) { | |
const parsedPattern = this.#paths[pattern].reg; | |
const regex = new RegExp(parsedPattern, 'i'); | |
const tokens = this.#transformRegexOutput(regex.exec(pattern)); | |
const params = this.#transformRegexOutput(regex.exec(url)); | |
return this.#mergeObjects(tokens, params); | |
} | |
#processURL(pattern, url) { | |
this.#previousPath = url; | |
const result = this.#getParams(pattern, url); | |
return this.#paths[pattern].callbacks.forEach((callback) => callback(result)); | |
} | |
// eslint-disable-next-line complexity | |
#checkPatterns(url) { | |
const hashTag = /#\S+\b/gm; | |
const urlHashExtract = hashTag.exec(url); | |
const targetUrl = urlHashExtract ? url.replace(urlHashExtract[0], '') : url; | |
const result = Object.keys(this.#paths).find(this.#checkIfAnyPatternIsMatching(targetUrl)); | |
if (!result) { | |
this.#handleError(); | |
return false; | |
} | |
if (this.#previousPath === targetUrl) { | |
return false; | |
} | |
this.#processURL(result, targetUrl); | |
return true; | |
} | |
#init() { | |
this.get('/', () => { | |
}); | |
this.get('/404', () => { | |
}); | |
// eslint-disable-next-line complexity | |
document.addEventListener('click', (event) => { | |
const target = event.target.closest('a'); | |
if (!target) { | |
return; | |
} | |
const url = target.getAttribute('href'); | |
if (this.#startsWithHash(url)) { | |
return; | |
} | |
if (target.hostname === location.hostname) { | |
event.preventDefault(); | |
this.#redirect(url); | |
} | |
}, false); | |
window.addEventListener('DOMContentLoaded', (event) => { | |
event.preventDefault(); | |
this.#checkPatterns(location.pathname + location.hash); | |
}); | |
window.addEventListener('popstate', () => { | |
this.#checkPatterns(location.pathname + location.hash); | |
}); | |
} | |
} | |
export default Router; |
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