Last active
October 9, 2022 14:09
-
-
Save 50kudos/be77d465fc3df875400b587d1cc24f05 to your computer and use it in GitHub Desktop.
Custom elements compose nested props (https://jsfiddle.net/2L5ypn9a/2/)
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| button { margin: .5rem; } | |
| input { display: inline-block; margin: 0 .5rem; } | |
| stack-btns+span {display: block} |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <body>Dots: <stack-show></stack-show> </body> |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| const define = (name, ctx, events, opts = {}) => { | |
| const l = { handleEvent: e => { | |
| ctx.e = e; const act = events[e.type]; if (!act) return | |
| typeof act == "function" ? act(ctx) : act.find(c => e.target.matches(c[0]))?.[1](ctx) | |
| } } | |
| const off = self => self.off.forEach(d => d()) | |
| const on = (self, events) => { | |
| self.off = Object.entries(events).map(([k, _]) => { | |
| self.addEventListener(k, l) | |
| return () => self.removeEventListener(k, l) | |
| })} | |
| if (customElements.get(name)) | |
| for (let el of document.querySelectorAll(name)) { off(el); on(el, events) } | |
| else | |
| customElements.define(name, class extends HTMLElement { | |
| connectedCallback() { on(this, events) } | |
| disconnectedCallback() { off(this) } | |
| }) | |
| } | |
| const mount = (s,html) => document.querySelector(s).innerHTML = html | |
| const show = (stack,ch) => mount("stack-show", `<stack-btns></stack-btns><span>${stack.map(a => `<span>${ch || a.text}</span>`).join("")}</span>`) | |
| const btns = (stack,ch) => mount("stack-btns", `<button data-cmd="add">+</button>${stack.length}<button data-cmd="rm">-</button>*<input value="${ch}">`) | |
| define("stack-show", {ch: ".", stack: [], views: {show, btns}}, {"click": [ | |
| ["[data-cmd=add]", ctx => { ctx.stack.push({text: "."}); ctx.render(ctx.stack, ctx.ch) }], | |
| ["[data-cmd=rm]", ctx => { ctx.stack.pop(); ctx.render(ctx.stack, ctx.ch) }] | |
| ], | |
| "init": ctx => { let {stack, views} = ctx; | |
| ctx.render = (stack,ch=".") => {views.show(stack,ch); views.btns(stack, ch)} | |
| define("stack-btns", ctx, {"input": ({stack,e}) => Object.assign(ctx, {ch:e.target.value}) && ctx.render(stack, ctx.ch)}) | |
| ctx.render(stack) | |
| }}) | |
| document.querySelector("stack-show").dispatchEvent(new CustomEvent("init")) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment