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class MySelectElement extends HTMLElement { | |
constructor() { | |
super(); | |
const observer = new MutationObserver((records) => { | |
for (let record of records) { | |
this.addItem(record.addedNodes); | |
this.removeItem(record.removedNodes); | |
} | |
}); |
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import { shadow, ShadowTemplate, html, css } from './shadow.js'; | |
const template: ShadowTemplate = { | |
css: css` | |
:host { | |
display: contents; | |
} | |
`. | |
html: html` | |
<slot></slot> |
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function* windowed<T>(arr: T[], size: number) { | |
for (let i = 0; i < arr.length; i++) { | |
yield arr.slice(i, size + i); | |
} | |
} | |
let thing = windowed([0, 1, 2, 3], 2); | |
for (let [a, b] of thing) { | |
console.log(a, b); |
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// Freezes document scrolling without remove scrollbar. | |
// This gets rid of the annoying jump that happens when you set the body overflow to hidden | |
// Maintains scroll position on the page | |
export function freezeScroll() { | |
document.body.style.top = -document.documentElement.scrollTop + 'px'; | |
document.body.style.position = 'fixed'; | |
document.body.style.left = '0'; | |
document.body.style.right = '0'; | |
document.body.style.overflowY = 'scroll'; | |
} |
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export function getFocusableEls(element: HTMLElement) { | |
return element.querySelectorAll<HTMLElement>( | |
'a[href]:not([disabled]), button:not([disabled]), textarea:not([disabled]), input[type="text"]:not([disabled]), input[type="radio"]:not([disabled]), input[type="checkbox"]:not([disabled]), select:not([disabled])' | |
); | |
} | |
export class FocusTrap { | |
private focusableEls!: NodeListOf<HTMLElement>; | |
private firstFocusableEl?: HTMLElement; | |
private lastFocusableEl?: HTMLElement; |
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(function () { | |
expose('createMyComponent', register, factory); | |
/** | |
* Exposes your new component to the window or to a module | |
* | |
* @param {string} name - the factory name to expose | |
* @param {function} definition - the definition of your web component. registers to the document | |
* @param {function} factory - method for programmatically creating web component | |
*/ |
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import { component, State, handle, JoistElement, get, HandlerCtx } from '@joist/component'; | |
import { template, html } from '@joist/component/lit-html'; | |
@component({ | |
tagName: 'my-counter', | |
state: 0, | |
render: template(({ state, run }) => { | |
return html` | |
<button @click=${run('dec_btn_clicked', -1)}>-</button> | |
<span>${state}</span> |
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import { component, State, JoistElement, property, get, PropChange } from '@joist/component'; | |
@component({ | |
tagName: 'app-root', | |
state: '' | |
}) | |
class AppElement extends JoistElement { | |
@get(State) | |
private state!: State<string>; |
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import { component, State, handle, JoistElement, get } from '@joist/component'; | |
import { template, html } from '@joist/component/lit-html'; | |
@component<number>({ | |
tagName: 'app-root', | |
state: 0, | |
render: template(({ state, run }) => { | |
return html` | |
<button @click=${run('dec')}>-</button> | |
<span>${state}</span> |
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import { component, State, handle, JoistElement, get } from '@joist/component'; | |
import { template, html } from '@joist/component/lit-html'; | |
@component({ | |
tagName: 'my-counter', | |
state: 0, | |
render: template(({ state, run }) => { | |
return html` | |
<button @click=${run('dec_btn_clicked', -1)}>-</button> | |
<span>${state}</span> |
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