getify
/ 1-CalendarItem.js
Last active
March 21, 2024 09:11
an illustration (non-trivial example) of many newer JS class features
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| // abstract class, not intended to be instantiated directly | |
| class CalendarItem { | |
| static #UNSET = Symbol("unset") | |
| static #isUnset(v) { | |
| return v === this.#UNSET; | |
| } | |
| static { | |
| for (let [idx,msg] of [ | |
| "ID is already set.", | |
| "ID is unset.", |
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| // roughish AMP attribute types for JSX/TypeScript | |
| // Source: https://playground.amp.dev/amphtml-hint.json | |
| // https://github.com/Microsoft/TypeScript/issues/15449 | |
| // https://stackoverflow.com/questions/50585952/typescript-and-google-amp-property-amp-img-does-not-exist-on-type-jsx-intrin | |
| import * as React from 'react'; | |
| // why null ? | |
| type _ANY = any; | |
| type _ANYS = any; | |
| declare module 'react' { | |
| interface HTMLAttributes<T> { |