getify

// 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.",

jacques-blom

import {createContext, useState} from 'react'
import {Element, Rectangle} from './components/Rectangle/Rectangle'
import {PageContainer} from './PageContainer'
import {Toolbar} from './Toolbar'

type ElementsContextType = {
    elements: Element[]
    addElement: () => void
    setElement: SetElement
}