Oaphi

//@see https://github.com/microsoft/TypeScript/issues/23182#issuecomment-379091887
type swithcNever<T, A, B> = [T] extends [never] ? A : B;

//@see https://stackoverflow.com/a/63568058/11407695
type Flatten<T extends any[]> = T extends [infer U, ...infer R]
  ? U extends any[]
    ? [...Flatten<U>, ...Flatten<R>]
    : [U, ...Flatten<R>]
  : [];

Oaphi

type Indices<A> = Exclude<keyof A, keyof any[]>;

type valueAtIndexToNever<T extends any[], I extends number> = {
    [ P in keyof T ] : P extends Indices<T> ? 
        P extends `\${I}` ? never : T[P] : 
    T[P]
}

type test1 = valueAtIndexToNever<[1,2,3],1>; //[1, never, 3];

Oaphi

export const remClasses = (
  { classList }: { classList: DOMTokenList },
  ...classes: string[]
) => classList.remove(...classes);

export const addClasses = (
  { classList }: { classList: DOMTokenList },
  ...classes: string[]
) => classList.add(...classes);

Oaphi

  /**
   * @summary extracts values from select
   * @param {HTMLSelectElement} sel
   * @return {string[]}
   */
  const getSelectVals = ({ options }) =>
    Array.from(options).map(({ value }) => value);
  
  /**
   * @summary checks if select has a value

Oaphi

import { BaseEncodingOptions } from "fs";
import { appendFile, mkdir } from "fs/promises";
import { parse, sep } from "path";

const recursiveAppend = async (
  path: string,
  encoding: BaseEncodingOptions["encoding"] = "utf-8"
) => {
  const parts = path.split(sep);

Oaphi

Quick install for HTML-based projects:

npm install --save-dev 
  webpack \
  clean-webpack-plugin \
  css-minimizer-webpack-plugin \
  html-webpack-plugin \
  html-loader

Oaphi

    /**
     * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/TextMetrics}
     * @summary measure text width
     * @param {CanvasRenderingContext2D} ctx drawing context
     * @returns {number}
     */
    const measureWidth = (ctx, text) => {

        const measurement = ctx.measureText(text);
        

Oaphi

const getFolderByName = (name: string, create = false) => {
  const iter = DriveApp.getFoldersByName(name);
  return iter.hasNext()
    ? iter.next()
    : create
    ? DriveApp.createFolder(name)
    : null;
};

Oaphi

/**
 * @summary converts unicode literal \u{<code point>} into hex byte sequence \x<byte>...
 */
const fromUnicodeToHexBytes = (unicode: string) => {
  //make bytes unsigned -128 +127 -> +256 or & 0xff -> 0 256
  return Utilities.newBlob(unicode)
    .getBytes()
    .map((bt) => `\\x${(bt & 0xff).toString(16)}`)
    .join("");
};

Oaphi

const withInterval = async ({
    timeouts = [],
    delay = 0,
    interval = 4,
    callback,
    times = 1,
    stopIf = () => false
}) => {
    if (!times) {
        return;