tvler

const getCircularArrayIndex = (i, { length }) => 
  (i % length + length) % length;

const testArray = new Array(5);

for (let i = -30; i < 31; i++) {
 console.log(i, getCircularArrayIndex(i, testArray))   
}

tvler

open -a Preview ~/Library/Messages/Attachments

tvler

new URLSearchParams([...new FormData(ev.target)])

tvler

const getProxy = (target = {}, key) =>
  target[key] || (target[key] = new Proxy({}, { get: getProxy }));

const fillPick = (proxy, fn, fromObject = fn(proxy)) =>
  Object.assign(
    {},
    ...Object.entries(proxy).map(([key, value]) => ({
      [key]: Object.keys(value).length
        ? fillPick(value, fn, fromObject[key])
        : fromObject[key],

tvler

// Thanks to https://vincent.billey.me/pure-javascript-immutable-array

import React, { Component } from 'react';

const setStateArraySplice = (
  stateKey, 
  arrayStart, 
  arrayDeleteCount,
  ...items
) => ({

tvler

var test = () => {
  console.log('fired on DOMContentLoaded or after');
}

window.onwheneva = test;

document.readyState !== 'loading' ? onwheneva() :
 document.addEventListener('DOMContentLoaded', onwheneva);