tho-graf

function* range(fromInclusive, toExclusive, step = 1) {
  if (toExclusive == undefined) {
    toExclusive = fromInclusive;
    fromInclusive = 0;
  }

  for (let i = fromInclusive; (toExclusive - i) * step > 0; i += step) {
    yield i;
  }
}

tho-graf

const shouldAddB = true;
let obj = {a:1, ...(shouldAddB && {b:2})};

tho-graf

import * as React from "react";

type Value = boolean;

type ContextWithSetter = React.Context<{
  value: Value;
  setValue: (value: Value) => void;
}>;

const { Provider, Consumer }: ContextWithSetter = React.createContext({

tho-graf

getPackageNames(input) {
		// you don't need the global array and mutate it later. The map method will create a new array for you ;)
		if (!input) {
			return Promise.resolve({ options: [] });
		}

		return fetch(`https://api.npms.io/v2/search?q=${input}`)
			.then(response => response.json())
			// the map method will 
			// 1. create a new array

tho-graf

function setup(propOverrides = {}) {
  const defaultProps = {
    onChange: jest.fn(),
    renderBlockContent: jest.fn(),
    value: [{ content: 'Test 1' }, { content: 'Test 2' }]
  };

  const mergedProps = {
    ...defaultProps,
    ...propOverrides