JimmyLv

class EmailInput extends Component {
  state = {
    email: this.props.defaultEmail,
    prevPropsUserID: this.props.userID
  };

  static getDerivedStateFromProps(props, state) {
    // Any time the current user changes,
    // Reset any parts of state that are tied to that user.
    // In this simple example, that's just the email.

JimmyLv

const user = {
  id: 1,
  name: 'Hugo',
  friends: [3, 5, 22]
};
test('user 3 should be a friend of user', () => {
  expect(user).toEqual(
    expect.objectContaining({
      friends: expect.arrayContaining([3])
    })

JimmyLv

test('id and productName should match', () => {
  const obj = {
    id: '111',
    productName: 'Jest Handbook',
    url: 'https://jesthandbook.com'
  };
  expect(obj).toEqual(
    expect.objectContaining({
      id: '111',
      productName: 'Jest Handbook'

JimmyLv

describe('contains test', () => {
  it('should return true', () => {
    const arr = [ { a: 1 }, { b: 2 }, { c: 3 } ]
    expect(arr).toContainEqual( // Compare values only.
      { b: 2 }
    )
  })
})

JimmyLv

// ==UserScript==
// @name         Twitter Auto Translator
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://twitter.com/*
// @grant        none
// ==/UserScript==

JimmyLv

Shoplooks is an exclusive
integrated marketing agency
for bloggers, influencers
And content creators sharing what they love and helping the world's
best brands reach new audiences and enhance awareness.

JimmyLv

Foci https://click.shoplooks.com/4mmh/61 
苹果手表6代（银40+铝合金+白单圈表带3号）https://click.shoplooks.com/45C4/61

JimmyLv

const [value, setValue] = useState(0)

JimmyLv

function App() {

  const [todos, setTodos] = useState([
    { id: 1, title: "Selectus aut autem", completed: false },
    { id: 2, title: "Luis ut nam facilis et officia qui", completed: false },
    { id: 3, title: "Fugiat veniam minus", completed: false },
    { id: 4, title: "Aet porro tempora", completed: true },
    { id: 5, title: "Laboriosam mollitia et enim quasi", completed: false }
  ]);

JimmyLv

import { React, ReactDOM } from "https://unpkg.com/es-react@16"
import htm from "https://unpkg.com/htm?module"

const html = htm.bind(React.createElement)