roshanca

interface Options {
  year?: "numeric" | "2-digit"
  month?: "long" | "short"
  day?: "numeric"
}

export default function formatDate(date: Date | string = ""): string {
  const options: Options = {
    year: "numeric",
    month: "long",

roshanca

# If you come from bash you might have to change your $PATH.
# export PATH=$HOME/bin:/usr/local/bin:$PATH

# Path to your oh-my-zsh installation.
export ZSH="/Users/Mac/.oh-my-zsh"

# Set name of the theme to load --- if set to "random", it will
# load a random theme each time oh-my-zsh is loaded, in which case,
# to know which specific one was loaded, run: echo $RANDOM_THEME
# See https://github.com/ohmyzsh/ohmyzsh/wiki/Themes

roshanca

export function chunk<T>(a: Array<T>, n: number): Array<Array<T>> {
  if (n === 0) {
    return [a];
  }

  const chunks: Array<Array<T>> = [];

  let i = 0;
  while (i < a.length) {
    chunks.push(a.slice(i, (i += n)));

roshanca

/**
 * 首字母大写转换
 * @param {string} word
 */
export const firstUpperCase = ([first, ...rest]) =>
    first.toUpperCase() + rest.join('');

roshanca

function generateInstanceID() {
  const a = "abcdefghijklmnopqrstuv";
  const l = a.length;
  const t = Date.now();
  const r = [0, 0, 0].map(d => a[Math.floor(Math.random() * l)]).join("");
  return `${r}${t}`;
}

roshanca

// reference: https://stackoverflow.com/questions/4481485/changing-css-pseudo-element-styles-via-javascript/12207551#answer-8051488

var addRule = (function (style) {
    var sheet = document.head.appendChild(style).sheet;
    return function (selector, css) {
        var propText = typeof css === "string" ? css : Object.keys(css).map(function (p) {
            return p + ":" + (p === "content" ? "'" + css[p] + "'" : css[p]);
        }).join(";");
        sheet.insertRule(selector + "{" + propText + "}", sheet.cssRules.length);
    };

roshanca

export const copyToClip = (text) => {
  const input = document.createElement('input')
  input.setAttribute('value', text)
  input.setAttribute('readonly', 'readonly')
  document.body.appendChild(input)
  input.select()
  try {
  	document.execCommand('copy') 
  } catch() {
  	console.log('无法复制，请手动复制！')

roshanca

new IntersectionObserver(
  ([change]) => {
    // 被覆盖就是 false，反之 true
    console.log(change.isVisible)
  },
  {
    threshold: [1.0],
    delay: 1000,
    trackVisibility: true
  }

roshanca

const measureTime = (cb, ...args) => {
	const t0 = performance.now()
    cb(...args)
  	const t1 = performance.now()
    console.log(`Call to do something took ${t1 - t0} milliseconds.`)
}

measureTime(myFunction, params)

roshanca

class A {
  p1() {
    console.log('this is p1')
  }
}

class B {
  p2() {
    console.log('this is p2')
  }