随笔分类 - Javascript
摘要：function timeout(time) { return new Promise((resolve) => { setTimeout(resolve, time); }); } class ParalleTask { constructor(paralleCount = 2) { this.t
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摘要：export const randomColor = () => { return "#" + Math.random().toString(16).substring(2, 8).padEnd(6, '0') } export const randomString = (len: number)
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摘要：In this post, we’ll explore an intriguing use of JavaScript’s Proxy and Symbol.toPrimitive to perform cumulative operations, mimicking a numeric conte
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摘要：// Object.prototype[Symbol.iterator] = function() { // return Object.values(this)[Symbol.iterator](); // } Object.prototype[Symbol.iterator] = functio
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摘要：One way data binding, the parent component pasing data through v-modelto child component, if child modify the data, v-modelwill take care emit the cha
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摘要：/** * Big integer sum * Using strings to represent big integers * @param {string} a * @param {string} b * @returns {string} */ function bigIntSum(a, b
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摘要：When you use ChatGPT, the response comes in stream, so that it can appears on screen whenever data come back from server, we don't need to wait all da
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摘要：Try option 1: Promise Promise running in Microtask queue, and rendering should wait until the queue is empty; If you have a large number of time-consu
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摘要：const fetch = () => new Promise((res) => { setTimeout(() => res({ user: 'zhen' }), 1150) }) globalThis.fetch = fetch async function getUser() { return
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摘要：For this code, try to not modify the code itself but mutate obj var o = (function () { var obj = { a: 1, b: 2, }; return { get: function (k) { return
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摘要：The basic interpolatefunction we can create: function interpolate(str, params) { let names = Object.keys(params); // ["title", "description"] let valu
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摘要：Let's say we have a web component: import { getProductById } from "../services/Menu.js"; import { addToCart } from "../services/Order.js"; export defa
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摘要：// memento.js import { TodoList } from "./classes.js"; export const TodoHistory = { history: [], push(state) { if (state) { // always push a new Set t
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摘要：Refer to: https://stately.ai/docs/actor-model What defines an “actor”? Actors are independent “live” objects that can communicate with each other via
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摘要：Problem to Solve Reparesent a value that is immutable and distinct from other objects based on its properties rather than its identity. Solution Creat
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摘要：Problem to Solve Share functionality between classes without using inheritance. Solution Create a class containing methods that can be used by other c
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摘要：class ApplicationError extends Error { get name() { return this.constructor.name; } } class DatabaseError extends ApplicationError {} class UserFacing
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摘要：class Product { name; price; constructor(name, price) { this.name = name; try { this.price = price * 1.30; } catch(e) { throw new Error("Product canno
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摘要：Docs: https://webkit.org/blog/6240/ecmascript-6-proper-tail-calls-in-webkit/ /* This is a recursive function without PTC */ function fatorial(n) { if
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摘要：You don't really need to apply a really complex regex for one validation, instead you can combine multi regex together to fulfilll the task. const reg
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