Chen Hai Yun

Today, let’s look at how to do that. The challenge #Let’s say you had two lunch orders as JavaScript objects. var order1 = { sandwich: 'tuna', chips: true, drink: 'soda', order: 1, toppings: ['pickles', 'mayo', 'lettuce'], details: { name: 'Chris', phone: '555-555-5555', email: 'no@thankyou.com' }, otherVal1: '1' }; var order2 = { sandwich:

Place this in the constructor: if (window.performance) { if (performance.navigation.type == 1) { alert( "This page is reloaded" ); } else { alert( "This page is not reloaded"); } } It will work, please see this example on stackblitz. references: https://stackoverflow.com/questions/50026028/react-how-to-detect-page-refresh-f5

Whilst looking a simple way to auto increment an application build version number for a small React JavaScript application I found a neat solution so I’m sharing it here for others to use (and for me to refer back to on my next project). Photo by Ariel on UnsplashProblem:

I'm creating a component and I need to get it's parent <div> width and height. I'm using Hooks, so all my components are functions. I've read some examples using classes, but this won't apply to my component. So I have this component: export default function PlantationMap(props) { <

Learn how to build a React switch component using the native HTML checkbox input! You’ll learn plenty about React checkboxes in the process. If there’s one UI component that iOS introduced to the world, it’s the switch or toggle as some people refer to it as. What

https://magic-bucket.s3.cn-north-1.amazonaws.com.cn/edge-electron-linux-x64.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAYCLAVGJ3GHSWWGUF%2F20220309%2Fcn-north-1%2Fs3%2Faws4_request&X-Amz-Date=20220309T015741Z&X-Amz-Expires=300&X-Amz-SignedHeaders=host&X-Amz-Signature=086ced514a078f23e8b94746b2d0be35be747bafbeb67461fa85db85385984cc [Desktop Entry] Name=SAB EDGE Exec=/path/to/binary Terminal=false Type=Application StartupNotify=true Encoding=UTF-8

There should be a file called "react-app-env.d.ts" that is created when you use create-react-app. This file classes all types of image files and many more as modules that can be imported. inside the file there should be the following: /// <reference types="react-scripts" />

If you aren't using fetchBusinesses method anywhere apart from the effect, you could simply move it into the effect and avoid the warning useEffect(() => { const fetchBusinesses = () => { return fetch("theURL", {method: "GET"} ) .then(res => normalizeResponseErrors(res)) .then(res => { return res.json(); }) .then(rcvdBusinesses => { // some stuff }) .catch(

When it comes to linting TypeScript code, there are two major linting options to choose from: TSLint and ESLint. TSLint is a linter that can only be used for TypeScript, while ESLint supports both JavaScript and TypeScript. In the TypeScript 2019 Roadmap, the TypeScript core team explains that ESLint has

eact引入报错：Import in body of module; reorder to top import/first一、问题情形 想引入模块：import { CSSTransition } from 'react-transition-group'; import React, { Component } from 'react'; const logo = require("./images/logo.png"); const icon_beta = require("./images/icon_beta.png"); import { CSSTransition } from 'react-transition-group'; 结果报错，错误提示如下： 二、解决方法 将import语句写在const语句上面即可： import React, { Component } from 'react';

[July 2021] If you see this message when running eval "$(pyenv init -)" WARNING: `pyenv init -` no longer sets PATH. Run `pyenv init` to see the necessary changes to make to your configuration. you should check the message from pyenv init as the warning says, but in a nutshell,

MacOS comes with Python pre-installed. But it's Python Version 2.7, which is now deprecated (abandoned by the Python developer community). The entire Python community has now moved on to using Python 3.x (the current version as of writing this is 3.9). And Python 4.x will be

When a React component handles bursting events like window resize, scrolling, user typing into an input, etc. — it's wise to soften the handlers of these events. Otherwise, when the handlers are invoked too often you risk making the application lagging or even unresponsive for a few seconds. Fortunately, debouncing and

One of the most fundamental parts of frontend development is styling, in this post, we will see how to use styles with webpack. This post is a continuation of my earlier post where I have explained How to set up react project with webpack and babel. So if you have

The following is a guest post by David Corbacho, a front end engineer in London. We’ve broached this topic before, but this time, David is going to drive the concepts home through interactive demos that make things very clear. Debounce and throttle are two similar (but different!) techniques to

In my previous post on Create react App from scratch using JS , I got positive responses and many comments on making a post on typescript, hence i decided to do the same task using Typescript with Fast Refresh. Hope you would like this as well! :) The simplest way to create

Fun fact: Did you know that HTML checkboxes have three built-in states, not just two? In addition to the checked state, there is also an indeterminate state. You can’t set a checkbox to indeterminate with HTML, only with JavaScript. Here’s what they look like in the browser: Why

On Git, tags are often used in order to tag specific commits that may be more important than others. Tags may be used in order to bookmark certain events : releases, bug-fixes or just to add an informative and descriptive note to a commit. On GitHub, tags are often associated with

PHP MySQL CRUD Application - Tutorial RepublicIn this tutorial you will learn how to build a CRUD application to create, read, update and delete records in a MySQL database table with PHP.TutorialRepublicIn this tutorial you'll learn how to build a CRUD application with PHP and MySQL. What is CRUDCRUD

In this tutorial, we will take the following steps and create a very robust, clean, and fast local multi-version PHP (7.4, 8.0, 8.1) development environment on macOS Big Sur with Intel or Apple M1 chipsets: Install Xcode, VS Code & Homebrew *: This step is required to get

Install with brew Use brew to install the nginx with command:brew install nginx After install run:sudo nginx Testing Open Navigator it by going to URL:http://localhost:8080 Configuration The default place of nginx.conf on Mac after installing with brew is:/usr/local/etc/nginx/nginx.conf

以2022年的国家法定假期为例 ➜ ~ curl http://icalendar.simonchen.xyz:8088/ical BEGIN:VCALENDAR VERSION:2.0 X-WR-CALNAME:中国法定节假日 X-APPLE-CALENDAR-COLOR:#8DEEEE PRODID:xhh52ch@gmail.com BEGIN:VEVENT DTSTAMP:20211218T160000Z DTSTART;VALUE=DATE:20210101 DTEND;VALUE=DATE:20210104 SUMMARY:元旦假期 TZID:Asia/Shanghai UID:93eff3fb-00cb-4855-b0ec-25996122cb07 DESCRIPTION:元旦:2021年1月1日至3日放假，共3天; END:VEVENT BEGIN:VEVENT DTSTAMP:20211218T160000Z

At the time of this writing, React Router v6 is still in alpha, but the time is about right to start playing with it and exploring what’s to come. This guide will give you a peek at the new features/changes! As you may know, the lead maintainers forked

Query builder is used build complex SQL queries in an easy way. It is initialized from Connection method and QueryRunner objects. We can create QueryBuilder in three ways. ConnectionConsider a simple example of how to use QueryBuilder using connection method. import {getConnection} from "typeorm"; const user = await getConnection() .createQueryBuilder() .select(