An interview experience that made me so sad. — This is an interview experience that happened to my friend not long ago. The interviewer wanted him to implement the Promise.all function. Unfortunately, my friend didn't play well on the spot and couldn't answer the question. After the interview, the interviewer rudely said to him: “Your foundation of JavaScript is…

Do you only use React? Do you know Vue? — Recently, my friend failed an interview simply because she was not familiar with Vue.js. She usually uses React most of the time at work, so she didn’t bother to learn about other front-end frameworks. Should we be familiar with all the front-end frameworks in the world? No, that is extremely…

A secret that most people don’t know. — Preface Recently, I participated in an interview that made a deep impression on me. After many twists and turns, I finally got the offer. You can’t imagine what I went through. 1. My interview process Interviewer： Please tell me what happened when “npm run xxx”? The more detailed the better. Me： I thought to myself…

Make your JavaScript more readable and extensible with these ES6 code tips. — Preface ES6 has brought us a lot of convenience in programming. The functions that used to be realized with a lot of code have now become very concise. This article summarizes 7JavaScript tricks I often use in my work, I hope it can help you too. 1. Find the max or min value in the array Sometimes, we need to find…

Regular expressions are worth learning for every front-end engineer — 1. Formatting money I often need to format money at work and using regex makes it really easy. const formatPrice = (price) => { const regexp = new RegExp(`(?!^)(?=(\\d{3})+${price.includes('.') ? '\\.' : '$'})`, 'g') return price.replace(regexp, ',') } formatPrice('123') // 123 formatPrice('1234') // 1,234 formatPrice('123456') // 123,456 formatPrice('123456789') // 123,456,789 formatPrice('123456789.123') // 123,456,789.123

Front-end engineers also need to learn algorithms I want to change to a new job. Before the interview, I prepared a lot of questions about front-end development, but I didn’t organize knowledge about algorithms. I thought I was very confident, but I didn’t expect to suffer a lot from the…

4 very useful React tips. — 1. Don’t forget to remove the listener when the component is Unmounting. We often need to listen to keyboard events, mouse events, etc. in useEffect of React. But we often forget to remove them. const windowScroll = () => { console.log('scroll') } useEffect(() => { window.addEventListener("scroll", windowScroll, false) }, []) Yes, when we return to this component, the scroll event will be…

Accelerating Your Path to Become a Programmer GitHub is one of our favourite sites that represents the spirit of open source. We can find free ebooks from there, discuss the most popular technical topics of the day, improve our coding skills, and more. In this post, I want to share…

Regular expressions are easy to learn — Preface Are you the kind of person who doesn’t want to learn regular expressions because they look complicated? Don’t worry, I used to be the same but not anymore. My boss once told me, “Can’t you learn such a simple regular expression?” In order to learn regular expressions, I read many…