Tag: javascript

The front end

Analysis of some classic CSS layout problems for front-end development + interview escort

December 7, 2023

by Dr. Gregory Hughes

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Width and margin implementations. margin: 0 auto; The table tag is horizontally centered with margin left and right Auto. Use the table tag (or simply...

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The front end

Roman Digital Converter (FreeCodeCamp)

December 7, 2023

by Francesca Savage-Hope

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Create a hash table for the basic elements of Roman numerals and integers. Divide the target integer by each element in the hash table and...

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reading

[] = =! Why is the result of [] true

December 7, 2023

by Natalie Hale

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! Variables can be converted to Boolean type, null, undefined, NaN, and empty string (") are true, the rest are false.

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The front end

Event loop

December 7, 2023

by Patricia Randolph

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An execution environment for various functions. Before each function is executed, information about it is added to the execution stack. Before calling a function, create...

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The front end

JavaScript deep copy vs. shallow copy

December 7, 2023

by Matthew Brennan

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Both deep copy and shallow copy are for reference data types only. The shallow copy copies the object member by member, but only the memory...

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The front end

What is a closure?

December 7, 2023

by Kim Hamilton

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1) What is closure? The result of a function execution is an inner function referenced by an external variable. If the inner function holds a...

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The front end

Rxjs vs Promise

December 7, 2023

by Kate Flood

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The difference between Promises and Observables is emphasized in this paper. The goal is to make it easier to understand Observables if you already know...

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The front end

How can you effectively reduce unnecessary rendering using useContext

December 7, 2023

by Bradley Stanley

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When we use useContext for data flow management, every time the context is updated, all components that use the context are re-rendered. If we have...

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The front end

Remember a performance problem with vUE’s large form project

December 7, 2023

by Prerak Ghosh

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As a form engineer, I naturally wrote forms and forms day after day. When I thought there was no difficulty, an interesting situation occurred suddenly....

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The front end

Understand KMP algorithm notes

December 7, 2023

by 龍美玲

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KMP off-topic: just learned KMP algorithm, a face meng force, but after a day of thinking, searching for information, manual drawing simulation of what is...

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The front end

Experience front-end club for a year and a half & unicorn all seven companies experience essay | the nuggets technology

December 7, 2023

by David Gonzalez

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In the past 3 weeks, I have met 7 companies (Pinduoduo, Xiapi, Homework Gang, Simian Tutoring, Sensetime technology and Kuaishou), all of which are online...

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The front end

Download files in Vue

December 7, 2023

by Stephanie Parks

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VUE A button to download one or more files to download a file to download a file, use the A label click to download multiple...

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The front end

Record a front-end interview

December 7, 2023

by Nicole Mayo

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The above code outputs 7 because ++ takes precedence over +, so it equals (a++) + b. In fact, this question is to investigate the...

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The front end

JavaScript memory leak literacy

December 7, 2023

by Robert Cole

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What is a memory leak? The life cycle of memory: 1, allocate memory in JavaScript, developers can declare variable values, JavaScript can handle the allocation...

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The front end

Js review: SEVERAL methods to implement JS inheritance and advantages and disadvantages

December 7, 2023

by Ellie Taylor

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Constructor inheritance (call) prototype chain inheritance (prototype) Combination inheritance (call and object.create)

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The front end

Var const let differs from pass

December 7, 2023

by Logan Thompson

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ES6 introduces the concept of block scope, which makes JS richer. What is the difference between varconstlet and varconstlet? Var does not have a variable...

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The front end

Browser caching mechanism

December 7, 2023

by 高郁婷

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Cache mechanism 1. Before sending a request, the browser checks whether a strong cache policy is matched according to the expirse and cache-Control of the...

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The front end

Front-end Team Development code Specification (JS + VUE)

December 7, 2023

by Krish Bora

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It summarizes the commonly used JS writing specification in the development process, the use of design mode and the writing of the development agreement in...

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The front end

NPM Command-line tool development Guide

December 7, 2023

by Ms. Holly Steele

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Command-line tools are often used in front-end development, such as @babel/cli, vue-cli, creation-react-app, etc. So how do you create an NPM command-line tool? It's actually...

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The front end

Tesseract.js – Offline version of vUE application

December 7, 2023

by Sandra Priest

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Tesseract. js based vUE application offline version, vue+ Tesseract. js+offline, pure front-end Chinese OCR recognition

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The front end

Vue routing the router

December 7, 2023

by Dr. Andrew Palmer

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1. Install Vue Add Router 1.1 label 1.2 Dynamic Route Matching 1.3 Nested Routines by 1.4 2. Route Guard The navigation guard provided by vue-Router...

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The front end

Async /await = Promise + Generator: ES6 async triple state

December 7, 2023

by Douglas Perez

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Foreword Asynchrony is an important aspect of JavaScript. The main purpose of asynchrony is to "set aside" time-consuming code so that it does not block...

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The back-end

React SetState

December 7, 2023

by Chelsea Parrish DDS

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ReactComponent.prototype.'setState(... 'function which returns an object of state variables.this.updater.this.updater.ReactInstrumentation.de...

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The front end

The use of Lodash

December 7, 2023

by Zachary Taylor

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Lodash uses the installation browser environment: or Array chunk Splits an array into chunks of size and assembles these chunks into a new array. If...

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The front end

Array flattening and array decrement

December 7, 2023

by 孫哲瑋

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Principle: Through the join method will be converted into a dot separated string, in the use of split converted string into string array, through. If...

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The front end

Brief discussion on personal understanding of JavaScript Event Loop

December 7, 2023

by Edward Goddard

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This article is a summary of my personal understanding of EventLoop. The first thing to remember is that Javascript is a single-threaded language. Single-threaded means...

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The front end

Understand JavaScript inheritance

December 7, 2023

by Scott Hernandez

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Inheritance plays a crucial role in all kinds of programming languages, and is often used in JavaScript to build the base of the front-end engineering...

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The front end

Javascript review day 10

December 7, 2023

by Dale Cooke-Bishop

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Array: represents a collection of ordered data, each item has a sequential array between them using a literal: [], each item is separated by a...

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The front end

JavaScript: Execute the function immediately

December 7, 2023

by Badal Saran

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What is an immediate function? The JS immediate function mode is a syntax that allows your functions to be executed as soon as they are...

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The front end

Relearn JS(3): functions

December 7, 2023

by Peter Gledhill

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Function is the most widely used JS syntax, but in our daily use of the process of whether there is a real understanding of JavaScript...

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