Why is JavaScript not a mess?
Frontend Development Frustrations: A JavaScript Perspective
The common complaint that frontend development, particularly JavaScript, is a chaotic mess often stems from its flexibility. The ability to achieve the same outcome through multiple approaches, while powerful, can lead to inconsistent code quality.
This isn't entirely inaccurate. Unlike backend development, which often benefits from established frameworks and conventions, frontend best practices are more diffuse. Resources on optimal patterns are scattered, fostering diverse coding styles and making it challenging for newcomers to grasp optimal approaches.
Addressing the Misconception
The lack of readily apparent structure doesn't imply an absence of best practices. Effective JavaScript development hinges on leveraging established patterns and efficient methods. Abundant resources, such as the Mozilla Developer Network (MDN) JavaScript documentation, provide guidance on optimal implementations. The key is dedicated learning and applying this knowledge.
A Practical Code Example
Consider this real-world production code snippet (simplified for clarity): It functions correctly, but its structure could be significantly improved for readability and performance. The example focuses on basic array and object manipulation.
Initial Code (Less Ideal):
const storesList = [{ activeStories: [ { name: 'Starbucks', code: 1 }, { name: 'Duck Duck Coffe', code: 2 } ], inactiveStories: [ { name: 'Mac Coffe', code: 3 } ] }] storesList.reduce((previous, current) => { current.activeStories.forEach(store => { previous.push({ ...store, label: `Opened ${store.name}` }) }) return previous }, []) // result: // [ // { // "name": "Starbucks", // "code": 1, // "label": "Opened Starbucks" // }, // { // "name": "Duck Duck Coffe", // "code": 2, // "label": "Opened Duck Duck Coffe" // } // ]
This approach, using .reduce
and .forEach
, is unnecessarily verbose. JavaScript offers more efficient tools.
Improved Code:
storesList.flatMap((item) => { return item.activeStories }).map((item) => { return { ...item, label: `Opened ${item.name}` } })
This revised version utilizes .flatMap
to flatten the array and .map
to add the "label" property, resulting in cleaner, more concise code.
Conclusion
JavaScript offers a rich set of tools for crafting high-quality code. The key is dedicated learning and the application of appropriate techniques, rather than simply writing code for the sake of functionality.
Recommended Reading:
- [PT-BR] - https://www.php.cn/link/729404b28f3bd32761c667a668453f4c
- [EN] - https://www.php.cn/link/f5c80b20fdee4e645ff315a56f12a716
The above is the detailed content of Why is JavaScript not a mess?. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.

The latest trends in JavaScript include the rise of TypeScript, the popularity of modern frameworks and libraries, and the application of WebAssembly. Future prospects cover more powerful type systems, the development of server-side JavaScript, the expansion of artificial intelligence and machine learning, and the potential of IoT and edge computing.

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

JavaScript is the core language of modern web development and is widely used for its diversity and flexibility. 1) Front-end development: build dynamic web pages and single-page applications through DOM operations and modern frameworks (such as React, Vue.js, Angular). 2) Server-side development: Node.js uses a non-blocking I/O model to handle high concurrency and real-time applications. 3) Mobile and desktop application development: cross-platform development is realized through ReactNative and Electron to improve development efficiency.

This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing
