2018年仍需使用Babel吗？前端JavaScript学习者的技术疑问

Great question—this is a super common confusion for folks moving past vanilla JS into modern JavaScript development. Let’s break this down clearly:

First, the Good News: Most ES6+ Works Natively Now #

Modern browsers (Chrome, Firefox, Edge, Safari 14+) support almost all core ES6 features out of the box:

• Arrow functions (() => {})
• let/const
• Template literals (`Hello ${name}`)
• Array/object destructuring
• Classes
• Promises

For small personal projects, prototypes, or apps targeting only up-to-date browsers, you can absolutely write ES6 code directly without Babel and it’ll run fine. No need to set up a build process just yet.

When You Still Need Babel #

That said, Babel isn’t obsolete—there are several scenarios where it’s still essential:

• Supporting older browsers: If your project needs to work with IE11, older Safari versions (pre-14), or legacy mobile browsers, Babel can transpile ES6+ code down to ES5, which these browsers understand.
• Using cutting-edge JS features: Features introduced after ES2015 (like optional chaining ?., nullish coalescing ??, private class fields, or top-level await) aren’t supported by all older browsers. Babel lets you use these today while ensuring compatibility.
• Working with frameworks or build tools: Most modern frameworks (React, Vue, Svelte) rely on Babel under the hood—especially for transpiling JSX (React’s syntax) or component-specific code. Tools like Webpack and Rollup also integrate seamlessly with Babel for bundling and optimizing code.
• Code optimization: Babel plugins can help minify your code, remove unused features (tree-shaking), and apply other optimizations to make your final bundle smaller and faster.

Should You Learn Babel? #

Yes, but you don’t need to dive deep right away:

1. Master ES6+ syntax first: Focus on understanding how arrow functions, classes, destructuring, etc., work natively. Build small projects with these features to get comfortable.
2. Learn Babel when you hit a need: When you start a project that requires browser compatibility, or when you start using a framework that uses Babel, that’s the perfect time to learn the basics:
   • How to set up a basic babel.config.json file
   • Using presets like @babel/preset-env to target specific browsers
   • How Babel integrates with build tools like Webpack
3. It’s foundational knowledge: Babel is a core tool in the modern JavaScript ecosystem. Even if you don’t write configs often, understanding what it does will help you debug issues (like why a feature works in Chrome but not Safari) and make sense of how your code is processed.

Final Takeaway #

You don’t need to use Babel for every single project, but it’s still worth learning the basics. It’s not something you have to tackle immediately—focus on ES6 syntax first, then pick up Babel when you encounter a scenario that requires it.

内容的提问来源于stack exchange，提问作者terreus