Is Emacs good for JavaScript?

Is Emacs good for JavaScript?

Emacs comes with a major mode for JavaScript named js-mode . While it is a good major mode, we’ll be using js2-mode instead, an external package that extends js-mode and provides a very interesting feature: instead of using regular expressions, it parses buffers and builds an AST for things like syntax highlighting.

Is Emacs good for web development?

Yes, people like using Emacs for web development. The above is just a sampling of modes people have written and use on a daily basis.

What is Emacs JavaScript?

emacs. js aims to be a ready-to-use Emacs setup for JavaScript coding. js-import Emacs package to automatically import JavaScript files from the current project or dependencies. js2-refactor a minor mode providing a collection of refactorings for JavaScript.

Is Emacs a GUI?

Emacs has two versions: the GUI version which runs in a separate window and has buttons and menus for common functions, and the text-based version which runs in your console window.

How do you mod JavaScript?

For two values of the same sign, the two are equivalent, but when the dividend and divisor are of different signs, they give different results. To obtain a modulo in JavaScript, in place of a \% n , use ((a \% n ) + n ) \% n .

What is strict JavaScript?

JavaScript’s strict mode, introduced in ECMAScript 5, is a way to opt in to a restricted variant of JavaScript, thereby implicitly opting-out of “sloppy mode”. Strict mode makes several changes to normal JavaScript semantics: Eliminates some JavaScript silent errors by changing them to throw errors.

Is Emacs a good tool for JavaScript development?

There’s a lot that can be done to make Emacs a great tool for JavaScript development. So much that I had to split it up into several posts. In this first article we’ll see how to setup js2-mode and two other packages that rely upon it: js2-refactor and xref-js2.

How do I install js2-mode in Emacs?

The easiest way to install js2-mode is via package.el ( Emacs Package Manager ). Also, you need to install ac-js2 for using js2-mode with auto-complete suggestion. Once installed, add this to your .emacs to activate js2 and its auto-complete. js2-mode comes with some useful utility functions for working with js files more efficiently.

How do I prevent Emacs from changing my hand-crafted config?

Emacs sometimes automatically writes settings to the init file. To prevent Emacs from changing your hand-crafted config, we can use two separate init files. The configuration below changes the automated configuration file’s name to custom.el and loads it when it exists. The line that starts with two semi colons is a comment which is not evaluated.

What is the js2-refactor command in Emacs?

This command is very similar to killing in paredit: It kills up to the end of the line, but always keeping the AST valid. Here’s a usage example of js2-refactor: renaming a function parameter and inlining a variable. xref-js2 adds support for quickly jumping to function definitions or references to JavaScript projects in Emacs (>= 25.1).