Why Use a Style Guide?
A style guide is a set of rules and best practices that developers follow when writing code. A style guide helps ensure consistency in the codebase, makes code easier to read and understand, and reduces the likelihood of errors and bugs. A style guide also helps new developers onboard quickly and get up to speed with the codebase.
Choosing a Style Guide
The basic formatting of your code should be consistent and easy to read. Here are some guidelines to follow:
Use a Consistent Indentation
Indent your code with two or four spaces to make it easier to read. Be consistent with your indentation throughout your codebase.
Use Single Quotes or Double Quotes Consistently
Use either single quotes or double quotes consistently throughout your codebase. If you need to use a quote inside a string, use the other type of quote to avoid escaping.
Use Descriptive Variable Names
Use descriptive variable names that are easy to understand. Avoid single-letter variable names and abbreviations.
In addition to basic formatting, there are several best practices that you should follow to write clean and maintainable code.
Declare Variables Properly
Always declare variables with either
const for variables that do not change,
let for variables that can be reassigned, and
var for variables that need to be hoisted.
Use Strict Equality
Use strict equality (
===) instead of loose equality (
==) to compare values. Strict equality compares both the value and the type, whereas loose equality only compares the value.
Avoid Global Variables
Avoid using global variables as much as possible. Global variables can cause naming collisions and make it difficult to reason about the code.
Use Functions for Reusability
Use functions to encapsulate logic and promote reusability. Avoid writing long, complex functions that do multiple things.
Use Arrow Functions for Conciseness
Use arrow functions for concise function expressions. Arrow functions have a shorter syntax and do not bind their own
Handle Errors Properly
Always handle errors properly using try-catch blocks or promise rejections. Avoid using
try-catch blocks for flow control.