JavaScript Best Practices

JavaScript best practices help developers write clean, readable, maintainable and reliable code.

What are JavaScript Best Practices?

Best practices are recommended techniques that help developers write better JavaScript code.

Following these practices makes applications easier to understand, maintain and debug.

1. Use Meaningful Variable Names

Variable names should clearly describe the data they contain. Avoid unclear names such as x, a or temp when a meaningful name can be used.

let studentName = "Rahul";
let courseName = "JavaScript";

console.log(studentName);
console.log(courseName);

2. Use const and let

Use const when a variable should not be reassigned and use let when its value needs to change.

const course = "JavaScript";

let score = 80;

score = 90;

console.log(course);
console.log(score);

3. Keep Functions Small and Focused

A function should ideally perform one clear task. Small functions are easier to read, test and reuse.

function calculateTotal(price, quantity) {

    return price * quantity;
}

let total = calculateTotal(100, 3);

console.log(total);

Important Best Practices