5 Javascript concepts every developer should know

Every JavaScript developer should be familiar with these features that I am going to show in this article - modern JavaScript tips to improve your code.

1. let and const

To declare variables in JS, you can use three keywords - var, let, and const. However, it is now recommended to use let for variables whose values can change and const for constant values. Try using const for everything, and you’ll know when to use let.

2. String Interpolations

When working with strings, it’s common to interpolate them. An essential feature to know is template literals, which use the pattern ${variable} between backticks to interpolate strings or incorporate any value. Before this feature, concatenation was done using the + operator, which was often confusing.

3. Spread Operator

The spread operator allows you to easily manipulate arrays and objects in JavaScript to compose other arrays or objects.

4. Arrow Functions

Arrow functions provide a concise way to write anonymous functions in JavaScript. Note that this in arrow functions is not defined within the function but is inherited from the surrounding context.

5. Destructuring

Destructuring allows you to extract values from arrays or objects and assign them to variables conveniently.

In summary, understanding let and const, destructuring, arrow functions, string interpolation, and the spread operator significantly improves your JavaScript skills.

Thank you for taking the time to read this!