18 JavaScript Tips : You Should Know for Clean and Efficient Code

In this post, I’ll share 18 JavaScript tips, with examples that you should know for writing clean and efficient code.

Let’s get started!šŸš€

Arrow Function

You can use arrow functions to simplify function declarations.

For example:


TheĀ Array.from()Ā method can be used to convert any iterable objects into arrays.

Display Data with console.table()

If you want your data organized or in tabular format in the console, then you can useĀ console.table().



Use const and let effieciently

UseĀ constĀ for variables that won’t be reassigned andĀ letĀ for those that will, for better code organization.

Extract Object Properties with Destructuring

By using destructuring to extract properties from objects, you can enhance code readability.

Set Default Values with Logical OR Operator

Set default values easily using theĀ ||Ā operator.

Effortlessly Empty an Array

You can empty an array easily by using the length property.

For example:


UseĀ JSON.parse()Ā to convert a JSON string into a JavaScript object, this ensures seamless data manipulation.

Map() Function

Use the map() function to transform elements in a new array without modifying the original array.

For example:


You can useĀ Object.seal()Ā method to prevent adding or removing properties in theĀ object.


You can useĀ Object.freeze()Ā method to prevent any changes to anĀ object, including adding, modifying or deleting properties.

Remove Array Duplicates

You can remove duplicate elements from an array usingĀ Set.

Swap values using Destructuring

You can swap two variables easily using destructuring.

For example:

Spread Operator

You can copy or merge arrays efficiently using the spread operator.

For example:

Template Interpolation

Utilize template literals for string interpolation and enhanced code readability.

For example:

Ternary Operator

You can simplify conditional statements with the ternary operator.

Use === Instead of ==

Prevent type coercion issues by using strict equality (===) instead of loose equality (==).

Use Descriptive Variable and Function Names

Use meaningful and descriptive names for variables and functions to enhance code readability and maintainability.

Thatā€™s all for today.

I hope it was helpful.

Thanks for reading.

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