In this Article we will go through how to replace all line breaks with br elements only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const nl2br = str => str.replace(new RegExp('\r?\n', 'g'), '<br>');

// In React
str.split('\n').map((item, index) => <React.Fragment key={index}>{item}<br /></React.Fragment>)

In this Article we will go through how to replace all tab characters with spaces only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const replace = (str, numSpaces = 4) => str.replaceAll('\t', ' '.repeat(numSpaces));

In this Article we will go through how to replace multiple spaces with a single space only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

// Replace spaces, tabs and new line characters
const replaceSpaces = str => str.replace(/\s\s+/g, ' ');

// Only replace spaces
const replaceOnlySpaces = str => str.replace(/  +/g, ' ');

In this Article we will go through how to replace the first given number of characters of a string with another character only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const mask = (str, num, mask) => `${str}`.slice(num).padStart(`${str}`.length, mask);

In this Article we will go through how to reverse a string only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const reverse = str => str.split('').reverse().join('');

In this Article we will go through how to get the file extension from a file name only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const ext = fileName => fileName.split('.').pop();

In this Article we will go through how to get the file name from a url only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const fileName = url => url.substring(url.lastIndexOf('/') + 1);

In this Article we will go through how to get the length of a string in bytes only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const bytes = str => new Blob([str]).size;

In this Article we will go through how to get the number of a character in a string only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const characterCount = (str, char) => str.split(char).length - 1;

In this Article we will go through how to make the first character of a string lowercase only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const lowercaseFirst = str => `${str.charAt(0).toLowerCase()}${str.slice(1)}`;