Unleash the Power of JavaScript String Methods - Your Ultimate Cheat Sheet 🤯🔥

Ram Maheshwari ♾️ - Feb 1 '23 - - Dev Community

JavaScript strings are a powerful tool for manipulating text and working with data. To get the most out of your strings, you'll want to familiarize yourself with the various string methods available in JavaScript 🔥

In this article, I'll provide you with an ultimate cheat sheet for JavaScript string methods, making it easy to find exactly what you need to accomplish your goals 🚀

With clear code examples and descriptions, you'll learn how to use each method to perform common string operations like finding substrings, converting case, and removing whitespace 😎

Whether you're a seasoned JavaScript developer or just starting out, this cheat sheet will be a valuable resource for optimizing your string-based code ⚡

So, Let's get started 🤖


1) str.length : returns the length of a string.

JS str.length example


2) str.charAt(index) : returns the character at the specified index in a string.

JS str.charAT(index) example


3) str.indexOf(searchValue[, fromIndex]) : returns the index of the first occurrence of the specified value in a string.

JS str.indexOf(searchValue[, fromIndex] example


4) str.lastIndexOf(searchValue[, fromIndex]) : returns the index of the last occurrence of the specified value in a string.

JS str.lastIndexOf(searchValue[, fromIndex] example


5) str.substring(start[, end]) : returns a new string that is a substring of the original string.

JS substring(start[, end]) example


6) str.substr(start[, length]) : returns a new string that is a part of the original string.

JS str.substr(start[, length]) example


7) str.toLowerCase() : returns a new string with all characters in lower case.

JS str.toLowerCase() example


8) str.toUpperCase() : returns a new string with all characters in upper case.

JS str.toUpperCase() example


9) str.trim() : removes whitespace from both ends of a string

JS str.trim() example


10) str.replace(searchValue, replaceValue) : replaces all occurrences of the specified value in a string with another value.

JS str.replace(searchValue, replaceValue) example


Hope this is helpful ✨

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