10 JavaScript String Tricks Every Developer Should Know

JavaScript strings are more than just a way to handle text — they’re a powerful tool with plenty of built-in methods to simplify your coding tasks. Here are 10 must-know tricks to help you harness the full potential of JavaScript strings.

Not a Medium member? Read this article here

1. Reverse a String in One Line

Reversing a string can be done with a simple combination of methods:

const reverseString = str => str.split('').reverse().join('');
console.log(reverseString("hello")); // Output: "olleh"

2. Check if a String Contains Another String

Using includes, you can quickly check for substrings:

const contains = str => str.includes("world");
console.log(contains("hello world")); // Output: true

3. Convert a String to Title Case

Capitalize the first letter of each word:

const toTitleCase = str => str.split(' ')
  .map(word => word.charAt(0).toUpperCase() + word.slice(1).toLowerCase())
  .join(' ');
console.log(toTitleCase("javascript string tricks")); // Output: "Javascript String Tricks"