How Can You Check for a #hash in a Url Using Javascript?

As a JavaScript developer, you may come across situations where you need to check for a #hash in a URL. Whether you want to perform specific actions based on the presence of a hash or manipulate the URL itself, JavaScript provides multiple solutions to achieve this.

1. Using the window.location Object

The window.location object in JavaScript provides information about the current URL. To check for a #hash in the URL, you can access the hash property of the location object.

// Get the current URL
const url = window.location.href;

// Check if the URL contains a #hash
if (url.includes('#')) {
  console.log('URL contains a #hash');
} else {
  console.log('URL does not contain a #hash');
}

2. Using the URL API

The URL API is a built-in JavaScript API that allows you to work with URLs more easily. You can create a new URL object using the current URL and then access the hash property to check for a #hash.

// Get the current URL
const url = new URL(window.location.href);

// Check if the URL contains a #hash
if (url.hash) {
  console.log('URL contains a #hash');
} else {
  console.log('URL does not contain a #hash');
}

3. Using Regular Expressions

If you prefer using regular expressions, you can match the URL against a pattern that includes the #hash.

// Get the current URL
const url = window.location.href;

// Create a regular expression pattern
const pattern = /#(.+)/;

// Check if the URL matches the pattern
if (pattern.test(url)) {
  console.log('URL contains a #hash');
} else {
  console.log('URL does not contain a #hash');
}

These are three different approaches you can use to check for a #hash in a URL using JavaScript. Choose the one that suits your needs and integrate it into your code.