How do I fix: 🛑 Root Causes of the Error?

The main issue lies in the fact that location.hostname only returns the domain name without any subdomains, whereas location.host includes both the domain and port numbers.For example, if your application is hosted at example.com:8080, using location.hostname would return example.com, while using lo

How do I fix: Method 2: Using location.host with a port number check?

Step 1: Use the includes() method to check if the hostname includes the port number, such as example.com:8080.

Coding⏱️ 2 min read📅 2026-06-03

How to Fix: location.host vs location.hostname and cross-browser compatibility?

Q: Step-by-Step Verified FixesMethod 1: Using location.hostname with a wildcard subdomain check?

Step 1: Create a regular expression to match any subdomain, such as /^example//, and use it to check if the hostname matches.

Determine the most effective method for checking domain accuracy in cross-browser compatibility.

Quick Answer: Use `location.hostname` instead of `location.host` to ensure accurate domain checks across browsers, as it handles subdomains correctly and is compatible with Firefox and Chrome versions mentioned.

📋 Table of Contents

🛑 Root Causes of the Error
🛠️ Step-by-Step Verified Fixes
💡 Conclusion

To effectively identify the correct domain for your web application and ensure cross-browser compatibility, you must understand the differences betweenlocation.hostname and location.host.

🛑 Root Causes of the Error

The main issue lies in the fact that location.hostname only returns the domain name without any subdomains, whereas location.host includes both the domain and port numbers.
For example, if your application is hosted at example.com:8080, using location.hostname would return example.com, while using location.host would return example.com:8080.

🛠️ Step-by-Step Verified Fixes

Method 1: Using `location.hostname` with a wildcard subdomain check

Step 1: Create a regular expression to match any subdomain, such as /^example//, and use it to check if the hostname matches.

Method 2: Using `location.host` with a port number check

Step 1: Use the includes() method to check if the hostname includes the port number, such as example.com:8080.

💡 Conclusion

By using a combination of these methods, you can effectively identify the correct domain for your web application and ensure cross-browser compatibility.

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