How to Block JavaScript by Class Name in Firefox

The JavaScript language has a function that detects the user's browser. You use this function to block a script from running when your website readers use Firefox. This function lets you write browser-specific code, so users do not receive JavaScript errors when they use class code that is only specific for other browsers such as Internet Explorer or Chrome.

Instructions

1. Right-click the HTML file you want to use to detect the browser. Click "Open With" and select your preferred editor.

2. Create a variable that contains the browser name. The following variable contains "Firefox" if the user is using the Firefox browser:

   var browser = navigator.userAgent;

3. Create the "if" statement that excludes the Firefox browser when you use the JavaScript class. The following code creates the statement:

   if (browser != "Firefox")
   {

   }

   You place the class code within the brackets of the "if" statement. This if statement only runs the code if the browser is not Firefox.

4. Initialize the class in the if statement. The following code is an example of calling the "myClass" class in the JavaScript statement:

   var class = new myClass();

References

• Quirksmode: Browser Detect