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Discover how to effectively implement `multiple conditions` in an If/Else statement in JavaScript, enhancing your search functionality with practical code examples.
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This video is based on the question https://stackoverflow.com/q/63472145/ asked by the user 'Qasim' ( https://stackoverflow.com/u/5460351/ ) and on the answer https://stackoverflow.com/a/63472184/ provided by the user 'T.J. Crowder' ( https://stackoverflow.com/u/157247/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Mastering JavaScript: How to Add More Than 2 Conditions in an If/Else Statement

When developing a web application, handling user inputs effectively is crucial, especially when creating a search functionality. A common issue developers face is figuring out how to check multiple conditions seamlessly within an If/Else statement in JavaScript. In this guide, we will explore a specific problem related to this topic and learn how to implement it correctly.

The Problem: Handling Multiple Conditions in Search Functionality

Imagine you have a simple search feature on your website where users can type in their location. Depending on the input, you want to show or hide specific divs on the page. You’re looking to achieve the following:

If the input is empty, show both the divs.

If the input matches a specific value (e.g., 'something something'), hide one div and show the other.

For any other input, show the second div and hide the first one.

Let’s take a look at the initial HTML and JavaScript code provided to achieve this functionality:

Existing HTML Code

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Existing JavaScript Code

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The Solution: Correcting the Conditions

The problem in the above code lies in the condition where you check if the input value is null:

[[See Video to Reveal this Text or Code Snippet]]

This condition will never return true, since the value of an HTML input element is always a string, either an empty string ("") or a valid string. To correctly implement the desired functionality, we need to revise the conditions as follows:

Revised JavaScript Code

[[See Video to Reveal this Text or Code Snippet]]

Breakdown of the Revised Code

Variable Assignment: We assign the value of the input to a variable (searchInput) for cleaner and more maintainable code.

Empty String Check: Instead of checking for null, we simply check if searchInput is equal to an empty string ("").

Specific Value Check: The condition for checking whether the input matches a specific string remains the same.

Default Behavior: For any other input case, we hide one div and show the other.

Conclusion

By making these adjustments, you enhance the functionality of your JavaScript code, allowing it to react appropriately based on user input. This way, your search feature will be more reliable, providing a better user experience. Mastering how to add multiple conditions in an If/Else statement unlocks the power of control flow in your applications, making them smarter and more intuitive.

Feel free to implement these changes in your own projects and see how effectively your search features respond to user interactions!