Скачать или смотреть How to Hide div if Value is null in Vue.js with Laravel

Learn how to effectively hide a div in Vue.js when the value of a variable is null or empty, especially in your Laravel applications.
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This video is based on the question https://stackoverflow.com/q/63340261/ asked by the user 'user3653474' ( https://stackoverflow.com/u/3653474/ ) and on the answer https://stackoverflow.com/a/63340291/ provided by the user 'Majed Badawi' ( https://stackoverflow.com/u/7486313/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Hide a div if Value is null in Vue.js with Laravel

In today’s guide, we’ll tackle a common issue that many developers encounter while working with Vue.js and Laravel. If you find that a specific div remains visible even when its related variable is null or empty, this guide will show you how to properly handle that scenario with a straightforward solution.

Understanding the Problem

Imagine that you have a user profile page that displays various details about a user. It's common to want different pieces of information to appear conditionally based on the data you have. For example, if the Item.date property in your Vue instance is null or an empty string, you may not want to show that user’s date information at all. Instead, you want the div to be hidden.

Example of the Issue

You might start with something like this:

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

However, this code will not effectively hide the div when Item.date is null. As you may have already experienced, it still displays, leading to confusion for the users of your application.

The Solution

To elegantly hide a div based on whether a value is present or not, we can leverage Vue.js's v-if directive. This directive allows you to conditionally include or exclude elements based on the truthiness of an expression you provide. Here’s how you can use it effectively:

Revised Code Example

Replace the previous code with this:

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

Breakdown of the Solution

v-if="Item && Item.date": This checks two things:

Whether Item exists to avoid errors in case Item is undefined.

Whether Item.date contains a value that is both not null and not an empty string, ensuring that only valid content is displayed.

Benefits of Using v-if

Cleaner Code: Using v-if creates cleaner and more readable code, making it easier to manage and understand.

Improved Performance: Elements controlled by v-if are not rendered in the DOM until the condition is met, suppressing unnecessary HTML when no data is available.

Conclusion

By switching from v-show to v-if in your Vue.js components, you can efficiently manage the visibility of elements based on the state of your data. Whether you're developing in Laravel or any other framework, understanding how to conditionally render HTML is crucial for creating dynamic and responsive web applications.

Give this solution a try, and you’ll find that it greatly improves your application's user experience!