React Js conditionally applying class attributes

React Js Conditionally Applying Class Attributes: A Simple Guide 😎

🤔 Are you having trouble conditionally showing and hiding a button group in your React Js component? Don't worry, we've got you covered! In this blog post, we'll walk you through the common issues that may arise when trying to conditionally apply class attributes in React Js, and provide you with easy and practical solutions. So let's dive right in!

The Problem 🤷‍♀️

The code snippet you shared indicates that you have a parent component passing a boolean value to the showBulkActions prop of the child component TopicNav. Based on this value, you want to show or hide the button group.

<TopicNav showBulkActions={this.__hasMultipleSelected} />

__hasMultipleSelected: function() {
  return false; // return true or false depending on data
}

However, despite using the conditional expression {this.props.showBulkActions ? 'show' : 'hidden'}, you're not seeing any changes in the rendered output. So, what's going wrong?

The Solution 🙌

The issue lies in the way you're trying to conditionally apply the class names to your button group. Instead of simply using the class names 'show' and 'hidden', you need to utilize Bootstrap's class names for visibility. Here's the corrected code:

<div className="row">
  <div className="col-lg-6">
    <div className={`btn-group pull-right ${this.props.showBulkActions ? 'dropdown show' : 'dropdown'}`}>
      {/* Rest of the button group code */}
    </div>
  </div>
</div>

By using the 'dropdown show' class name, you will ensure that the button group is visible when showBulkActions is true, and using just 'dropdown' will make it hidden when showBulkActions is false.

Example Explained ✍️

Let's break down the corrected code, so you understand what's happening:

1. We're using an ES6 template string, denoted by the backticks (`), to embed dynamic values in the className attribute.

2. The btn-group and pull-right classes are common Bootstrap classes and are not conditionally modified.

3. The $ sign in ${this.props.showBulkActions} signifies the start of an embedded expression.

4. If this.props.showBulkActions is true, the class name 'dropdown show' will be applied.

5. If this.props.showBulkActions is false, only the class name 'dropdown' will be applied.

Your Turn! 🚀

Now that you have the solution to your problem, give it a try in your code and see if it works for you! Remember to ensure that showBulkActions in your parent component is correctly returning the desired boolean value.

Feel free to ask further questions or share your experience in the comments section below. We'd love to hear from you!

Wrapping Up 🎉

In this blog post, we addressed the common issue of conditionally applying class attributes in React Js. We provided you with an easy-to-understand solution and explained each step with code examples.

We hope this guide helped you overcome the problem you were facing. If you found it useful, don't hesitate to share it with others who might be dealing with similar issues. Sharing is caring!

Now go ahead, apply those class attributes conditionally, and make your React Js components more dynamic and interactive! 💪