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Learn how to loop over a JSON array in JavaScript to display specific values in HTML based on conditions. Get step-by-step instructions and examples.
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Looping Over a JSON Array in JavaScript: Display Specific Values in HTML

When dealing with data in JavaScript, you might find yourself needing to display specific values from a JSON array in your HTML. This is a common requirement, especially when the data contains multiple key-value pairs and different types of items. In this guide, we will explore how to loop over a JSON array and conditionally display values in an HTML div element.

The Problem Statement

Consider this JSON array example:

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

The goal is to loop through this array and check if the type is either "Dresses" or "Sweatshirt", then display the respective values in an HTML div.

Step-by-Step Solution

1. Set Up Your HTML Structure

Start by creating the HTML structure where you will display your results. Here’s a basic example:

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

2. Write the JavaScript Code

Now, let’s write the JavaScript code to loop through the JSON array:

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

3. Explanation of the Code

JSON Array Initialization: We start by initializing the JSON array containing our data.

Getting the HTML Element: We get the HTML element where we want to display the results by using document.getElementById.

Looping Through the Array: We use the forEach method to loop through each item in the array.

Conditional Checks: Inside the loop, we check the type of each item. If it’s a "Sweatshirt", we create list items for the type and brand. If it’s "Dresses", we create list items for the type and length.

Appending to the HTML: Finally, we append these elements to the HTML ul to display them.

4. Testing Your Code

After implementing the above code in your JavaScript file, open your HTML file in a browser. You should see the type and corresponding values from the JSON array displayed correctly based on the specified conditions.

Conclusion

Looping over a JSON array in JavaScript to conditionally display values in HTML is a straightforward task. With the help of the forEach method and DOM manipulation techniques, you can dynamically create and display list items based on your JSON data structure.

Feel free to experiment with this code and customize it to fit your own use case!