How to Print an Array from JavaScript to an EJS Template

Learn how to effectively print an array of data from JavaScript to an EJS template with step-by-step guidance. Enhance your web application by displaying dynamic content seamlessly.
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This video is based on the question https://stackoverflow.com/q/70440993/ asked by the user 'Desesperado' ( https://stackoverflow.com/u/13429570/ ) and on the answer https://stackoverflow.com/a/70441478/ provided by the user 'jfriend00' ( https://stackoverflow.com/u/816620/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Print an Array from JavaScript to an EJS Template

When building web applications that rely on data retrieval, you may encounter situations where you need to display data pulled from a database. In this post, we'll walk through how to effectively print an array of data from JavaScript into an EJS (Embedded JavaScript) template. If you've faced issues like seeing [object Object] instead of the actual value, don't worry—we'll tackle that problem directly.

The Problem

You're developing a database-driven website where users can search for people profiles. In this specific case, you're trying to display a person's name retrieved from a database, but you're running into an issue where the output shows as [object Object]. Here’s a snippet of the code causing the confusion:

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

Your current template code is as follows:

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

The output from your console log is:

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

As it stands, the attempt to display person results in [object Object], which isn't what you want. So, how can you render the actual name "Jack" in your EJS template?

Understanding the Problem

The output you're seeing occurs because:

The EJS template cannot directly display objects.

When you try to render an object, JavaScript implicitly calls its .toString() method, which results in the string [object Object].

To properly display the intended data, you need to specifically refer to the properties of the objects contained within the array.

Solution Steps

Let’s break down the steps needed to properly display the name.

Step 1: Modifying the Backend Code

First, you need to decide how you want to pass the name to your template. Since the result from your query is an array of objects, you need to extract the first name from that array. You can do this by changing the line where you send data to the template:

Change this line in index.js:

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

to:

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

This adjustment pulls out the first object in the array, making it easier to access its properties in your template.

Step 2: Accessing the Name in EJS Template

Now, modify your EJS template so that it renders the specific property— in this case, name—from the object you've passed. Update your EJS code to:

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

This modification ensures that you correctly display "Jack" instead of [object Object].

Conclusion

By following these steps, you can easily render desired properties from objects in your EJS templates, enhancing your web application's functionality. Instead of displaying [object Object], you're now able to show specific values like names retrieved from your database queries.

Always remember:

Access properties directly in your EJS template.

If dealing with arrays, make sure to reference the correct indices or use loops appropriately.

By integrating these practices into your web development, you enhance both the user experience and the overall functionality of your application. Happy coding!

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