How to Pass Objects from JavaScript to Chart.js through EJS

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The Problem

Here’s a brief look at the code setup you might have:

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

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

However, you noticed that the labels property returns null, resulting in an empty chart.

The Solution

Step 1: Accessing Object Properties

Your data variable is an array of objects. If you want to retrieve emp_id for each entry, you need to access it properly. You can achieve this by using template literals for dynamic evaluation within EJS. Here's how you can extract emp_id values:

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

Step 2: Creating a Labels Array

Instead of manually entering each emp_id, a more efficient way is to construct a separate labelsData array that will hold all the emp_id values. This can be done as follows:

Parse the EJS data into a usable JavaScript object.

Loop through the object array and push emp_id values into a new array.

Here's a code snippet demonstrating this approach:

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

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

Conclusion

If you're facing challenges passing object data to your charts, remember to always check how you're accessing and preparing that data before rendering it in your charts.

Feel free to explore this approach and enhance your charts with meaningful data visualizations!