How to Pass an Array of Objects to Another Function in JavaScript onclick

Learn how to properly pass an array of objects to a function using JavaScript `onclick` events without errors.
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Passing an Array of Objects to Another Function in JavaScript

If you've ever tried to pass an array of objects to another function through an onclick event in JavaScript, you may have encountered some frustrating errors. Understanding how to properly structure your code can save you from running into issues like Uncaught SyntaxError: Unexpected identifier. In this guide, we'll explore the problem and present a clear solution that will help you work with arrays of objects effectively in your functions.

The Problem

Imagine you have two functions: btnA and btnB. Your goal is to pass an object from an array declared in btnA to btnB when a certain element is clicked. Here's what your initial implementation looks like:

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

This code may seem close to what you need, but when you try to click the generated div, you receive the following error:

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

So, what went wrong?

Understanding the Issue

When you pass the object directly inside the template literal, JavaScript converts the object into a string. This can lead to an output like [Object object], which certainly isn't what you want.

Why the Error Occurs

The template literal does not handle object structures directly.

The actual object keys are encapsulated in double quotes by the JavaScript JSON format, which might clash with HTML attributes using double quotes.

The Solution

To correctly pass an object from one function to another in this scenario, you need to use the JSON.stringify() method. This method transforms your object into a proper JSON string that can be safely passed through the onclick event handler.

Updated Code Example

Here’s how you can adjust your code to eliminate the error:

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

Key Changes Made

Using JSON.stringify(): This method converts the object into a JSON string format, allowing it to be passed correctly.

Single Quotes for onclick: Enclosing the onclick value in single quotes prevents conflicts with the double quotes used in JSON formatting.

Conclusion

By mastering the proper technique to pass arrays of objects in JavaScript functions, you open the door to more dynamic and interactive web applications. Remember to always use JSON.stringify() when dealing with objects in dynamic events like onclick to avoid syntax errors and unintended conversions. Happy coding!