How to Remove Dynamically Created Rows in a JavaScript Table

Learn how to dynamically remove rows from an HTML table using JavaScript when a user interacts with buttons. Perfect for interactive web applications!
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How to Remove Dynamically Created Rows in a JavaScript Table

When developing interactive web applications, such as games or real-time data displays, encountering dynamic content is common. One situation you might face is needing to remove a row from an HTML table when a user interacts with it, like clicking a button. Below, we’ll explore how to accomplish this task using JavaScript in a clear and straightforward manner.

The Problem

Suppose you are creating a game using the Otree framework, where sellers send offers to buyers through a table interface. Each time a new offer is made, a new row is added to a table. When a user accepts an offer by clicking a button, that particular row should be removed from the table. This requires creating an effective way to reference and remove the specific row related to the clicked button.

Here’s a basic example of how the HTML structure looks:

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

In your JavaScript code, you add new offers like this:

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

The Solution

To enable the removal of a table row when a button is clicked, you can pass a reference to the button itself as a parameter to the acceptOffer() function. This approach allows you to navigate the DOM and find the corresponding row easily. Here’s how to do it:

Step 1: Modify the Button

Update your button’s onclick attribute to pass this to the acceptOffer() function:

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

Step 2: Define the Accept Function

Now, define the acceptOffer() function. This function will use the reference to the button to find its parent elements and remove the row:

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

Alternative Method

Alternatively, you can navigate the DOM in the function using multiple parentNode references. This method can be particularly useful if you prefer to be explicit about the structure:

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

Understanding the Code

el Parameter: The el argument in the function is a reference to the button that was clicked.

Navigating the DOM:

Using removeChild() on the parent node allows for the effective deletion of the row when the button is clicked, thus updating your table dynamically.

Conclusion

Handling dynamically created rows in a table using JavaScript doesn't have to be complicated. By using the this keyword to pass the button reference and navigating through the DOM with parentNode, you can efficiently remove rows that users interact with. This technique is essential for creating responsive and user-friendly web applications.

Implement the above code in your project, and you’ll be well on your way to managing dynamic tables with ease!