Скачать или смотреть Creating a Dynamic Table with JavaScript: Update and Delete Rows Automatically

Learn how to build a `dynamic table` in JavaScript that updates existing rows with new values or removes rows when conditions are met.
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Building a Dynamic Table with JavaScript

In today's digital world, creating interactive and dynamic user interfaces can significantly enhance user experience. One common requirement encountered among developers is the need for a dynamic table that can update its rows based on user input. This guide will explain how to create such a table using HTML and JavaScript.

The Problem

The challenge here involves constructing a dynamic table that, upon user input, performs the following tasks:

It adds a new row with a name and number.

If the same name is entered again with a different number, it updates the existing row's number by adding the new value to the old one.

If the value reaches zero (or below), it deletes the row entirely.

Let’s explore how to solve this effectively using JavaScript.

Crafting the Solution

We’ll break down the solution into manageable steps.

Step 1: Basic HTML Structure

To start, we need to lay out a simple HTML structure that includes input fields for the name and number, a button to trigger the action, and a table to display the results.

Here’s the basic HTML code:

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

Step 2: JavaScript Function to Manage Rows

Now that we have our HTML structure, we need to create a JavaScript function that handles the logic for adding, updating, and deleting table rows.

Here’s the core function for managing rows:

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

Explanation of the Function

Gather input values: The function retrieves the values entered by the user for both name and stock.

Check for an existing entry: It checks if there’s already a row with the given name using the find method.

Update or delete rows as needed:

If the name exists, it adds the new stock value to the existing row.

If the resulting stock is 0 or lower, the row is removed.

If the name does not exist in the table, a new row is created and populated with the input values.

Conclusion

By following this approach, you can create a dynamic table that responds effectively to user inputs by either updating or deleting rows based on the provided conditions. This feature can be particularly useful in applications that require real-time data updates, such as inventories or resource management systems.

Implementing this dynamic feature will not only provide a robust user experience, but also allow for efficient data handling within your web application.

Now it's your turn! Try incorporating this dynamic table functionality into your next project and witness the improvement in user interaction.