Скачать или смотреть How to Dynamically Change Content with Select Options in JavaScript

Learn how to dynamically update your webpage content using JavaScript by interrelating select options with array items.
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This video is based on the question https://stackoverflow.com/q/67530213/ asked by the user 'Ocean' ( https://stackoverflow.com/u/14161125/ ) and on the answer https://stackoverflow.com/a/67530298/ provided by the user 'Roko C. Buljan' ( https://stackoverflow.com/u/383904/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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JavaScript: Dynamically Changing Content with Select Options

Are you looking to make your webpage more interactive? One of the ways you can do that is by updating content dynamically based on user selections. In this guide, we will explore how to interrelate select options with items stored in an array and change the displayed content on a button click. It's simpler than it sounds! Let's dive in.

Problem Statement

Imagine you have a web page where you want to display specific messages based on user choices. The messages you want to show are stored in an array, and you want to change the content of a div element dynamically whenever the user selects a different option from a dropdown. This task can be easily executed using a few lines of JavaScript.

Solution Overview

To achieve this, we will break our solution down into the following steps:

Set Up Your HTML Structure: This includes a div for displaying the content, a select dropdown, and a button to trigger the change.

Style the Elements (optional): Use CSS to make things look nice.

Write Your JavaScript: Handle the change events to update the displayed content.

Now, let's detail each of these steps.

Step 1: Set Up Your HTML Structure

Here's a simple HTML structure you'll need:

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

Step 2: Style the Elements (Optional)

You may want your div to look appealing. Let's add some CSS:

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

Step 3: Write Your JavaScript

Now, let's get down to the important part—dynamically changing the content using JavaScript:

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

Explanation of the JavaScript Code

Selecting Elements: We first select the elements we will work with: the div (# box), the select dropdown (# words), and the button (# change).

Function Definition: We define a function called populateBox that updates the inner HTML of the div with the current value of the select element.

Event Listener: We attach an event listener to the button which triggers the populateBox function when clicked. We also call populateBox immediately to set the initial text.

Conclusion

In this post, we've tackled how to dynamically update the content of a webpage using JavaScript by interrelating select options with items in an array. By following the structured steps provided, you can enrich your web applications with interactive features, making for a better user experience.

Feel free to apply this technique in your projects, and don't hesitate to reach out with questions or comments regarding this method. Happy coding!