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Learn how to effectively set your Ace Editor to read-only mode in Angular 9 to prevent user inputs. Follow our step-by-step guide for a seamless approach!
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How to Set Ace Editor to Read Only Mode in Angular 9

If you're working on an Angular 9 application and using Ace Editor, you might encounter the need to display code without allowing users to make modifications. Setting Ace Editor to read-only mode allows you to achieve this, ensuring that users can view the code, but cannot edit it. However, many developers face challenges while implementing this feature, especially when facing issues with the read-only property not functioning as intended. In this guide, we will tackle those issues and provide a comprehensive guide on how to correctly implement read-only mode in Ace Editor.

Understanding the Problem

The problem arises when you want to display your Ace Editor in a way that users cannot change its contents. The typical implementation involves using the setReadOnly method, but sometimes, despite implementing this method, users can still type in the editor. This is primarily due to possible errors or conflicting code that may inadvertently override the read-only setting.

Solution: Set Ace Editor to Read-Only Mode

To set Ace Editor to read-only mode in your Angular 9 application, follow these steps carefully. We will break it down for clarity.

Step 1: Ensure Correct HTML Setup

First, ensure you have correctly set up your Ace Editor in the HTML file. It should look something like this:

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

Step 2: Configure the TypeScript File

Next, in your TypeScript file, you need to initiate the Ace Editor and set it to read-only mode. Here’s a sample code snippet to achieve this:

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

Step 3: Check for Common Errors

If you notice that the editor is still allowing input, there are a few common culprits:

Error Before setReadOnly: Verify if there are any errors prior to the setReadOnly(true) call. An error that occurs before this line might prevent it from executing properly.

Conflicting Code: Check if there is any other part of your code that sets the editor back to editable mode. Look for any instances of editor.setReadOnly(false) or similar calls.

Working Example

To further clarify, here’s a minimal working example demonstrating this setup:

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

This example loads the Ace Editor and correctly sets it to read-only mode, successfully preventing any input from users.

Conclusion

Setting Ace Editor to read-only mode in Angular 9 can be straightforward if you follow the outlined steps correctly. Always ensure that there are no conflicts within your code that could override the read-only settings, and check that your setup is correctly implemented. With these guidelines, you should now be able to implement this feature seamlessly, allowing users to view code without the risk of unintentional edits.

By making your code editor read-only, you maintain greater control over the user experience while providing a robust method for displaying syntax-highlighted code. Happy coding!