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Discover the step-by-step process to effectively use Angular's translate service to dynamically translate text values in arrays.
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How to Assign Translated Values to Text Variables in Angular Arrays

When working with Angular applications that require localization, one common challenge developers face is translating static text in arrays. Specifically, if you're using a wizard-like interface that presents multiple steps, you might be wondering how to properly use Angular's translateService to assign translated text to an array.

In this guide, we will address this problem and provide a clear solution for translating text values within an array using Angular’s translation service.

Understanding the Problem

Suppose you have a wizardStep array that needs to include translated values for its items. The original code looks like this:

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

The Complication

The complication arises when attempting to translate text fields. Using translate.instant does not work reliably because it returns the key instead of the translated value, particularly if the translations are not loaded yet.

For instance:

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

In this case, you aren't able to get the translated value immediately, as it depends on loading and asynchronous retrieval of translation strings.

The Goal

Your goal is to get the translated strings dynamically and assign them to the text fields of each step in the steps array. You might find yourself uncertain of how to subscribe to the translation observable and update the text property accordingly.

The Solution

Step 1: Initialize the Array

Instead of pre-filling your steps array with static text, start by initializing it as an empty array. This allows you to populate it with translations later.

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

Step 2: Use ngOnInit() Lifecycle Hook

Next, you will use the Angular lifecycle hook ngOnInit to populate the steps array with translated text. This is achieved through subscribing to the translation observable:

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

Step 3: Explanation of the Code

Here's a breakdown of how this works:

translate.get('key'): This calls the translation service to fetch the translation for the given key.

.subscribe(): This method is used to get the translated text once it is loaded. The subscription waits for the asynchronous operation to complete.

push: When the text is received, we push a new object with the translated text into the steps array.

Final Result

By the end of the above steps, your steps array will be correctly populated with the translated text upon initialization. This will ensure your application displays localized text dynamically.

Conclusion

Handling translations in Angular can seem complicated initially, especially when dealing with arrays and asynchronous operations. However, by following the steps outlined in this guide, anyone can manage dynamic translations in their Angular applications effectively.

If you've run into issues with translations before, we hope this guide helps you simplify the process and enhances your user experience. Happy coding!