IgxInputGroup resourceStrings does not keep default values for unspecified entries in v22

[jsakamotoIGJP]

Description

I found a localization issue in IgxInputGroup after upgrading Ignite UI for Angular from v21 to v22.

In v21, when I set only some properties in IInputResourceStrings, like below,

<igx-input-group type="line" [resourceStrings]="resourceStrings">
    <input igxInput type="file" />
</igx-input-group>

public resourceStrings: IInputResourceStrings = {
  igx_input_file_placeholder: '(localized text)',
}

the other properties still used their default values.
 
However, after upgrading to v22, unspecified properties no longer use their default values. Instead, they become empty strings.
 
For example, if I set only igx_input_file_placeholder and do not set igx_input_upload_button, the upload button text was shown as "BROWSE" in v21.

In v22, the button text is empty.

Framework

Angular

Angular Version

22.0.0

Ignite UI for Angular Version

22.0.0

Component / Area

Other

Browser

Other, Edge

Operating System

Windows

Command Not Working

Steps to Reproduce

1. Create an IgxInputGroup with an input of type "file".
2. Set the resourceStrings property with only igx_input_file_placeholder.
3. Do not set igx_input_upload_button.
4. Run the application.
5. Compare the behavior between v21 and v22.

Actual Result

The upload button text is empty when igx_input_upload_button is not specified in resourceStrings.

Expected Result

Unspecified resource string entries should continue to use their default values.
 
For example, when igx_input_upload_button is not specified, the default text "BROWSE" should be shown.

Reproduction URL

No response

Attachments

• 📦c-00247242-ngapp1 - v21.zip
• 📦c-00247242-ngapp1 - v22.zip

[skrustev]

Note: This is reproduced only in 21.0.x. The change that introduces this issue is from 21.1.x onwards.