How to prepopulate the textbox once I clicked the textbox. Initially Textbox will be empty, only after I clicked it should get populated.
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Harshit's simple answer above is basically correct. But the real question here is, what's your use case? i.e. what actual functionality are you hoping to accomplish, and why?
Use case is simple.....I have a Textbox where I write some number, once I move out(UNFOCUS) of the textbox the text will be masked. after if I come back to the same textbox I need that text to be unmasked.
You can use the "masked" parameter on the a!textField() component. You *can* swap this value on and off depending on how other values change on the form, but there's nothing currently that can cause masking to automatically turn on or off depending on the field's focus status.
Thank you for your information.