Angular: filtering on selected option and user entered value

I have a need to filter on a dataset. My form will look something like this:


<input type="text" name="select-option-value">

What I want to achieve is the user selects an option, say age for example. Then enter a value for age in the input box. Only when an option and value has been entered in the input box will the filtering be performed on both of these form elements.

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