The PnP TaxonomyPicker reusable control doesn’t have a property to let you mark the input control as a required field on a form, but fortunately, this can be easily addressed.
If you have used the PnP TaxonomyPicker reusable control before, you may have noticed that it doesn’t have a property to make it required, nor does it have a property that lets you add a custom CSS class to it. The problem is that your other required input controls on the form will have a ‘*’ after the label, but not the TaxonomyPicker controls.
But there is a very simple way to solve this because the control also has a Label control, so we can mimic the styles from other Office UI Fabric input controls.
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