How to show recommended fields in the form

1. How do you fill ensure all fields in HTML form?
2. How do you indicate required fields in web design?

How do you fill ensure all fields in HTML form?

$('#dynamic-form-fields input:required'). each(function() if ($(this). val() === '') alert('error please fill all fields! '); );

How do you indicate required fields in web design?

Required fields should be indicated with either a symbol or text, not just color. When providing an indicator for a required field, it should be placed right before the form field. This allows a screen reader to read the indicator to a screen reader user right before the user activates the field.