I’m using PHP to validate and run my form, however, I want to check elements as they are filled out. How do I check an element for its current value prior to the submission of the form?
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I’m using PHP to validate and run my form, however, I want to check elements as they are filled out. How do I check an element for its current value prior to the submission of the form?
Documents have a forms collection, forms have an elements collection, elements that are form controls have associated DOM properties such as value, checked, selected and so specified in their related interfaces (e.g. HTMLInputElement, HTMLSelectElement) that can be compared to allowed values and ranges.
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