Constraint validation APIMethods that validate form controls before submission, such as checkValidity(), reportValidity() and setCustomValidity().formsFormswidely2018-12-112021-06-11https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#the-constraint-validation-apiconstraint-validationhttps://developer.mozilla.org/docs/Web/API/ValidityStateapi.HTMLButtonElement.checkValidityapi.HTMLButtonElement.reportValidityapi.HTMLButtonElement.setCustomValidityapi.HTMLButtonElement.validationMessageapi.HTMLButtonElement.validityapi.HTMLButtonElement.willValidateapi.HTMLFieldSetElement.checkValidityapi.HTMLFieldSetElement.reportValidityapi.HTMLFieldSetElement.setCustomValidityapi.HTMLFieldSetElement.validationMessageapi.HTMLFieldSetElement.validityapi.HTMLFieldSetElement.willValidateapi.HTMLFormElement.checkValidityapi.HTMLFormElement.reportValidityapi.HTMLInputElement.checkValidityapi.HTMLInputElement.reportValidityapi.HTMLInputElement.setCustomValidityapi.HTMLInputElement.validationMessageapi.HTMLInputElement.validityapi.HTMLInputElement.willValidateapi.HTMLObjectElement.checkValidityapi.HTMLObjectElement.reportValidityapi.HTMLObjectElement.setCustomValidityapi.HTMLObjectElement.validationMessageapi.HTMLObjectElement.validityapi.HTMLObjectElement.willValidateapi.HTMLOutputElement.checkValidityapi.HTMLOutputElement.reportValidityapi.HTMLOutputElement.setCustomValidityapi.HTMLOutputElement.validationMessageapi.HTMLOutputElement.validityapi.HTMLOutputElement.willValidateapi.HTMLSelectElement.checkValidityapi.HTMLSelectElement.reportValidityapi.HTMLSelectElement.setCustomValidityapi.HTMLSelectElement.validationMessageapi.HTMLSelectElement.validityapi.HTMLSelectElement.willValidateapi.HTMLTextAreaElement.checkValidityapi.HTMLTextAreaElement.reportValidityapi.HTMLTextAreaElement.setCustomValidityapi.HTMLTextAreaElement.validationMessageapi.HTMLTextAreaElement.validityapi.HTMLTextAreaElement.willValidateapi.ValidityStateapi.ValidityState.badInputapi.ValidityState.customErrorapi.ValidityState.patternMismatchapi.ValidityState.rangeOverflowapi.ValidityState.rangeUnderflowapi.ValidityState.stepMismatchapi.ValidityState.tooLongapi.ValidityState.tooShortapi.ValidityState.typeMismatchapi.ValidityState.validapi.ValidityState.valueMissinghttps://nowyoucanuse.com/features--constraint-validation.html