CheckboxItem
의 DataValidation입니다.
// Add a checkBox item to a form and require exactly two selections. var checkBoxItem = form.addCheckboxItem(); checkBoxItem.setTitle('What two condiments would you like on your hot dog?'); checkBoxItem.setChoices([ checkBoxItem.createChoice('Ketchup'), checkBoxItem.createChoice('Mustard'), checkBoxItem.createChoice('Relish') ]); var checkBoxValidation = FormApp.createCheckboxValidation() .setHelpText(“Select two condiments.”) .requireSelectExactly(2) .build(); checkBoxItem.setValidation(checkBoxValidation);