See the Demo @Code Pen A check box group allows the user to select multiple options.A common validation for such an input would be to limit the options that can be selected (minimum /maximum to be selected).Its value can be either a single string (provided both parts of the comprison above are strings), as an array with the comparison and reference date as elements, or as an object with the comprison as its attribute and the reference date as that value.
Here are some common text pattern validations: See the demo @Code Pen Doing a ‘required’ validation for a Dropdown list is a bit tricky.
Dropdown list will always have one item always selected.
Using a library to do form validation can save lots of your development time. j Query Form validation library is the most popular validation library.
This post collects all my notes and references on j Query Form validation library.
The comparison is one of the following: 'equal' or 'same' or 'eq', 'not Equal' or 'not Same' or 'ne', 'less Than' or 'before' or 'lt', 'greater Than' or 'after' or 'gt', 'not Less Than' or 'not Before' or 'ge', 'not Greater Than' or 'not After or 'le'.
The reference date can be given as a call with the name 'dp Compare Date'.Common validations for text field are ‘required’, minlength, maxlength or matching with a text pattern for a pattern In the example code above, validation to mean: “the input always needs to be of x characters or more” This is for numeric inputs – when you wan to to check whether the input falls in a certain numeric range.For example, if the input should be greater than or equal to 10 then the validation is See the demo @Code Pen Common text input patterns like email, URL, decimal number etc are available “ready to use” in the library. also contains a ‘pattern’ validation where you can give a regular expression as a parameter.You can use the minlength/maxlength/rangelength validations for check box group as well.Just like the radio group, checkbox group also requires some custom error placement to make it look good. It may be required in certain cases you want to ignore the validations of an element.Have an option with label like ‘Select …’ and the option value empty. Then you can apply the ‘required’ validation to the Dropdown list.