HTML5 defines a variety of new input types: sliders, number spinners, popup calendars, color choosers, autocompleting suggest boxes, and more.
The beauty of these elements is that you can use them now: for browsers that don't support a particular input type, there is automatic fallback to standard textfields.
In addition, since regular expressions analyze strings, numbers must first be translated to a string before they can be tested.
It is easier to use if statement to check whether the number is in range or not.
But I'm writing an interpreter so I should use regex to check the input number using regular expressions for validating numeric ranges is not recommended.
This includes a large bunch of sample code and a complete reference guide to all the built-in validation rules in the library.
If you skip the message for a validation, the default message is displayed.
But the input number must be in a range from -2055 to 2055 and I want to check this by using regular expression.
So is there anyway to write a regular expression to check whether a number is in (-2055, 2055) or not ?
There are two keys to understanding why the automatic fallback works consistently in all major browsers: (unless "foo" is a recognized input type or "bar" is a recognized attribute of the input element).
For each of the new input types, we present a high-level description, an overview of the syntax, a description of the main attributes, a summary of which current browsers support it, and an example you can experiment with in your browser.
For each type of input element, we use the code to detect if your browser supports it. You should normally supply all of value, min, and max.