tags which helps users to know whats to input. How to insert spaces/tabs in text using HTML/CSS? [A-Za-z0-9_]{1,15} Only lowercase letters and numbers; at least 5 characters, but no limit. The type attribute is used to define a date picker or control field. It makes no claim to accuracy and completeness. sign, add at least 2 letters from a to z: An element with type="search" that For maximum length html5 has an attribute => maxlength="15" and for only numbers you can use the pattern which you also used with a regular expression. An element with type="password" that must contain 8 or more ** This answer is with respect to HTML5 ** Allowing float or decimal values One issue with number inputs is that their step size is 1 by default — if you try to enter a number with a decimal, such as "1.0", it will be considered invalid. Instead we can use the pattern attribute that Chris Ferdinandi looked at a while back in a post all about constraint validation in HTML . There are so many other ways to force the input field to take input only numbers. It could partially or completely replace JavaScript input validation. Please use ide.geeksforgeeks.org, Tip: Use the global title attribute to describe the pattern to help the user. These attributes only apply to an input element if its type attribute is in a state whose definition declares that the attribute applies. (13) I need to make sure that a certain field only takes numbers as value. This is … How to restrict input box to allow only numbers and decimal point JavaScript? Example Patterns Username Patterns Only letters (either case), numbers, and the underscore; no more than 15 characters. The ideas in this directive are also applicable to other frameworks. Difference between