Code for validating login textbox in

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Depending on your web browser, the “Range” input field will be displayed as a slider control to help users provide input more easily.

Custom validation needs to notify users in an accessible way as described in the User Notifications part of this tutorial.This is useful for specific types of data patterns such as telephone numbers, postal codes, and serial numbers.In the example below, the element specifies a particular format that matches car license plate (registration) numbers in Germany.Input errors, such as an incorrect email address, will be indicated using the web browser dialogs as in the previous example.attribute allows the use of regular expressions to specify custom formats for the input.

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