Hello Bilal,
The MaskedTextBox accepts fixed-length input by definition. If you require variable (or unlimited) input length, you will need to use another widget. For example, if you will be supporting IE10+ and other contemporary browsers only, you can use the
pattern attribute with a plain <input> element. You can style standard textboxes to look like Kendo UI textboxes with the
k-textbox CSS class.
Regards,
Dimo
Telerik
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