July 2003
Intermediate to advanced
896 pages
45h 43m
English
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8.8. Restricting the Maximum Field Length
Problem
You want to limit the length of the string input in a text field.
Solution
Set the text field’s maxChars
property.
Discussion
By default, an input text field allows a user to type in as many
characters as she desires. However, you may have good reason to want
to set a maximum. For example, if an input field prompts a user for
her two-character country code, you might want to prevent the user
from entering more than two characters. Setting the
maxChars property to a number limits the user
input to that many characters.
myTextField.maxChars = 6; // Maximum of six characters can be input
Set maxChars to null to allow
an entry of unlimited length.
See Also
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.