Validate State
Recompile HomePage.cls and open it in a Web browser. Now, if we attempt to submit the form with anything other than a pair of characters from A-Z in the State field, Zen does the following:
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Prevents the form from submitting.
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Highlights the State field on the form.
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Displays an Alert box. As part of its message, the box displays the value of the <text> element's invalidMessage attribute.
Here is how this appears in a browser:
