You are developing a web form that includes the following HTML.
<input id=”txtValue” type=”text” />
You need to ensure that a value is entered into txtValue before the form is submitted.
Which code segment should you use?
A.
Option A
B.
Option B
C.
Option C
D.
Option D
Explanation:
Correct answer is A because:
1, to get value of an element the $(selector).val() is used (see http://api.jquery.com/val/)
2, condition in (A) if(name == null || name == “”) checks if name is not null or empty which makes sure that a value has to be entered
condition in B is more specific and tests whether the value is a number following certain pattern (e.g. 900,200.10) but ALSO EMPTY STRING WILL MATCH THE REGEX
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