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JavaScript jQuery Basics (2014) Creating a Password Confirmation Form Perform: Part 1

Posted by j Y
j Y
587 Points

whats the point of chaining .keyup() and .focus() when .keyup() gets the job done?

Can someone explain what the point of chaining keyup() and focus() is instead of just using keyup()? The instructor talks about keeping the code DRY so it seems redundant to chain those 2 methods when having only one gets the job done.

function passwordEvent(){
  if ($(this).val().length > 8) {
    $(this).next().hide();
  } else {
    $(this).next().show();
  }
}

$('#password').on("keyup", passwordEvent);

2 Answers

Ryan Field
PLUS
Ryan Field
Courses Plus Student 21,242 Points
Ryan Field
Ryan Field
Courses Plus Student 21,242 Points

You probably want to chain .keyup() and .focus() because you want to check whether the password is at least eight characters long not only when you type a key on the field, but when the field comes into focus (by clicking or tabbing).

Allison Walker
Allison Walker
17,137 Points
Allison Walker
Allison Walker
17,137 Points

Well, I tried it to find out.

If you take out the .focus(), you will get the error message as soon as you finish typing your first character. You could leave it at .keyup, but it's just not as good of an experience to show the error message after you've started typing as opposed to right before you begin typing. Like, you've started typing and then it goes, "...and, oh, by the way, make sure there are at least 8 characters."