CODEWITHSUNDEEP
javascriptjquery
Rigil
Rigil

Reputation: 649

JS Function Wrapping

Consider the following two code examples:

// Example 1
$('#myButton').click(function() {
    alert('I was clicked');
});

// Example 2
$('#myButton').click(
    alert('I was clicked');
);

Why specifically does example 2 not work?

Upvotes: 0

Views: 45

Answers (1)

Frédéric Hamidi
Frédéric Hamidi

Reputation: 262949

Your second code snippet does not work because it invokes the alert() method of the window object (which returns undefined), and passes the value it returns (thus, undefined) as a handler to the click() method of a jQuery object.

undefined is not a valid event handler, so click() ignores it and does nothing (except maybe log an error to your console, depending on your browser).

Your first code snippet passes a genuine function that, in turn, invokes alert(). Since it is a function, it can be registered as an event handler.

Upvotes: 4

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