【jQuery api】isFunction()

时间：2021-11-29 22:07:57
【jQuery api】isFunction() 
 <!doctype html>

 <html lang="en">

 <head>

   <meta charset="utf-8">

   <title>jQuery.isFunction demo</title>

   <style>

   div {

     color: blue;

     margin: 2px;

     font-size: 14px;

   }

   span {

     color: red;

   }

   </style>

   <script src="https://code.jquery.com/jquery-1.10.2.js"></script>

 </head>

 <body>

 <div>jQuery.isFunction( objs[ 0 ] ) = <span></span></div>

 <div>jQuery.isFunction( objs[ 1 ] ) = <span></span></div>

 <div>jQuery.isFunction( objs[ 2 ] ) = <span></span></div>

 <div>jQuery.isFunction( objs[ 3 ] ) = <span></span></div>

 <div>jQuery.isFunction( objs[ 4 ] ) = <span></span></div>

 <script>

 function stub() {}

 var objs = [

   function() {},

   { x:15, y:20 },

   null,

   stub,

   "function"

 ];

 jQuery.each( objs, function( i ) {

   var isFunc = jQuery.isFunction( objs[ i ]);

   $( "span" ).eq( i ).text( isFunc );

 });

 </script>

 </body>

 </html>
 jQuery.isFunction( objs[ 0 ] ) = true

 jQuery.isFunction( objs[ 1 ] ) = false

 jQuery.isFunction( objs[ 2 ] ) = false

 jQuery.isFunction( objs[ 3 ] ) = true

 jQuery.isFunction( objs[ 4 ] ) = false

Description: Determine if the argument passed is a JavaScript function object.

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