src/attributes/attr.js

   1 define([
   2         "../core",
   3         "../var/rnotwhite",
   4         "../core/access",
   5         "./support",
   6         "../selector"
   7 ], function( jQuery, rnotwhite, access, support ) {
   8
   9 var nodeHook, boolHook,
  10         attrHandle = jQuery.expr.attrHandle;
  11
  12 jQuery.fn.extend({
  13         attr: function( name, value ) {
  14                 return access( this, jQuery.attr, name, value, arguments.length > 1 );
  15         },
  16
  17         removeAttr: function( name ) {
  18                 return this.each(function() {
  19                         jQuery.removeAttr( this, name );
  20                 });
  21         }
  22 });
  23
  24 jQuery.extend({
  25         attr: function( elem, name, value ) {
  26                 var hooks, ret,
  27                         nType = elem.nodeType;
  28
  29                 // don't get/set attributes on text, comment and attribute nodes
  30                 if ( nType === 3 || nType === 8 || nType === 2 ) {
  31                         return;
  32                 }
  33
  34                 // Fallback to prop when attributes are not supported
  35                 if ( typeof elem.getAttribute === "undefined" ) {
  36                         return jQuery.prop( elem, name, value );
  37                 }
  38
  39                 // All attributes are lowercase
  40                 // Grab necessary hook if one is defined
  41                 if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
  42                         name = name.toLowerCase();
  43                         hooks = jQuery.attrHooks[ name ] ||
  44                                 ( jQuery.expr.match.bool.test( name ) ? boolHook : nodeHook );
  45                 }
  46
  47                 if ( value !== undefined ) {
  48
  49                         if ( value === null ) {
  50                                 jQuery.removeAttr( elem, name );
  51
  52                         } else if ( hooks && "set" in hooks &&
  53                                 (ret = hooks.set( elem, value, name )) !== undefined ) {
  54
  55                                 return ret;
  56
  57                         } else {
  58                                 elem.setAttribute( name, value + "" );
  59                                 return value;
  60                         }
  61
  62                 } else if ( hooks && "get" in hooks && (ret = hooks.get( elem, name )) !== null ) {
  63                         return ret;
  64
  65                 } else {
  66                         ret = jQuery.find.attr( elem, name );
  67
  68                         // Non-existent attributes return null, we normalize to undefined
  69                         return ret == null ?
  70                                 undefined :
  71                                 ret;
  72                 }
  73         },
  74
  75         removeAttr: function( elem, value ) {
  76                 var name, propName,
  77                         i = 0,
  78                         attrNames = value && value.match( rnotwhite );
  79
  80                 if ( attrNames && elem.nodeType === 1 ) {
  81                         while ( (name = attrNames[i++]) ) {
  82                                 propName = jQuery.propFix[ name ] || name;
  83
  84                                 // Boolean attributes get special treatment (#10870)
  85                                 if ( jQuery.expr.match.bool.test( name ) ) {
  86                                         // Set corresponding property to false
  87                                         elem[ propName ] = false;
  88                                 }
  89
  90                                 elem.removeAttribute( name );
  91                         }
  92                 }
  93         },
  94
  95         attrHooks: {
  96                 type: {
  97                         set: function( elem, value ) {
  98                                 if ( !support.radioValue && value === "radio" &&
  99                                         jQuery.nodeName( elem, "input" ) ) {
 100                                         var val = elem.value;
 101                                         elem.setAttribute( "type", value );
 102                                         if ( val ) {
 103                                                 elem.value = val;
 104                                         }
 105                                         return value;
 106                                 }
 107                         }
 108                 }
 109         }
 110 });
 111
 112 // Hooks for boolean attributes
 113 boolHook = {
 114         set: function( elem, value, name ) {
 115                 if ( value === false ) {
 116                         // Remove boolean attributes when set to false
 117                         jQuery.removeAttr( elem, name );
 118                 } else {
 119                         elem.setAttribute( name, name );
 120                 }
 121                 return name;
 122         }
 123 };
 124 jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( i, name ) {
 125         var getter = attrHandle[ name ] || jQuery.find.attr;
 126
 127         attrHandle[ name ] = function( elem, name, isXML ) {
 128                 var ret, handle;
 129                 if ( !isXML ) {
 130                         // Avoid an infinite loop by temporarily removing this function from the getter
 131                         handle = attrHandle[ name ];
 132                         attrHandle[ name ] = ret;
 133                         ret = getter( elem, name, isXML ) != null ?
 134                                 name.toLowerCase() :
 135                                 null;
 136                         attrHandle[ name ] = handle;
 137                 }
 138                 return ret;
 139         };
 140 });
 141
 142 });