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define( [ "./core", "./core/access", "./data/var/dataPriv", "./data/var/dataUser" ], function( jQuery, access, dataPriv, dataUser ) {
"use strict";
// Implementation Summary
//
// 1. Enforce API surface and semantic compatibility with 1.9.x branch
// 2. Improve the module's maintainability by reducing the storage
// paths to a single mechanism.
// 3. Use the same single mechanism to support "private" and "user" data.
// 4. _Never_ expose "private" data to user code (TODO: Drop _data, _removeData)
// 5. Avoid exposing implementation details on user objects (eg. expando properties)
// 6. Provide a clear path for implementation upgrade to WeakMap in 2014
var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/, rmultiDash = /[A-Z]/g;
function dataAttr( elem, key, data ) { var name;
// If nothing was found internally, try to fetch any
// data from the HTML5 data-* attribute
if ( data === undefined && elem.nodeType === 1 ) { name = "data-" + key.replace( rmultiDash, "-$&" ).toLowerCase(); data = elem.getAttribute( name );
if ( typeof data === "string" ) { try { data = data === "true" ? true : data === "false" ? false : data === "null" ? null :
// Only convert to a number if it doesn't change the string
+data + "" === data ? +data : rbrace.test( data ) ? JSON.parse( data ) : data; } catch ( e ) {}
// Make sure we set the data so it isn't changed later
dataUser.set( elem, key, data ); } else { data = undefined; } } return data; }
jQuery.extend( { hasData: function( elem ) { return dataUser.hasData( elem ) || dataPriv.hasData( elem ); },
data: function( elem, name, data ) { return dataUser.access( elem, name, data ); },
removeData: function( elem, name ) { dataUser.remove( elem, name ); },
// TODO: Now that all calls to _data and _removeData have been replaced
// with direct calls to dataPriv methods, these can be deprecated.
_data: function( elem, name, data ) { return dataPriv.access( elem, name, data ); },
_removeData: function( elem, name ) { dataPriv.remove( elem, name ); } } );
jQuery.fn.extend( { data: function( key, value ) { var i, name, data, elem = this[ 0 ], attrs = elem && elem.attributes;
// Gets all values
if ( key === undefined ) { if ( this.length ) { data = dataUser.get( elem );
if ( elem.nodeType === 1 && !dataPriv.get( elem, "hasDataAttrs" ) ) { i = attrs.length; while ( i-- ) {
// Support: IE 11 only
// The attrs elements can be null (#14894)
if ( attrs[ i ] ) { name = attrs[ i ].name; if ( name.indexOf( "data-" ) === 0 ) { name = jQuery.camelCase( name.slice( 5 ) ); dataAttr( elem, name, data[ name ] ); } } } dataPriv.set( elem, "hasDataAttrs", true ); } }
return data; }
// Sets multiple values
if ( typeof key === "object" ) { return this.each( function() { dataUser.set( this, key ); } ); }
return access( this, function( value ) { var data;
// The calling jQuery object (element matches) is not empty
// (and therefore has an element appears at this[ 0 ]) and the
// `value` parameter was not undefined. An empty jQuery object
// will result in `undefined` for elem = this[ 0 ] which will
// throw an exception if an attempt to read a data cache is made.
if ( elem && value === undefined ) {
// Attempt to get data from the cache
// The key will always be camelCased in Data
data = dataUser.get( elem, key ); if ( data !== undefined ) { return data; }
// Attempt to "discover" the data in
// HTML5 custom data-* attrs
data = dataAttr( elem, key ); if ( data !== undefined ) { return data; }
// We tried really hard, but the data doesn't exist.
return; }
// Set the data...
this.each( function() {
// We always store the camelCased key
dataUser.set( this, key, value ); } ); }, null, value, arguments.length > 1, null, true ); },
removeData: function( key ) { return this.each( function() { dataUser.remove( this, key ); } ); } } );
return jQuery; } );
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