Pull data-* attributes into .data(). Original code by Andrée Hasson and Paul Irish...

diff --git a/src/data.js b/src/data.js
index 5404c93..f2cfc81 100644 (file)
--- a/src/data.js
+++ b/src/data.js
@@ -1,6 +1,7 @@
 (function( jQuery ) {
 
-var windowData = {};
+var windowData = {},
+       rnum = /^-?[0-9.]$/;
 
 jQuery.extend({
        cache: {},
@@ -142,8 +143,23 @@ jQuery.fn.extend({
                if ( value === undefined ) {
                        var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
 
+                       // Try to fetch any internally stored data first
                        if ( data === undefined && this.length ) {
                                data = jQuery.data( this[0], key );
+
+                               // If nothing was found internally, try to fetch any
+                               // data from the HTML5 data-* attribute
+                               if ( data === undefined && this[0].nodeType === 1 ) {
+                                       data = this[0].getAttribute( "data-" + key );
+
+                                       if ( data != null ) {
+                                               data = data === "true" ? true :
+                                                       data === "false" ? false :
+                                                       data === "null" ? null :
+                                                       rnum.test( data ) ? parseFloat( data ) :
+                                                       data;
+                                       }
+                               }
                        }
 
                        return data === undefined && parts[1] ?

diff --git a/test/unit/data.js b/test/unit/data.js
index 872bbb7..c7307bf 100644 (file)
--- a/test/unit/data.js
+++ b/test/unit/data.js
@@ -157,6 +157,74 @@ test(".data(String) and .data(String, Object)", function() {
        $elem.removeData();
 });
 
+test("data-* attributes", function() {
+       expect(19);
+       var div = jQuery("<div>"),
+               child = jQuery("<div data-myobj='old data' data-ignored=\"DOM\"></div>");
+               
+       equals( div.data("attr"), undefined, "Check for non-existing data-attr attribute" );
+
+       div.attr("data-attr", "exists");
+       equals( div.data("attr"), "exists", "Check for existing data-attr attribute" );
+               
+       div.data("attr", "internal").attr("data-attr", "external");
+       equals( div.data("attr"), "internal", "Check for .data('attr') precedence (internal > external data-* attribute)" );
+       
+       child.appendTo('#main');
+       equals( child.data("myobj"), "old data", "Value accessed from data-* attribute");
+
+       child.data("myobj", "replaced");
+       equals( child.data("myobj"), "replaced", "Original data overwritten");
+
+       child.data("ignored", "cache");
+       equals( child.data("ignored"), "cache", "Cached data used before DOM data-* fallback");
+
+       child
+               .attr("data-true", "true")
+               .attr("data-false", "false")
+               .attr("data-five", "5")
+               .attr("data-null", "null")
+               .attr("data-string", "test");
+       
+       equals( child.data('true'), true, "Primitive true read from attribute");
+       equals( child.data('false'), false, "Primitive false read from attribute");
+       equals( child.data('five'), 5, "Primitive number read from attribute");
+       equals( child.data('null'), null, "Primitive null read from attribute");
+       equals( child.data('string'), "test", "Typical string read from attribute");
+
+       child.remove();
+       
+       // tests from metadata plugin
+       function testData(index, elem) {
+               switch (index) {
+               case 0:
+                       equals(jQuery(elem).data("foo"), "bar", "Check foo property");
+                       equals(jQuery(elem).data("bar"), "baz", "Check baz property");
+                       break;
+               case 1:
+                       equals(jQuery(elem).data("test"), "bar", "Check test property");
+                       equals(jQuery(elem).data("bar"), "baz", "Check bar property");
+                       break;
+               case 2:
+                       equals(jQuery(elem).data("zoooo"), "bar", "Check zoooo property");
+                       equals(jQuery(elem).data("bar"), '{"test":"baz"}', "Check bar property");
+                       break;
+               case 3:
+                       equals(jQuery(elem).data("number"), true, "Check number property");
+                       equals(jQuery(elem).data("stuff"), "[2,8]", "Check stuff property");
+                       break;
+               default:
+                       ok(false, ["Assertion failed on index ", index, ", with data ", data].join(''));
+               }
+       }
+       
+       var metadata = '<ol><li class="test test2" data-foo="bar" data-bar="baz" data-arr="[1,2]">Some stuff</li><li class="test test2" data-test="bar" data-bar="baz">Some stuff</li><li class="test test2" data-zoooo="bar" data-bar=\'{"test":"baz"}\'>Some stuff</li><li class="test test2" data-number=true data-stuff="[2,8]">Some stuff</li></ol>',
+               elem = jQuery(metadata).appendTo('#main');
+       
+       elem.find("li").each(testData);
+       elem.remove();
+});
+
 test(".data(Object)", function() {
        expect(2);