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Make sure that .data() (no args) returns a list of all the data- prop…

…erties as well. Also make sure that accessing a data- property via .data() doesn't cause it to change again at a later time (it should be static). Fixes #7222, #7223.
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jeresig committed Oct 17, 2010
1 parent a7d0b0b commit 8a5df39045292397a06d08b4fab2ad29819b5d44
Showing with 66 additions and 23 deletions.
  1. +45 −21 src/data.js
  2. +21 −2 test/unit/data.js
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@@ -135,7 +135,23 @@ jQuery.extend({
jQuery.fn.extend({
data: function( key, value ) {
if ( typeof key === "undefined" ) {
return this.length ? jQuery.data( this[0] ) : null;
var data = null;

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@jitter

jitter Oct 17, 2010

Contributor

JSLint doesn't like this. It now complains on Line 166 of src/data.js that data is already defined.

@jitter

jitter Oct 17, 2010

Contributor

JSLint doesn't like this. It now complains on Line 166 of src/data.js that data is already defined.

if ( this.length ) {
var attr = this[0].attributes, name;
data = jQuery.data( this[0] );
for ( var i = 0, l = attr.length; i < l; i++ ) {
name = attr[i].name;
if ( name.indexOf( "data-" ) === 0 ) {
name = name.substr( 5 );
dataAttr( this[0], name, data[ name ] );
}
}
}
return data;
} else if ( typeof key === "object" ) {
return this.each(function() {
@@ -152,26 +168,7 @@ jQuery.fn.extend({
// 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 ( typeof data === "string" ) {
try {
data = data === "true" ? true :
data === "false" ? false :
data === "null" ? null :
!jQuery.isNaN( data ) ? parseFloat( data ) :
rbrace.test( data ) ? jQuery.parseJSON( data ) :
data;
} catch( e ) {}
} else {
data = undefined;
}
}
data = dataAttr( this[0], key, data );
}
return data === undefined && parts[1] ?
@@ -196,4 +193,31 @@ jQuery.fn.extend({
}
});
function dataAttr( elem, key, data ) {
// If nothing was found internally, try to fetch any
// data from the HTML5 data-* attribute
if ( data === undefined && elem.nodeType === 1 ) {
data = elem.getAttribute( "data-" + key );
if ( typeof data === "string" ) {
try {
data = data === "true" ? true :
data === "false" ? false :
data === "null" ? null :
!jQuery.isNaN( data ) ? parseFloat( data ) :
rbrace.test( data ) ? jQuery.parseJSON( data ) :
data;
} catch( e ) {}
// Make sure we set the data so it isn't changed later
jQuery.data( elem, key, data );
} else {
data = undefined;
}
}
return data;
}
})( jQuery );
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@@ -184,14 +184,17 @@ test(".data(String) and .data(String, Object)", function() {
});
test("data-* attributes", function() {
expect(27);
expect(33);
var div = jQuery("<div>"),
child = jQuery("<div data-myobj='old data' data-ignored=\"DOM\"></div>");
child = jQuery("<div data-myobj='old data' data-ignored=\"DOM\" data-other='test'></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.attr("data-attr", "exists2");
equals( div.data("attr"), "exists", "Check that updates to data- don't update .data()" );
div.data("attr", "internal").attr("data-attr", "external");
equals( div.data("attr"), "internal", "Check for .data('attr') precedence (internal > external data-* attribute)" );
@@ -205,6 +208,22 @@ test("data-* attributes", function() {
child.data("ignored", "cache");
equals( child.data("ignored"), "cache", "Cached data used before DOM data-* fallback");
var obj = child.data(), check = [ "myobj", "ignored", "other" ], num = 0;
for ( var i = 0, l = check.length; i < l; i++ ) {
ok( obj[ check[i] ], "Make sure data- property exists when calling data-." );
}
for ( var prop in obj ) {
num++;
}
equals( num, check.length, "Make sure that the right number of properties came through." );
child.attr("data-other", "newvalue");
equals( child.data("other"), "test", "Make sure value was pulled in properly from a .data()." );
child
.attr("data-true", "true")
.attr("data-false", "false")

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