Fix #12534. Don't die on browsers lacking getBoundingClientRect.

Author: dmethvin

src/offset.js

@@ -23,8 +23,8 @@ jQuery.fn.offset = function( options ) {
 
 	docElem = doc.documentElement;
 
-	// Make sure we're not dealing with a disconnected DOM node
-	if ( !jQuery.contains( docElem, elem ) ) {
+	// Make sure we have the API and we're it's not a disconnected DOM node
+	if ( typeof elem.getBoundingClientRect === "undefined" || !jQuery.contains( docElem, elem ) ) {
 		return { top: 0, left: 0 };
 	}
 

test/unit/offset.js

@@ -15,6 +15,15 @@ test("empty set", function() {
 	strictEqual( jQuery().position(), undefined, "position() returns undefined for empty set (#11962)" );
 });
 
+test("object without getBoundingClientRect", function() {
+	expect(2);
+
+	// Simulates a browser without gBCR on elements, we just want to return 0,0
+	var result = jQuery({ ownerDocument: document }).offset();
+	equal( result.top, 0, "Check top" );
+	equal( result.left, 0, "Check left" );
+});
+
 test("disconnected node", function() {
 	expect(2);