jquery Operation checkbox the second time in Firefox cannot check the problem

The original code:

$('#checkAll'). Click (function () {varCurrent = $ ( This)                $('. CheckBox'). each (function () {debugger; if(Current. is(': Checked')) {                        $( This). attr ('checked',true); } Else {                        $( This). attr ('checked',false);            }                }); })

This allows the second tick of Firefox and Chrome to change the properties and the page display does not change. Baidu Discovery is the issue of the jquery version.

$ (' #checkAll '). Click (function () {                var = $ (This)                $ ('. CheckBox '). each (function () {                    debugger;                if (current.is (': Checked ')) {                $ (this). Prop (' checked ', true);                }-else {                $ (this). Prop (' checked ', false);                }                });            })

Replace attr with prop to solve.

jquery Operation checkbox the second time in Firefox cannot check the problem