function foo(a) { var b = 2; function c() {} var d = function() {}; b = 3;}foo(1);代碼執(zhí)行之后AO = { arguments: { 0: 1, length: 1 }, a: 1, b: 3, c: function c(){}, d: reference to FunctionExpression "d"}請(qǐng)問為什么執(zhí)行代碼之后，b會(huì)變成3 b不是VO全局對(duì)象里面的嗎？
變量對(duì)象中全局變量為何覆蓋當(dāng)前函數(shù)的局部變量？
慕桂英3389331
2019-03-05 14:12:23