Closed harifaking closed 1 year ago
function foo() { console.log(a); a = 1; }
foo(); // ???
function bar() { a = 1; console.log(a); } bar(); // ??? 第一段不报错啊，刚试过了，会打印1
function foo() { console.log(a); a = 1; }
foo(); // ???
function bar() { a = 1; console.log(a); } bar(); // ??? 第一段不报错啊，刚试过了，会打印1