- JS词法作用域
function foo(){
console.log(a);
}
function bar() {
var a = 3;
foo();
}
var a = 2;
bar();
function foo(){
console.log(a);
}
function bar() {
var a = 3;
foo();
}
var a = 2;
bar();
本文标题:容易错误的js
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