正常:
var say = function(){
console.log('你好');
}
say();
有报错:
函数表达式的方式, 调用不能发生在定义之前, 否则会报错
Uncaught TypeError: say is not a function at 150.html:7
(anonymous) @ 150.html:7
say();
var say = function(){
console.log('你好');
}
正常:
var say = function(){
console.log('你好');
}
say();
有报错:
函数表达式的方式, 调用不能发生在定义之前, 否则会报错
Uncaught TypeError: say is not a function at 150.html:7
(anonymous) @ 150.html:7
say();
var say = function(){
console.log('你好');
}