📅  最后修改于: 2022-03-11 15:01:07.943000             🧑  作者: Mango
function firstFunction(_callback){
// do some asynchronous work
// and when the asynchronous stuff is complete
_callback();
}
function secondFunction(){
// call first function and pass in a callback function which
// first function runs when it has completed
firstFunction(function() {
console.log('huzzah, I\'m done!');
});
}