代码示例：
<script type="text/javascript">
new Promise(function(resolve, reject) {
console.log(111);
resolve(222);
}).then(function(value) {
console.log(value);
return 333;
}).then(function(value) {
console.log(value);
throw "An Error";
}).catch(function(err) {
console.log(err);
}).finally(function(){
console.log("End");
});
</script>
标签：function,console,log,JavaScript,value,学习,Promise From： https://www.cnblogs.com/Tpf386/p/17579653.html