##### async function*
- `async function*`
- 创建一个绑定到给定名称的新异步生成器函数。
```js
async function* name(param0) {
statements
}
async function* name(param0, param1) {
statements
}
async function* name(param0, param1, /* …, */ paramN) {
statements
}
async function* foo() {
yield await Promise.resolve('a');
yield await Promise.resolve('b');
yield await Promise.resolve('c');
}
let str = '';
async function generate() {
for await (const val of foo()) {
str = str + val;
}
console.log(str);
}
generate();
// Expected output: "abc"
```