Dexie.async()
Syntax
var myAsyncFunction = Dexie.async(function* () {
// Function body goes here.
// To await, use the yield keyword.
});
Return Value
Function
Description
Makes it possible to use async functions with modern browsers (Chrome, Firefox, Opera and Edge) without the need of a transpiler.
Table below shows how this maps to ES7 async / await.
| Using function*() and yield | Using async / await | |
| Declare async function | Dexie.async(function* () {}); | async function() {} |
| Declare+execute function | Dexie.spawn(function* () {}); | (async function() {})() |
| Await a Promise | yield p; | await p; |
| Declare Promise Generator | function* f (){} | N/A |
| Await Promise Generator | yield* fn(); | N/A |
Sample
var myAsyncFunction = Dexie.async(function* () {
var db = new Dexie("TestDB");
db.version(1).stores({foo: ',bar'});
try {
yield Dexie.delete("TestDB");
yield db.open();
yield db.foo.add({bar: "foobar"}, 1);
var items = yield db.foo.toArray();
console.log(items.length);
} finally {
db.close();
}
});
myAsyncFunction().catch(e => console.error(e));