await can only be used in async functions . It is used for calling an async function and waits for it to resolve or reject. await blocks the execution of the code within the async function in which it is located.
Read moreWhat does async mean in Flutter?
An async function runs synchronously until the first await keyword . This means that within an async function body, all synchronous code before the first await keyword executes immediately.
Read moreWhat is async await used for?
await can be used on its own with JavaScript modules. Note: The purpose of async / await is to simplify the syntax necessary to consume promise-based APIs . The behavior of async / await is similar to combining generators and promises. Async functions always return a promise.
Read moreWhy we use async and await in Dart?
async keyword tells dart that this function might use asynchronous logic . So void main has the async keyword. await keyword tells dart that the following statement will return a Future . The Future should be completed and then the code below will be executed.
Read moreHow is Whencompleted () different from then () in Future?
whenComplete will fire a function either when the Future completes with an error or not, instead . then will fire a function after the Future completes without an error .
Read moreHow do you deal with Future in Flutter?
Sometimes you don’t want to turn the function into a Future or mark it async, so the other way to handle a Future is by using the . then function . It takes in a function that will be called with the value type of your Future. It’s similar to a Promise in JavaScript without the resolve, reject explicitness.
Read moreHow do you wait in Flutter?
seconds; timer. start(); // do something to wait for 2 seconds await Future. delayed(const Duration(seconds: 2), (){}); expect(timer. seconds, startTime – 2); });
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