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Fixed typos and made grammar changes.
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Abdullah Manzoor 2019-04-15 16:15:42 +01:00 • committed by GitHub
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@ -24,7 +24,7 @@ async function f() {
f().then(alert); // 1 f().then(alert); // 1
``` ```
...We could explicitly return a promise, that would be the same: ...We could explicitly return a promise, that would be the same as:
```js run ```js run
async function f() { async function f() {
@ -72,7 +72,7 @@ Let's emphasize: `await` literally makes JavaScript wait until the promise settl
It's just a more elegant syntax of getting the promise result than `promise.then`, easier to read and write. It's just a more elegant syntax of getting the promise result than `promise.then`, easier to read and write.
````warn header="Can't use `await` in regular functions" ````warn header="Can't use `await` in regular functions"
If we try to use `await` in non-async function, that would be a syntax error: If we try to use `await` in non-async function, there would be a syntax error:
```js run ```js run
function f() { function f() {
@ -250,7 +250,7 @@ async function f() {
f(); f();
``` ```
If we don't have `try..catch`, then the promise generated by the call of the async function `f()` becomes rejected. We can append `.catch` to handle it: If we don't have `try..catch` and a promise generated by the call of the async function `f()` becomes rejected. We can append `.catch` to handle it:
```js run ```js run
async function f() { async function f() {
@ -263,7 +263,7 @@ f().catch(alert); // TypeError: failed to fetch // (*)
*/!* */!*
``` ```
If we forget to add `.catch` there, then we get an unhandled promise error (and can see it in the console). We can catch such errors using a global event handler as described in the chapter <info:promise-error-handling>. If we forget to add `.catch` there, then we get an unhandled promise error (viewable in the console). We can catch such errors using a global event handler as described in the chapter <info:promise-error-handling>.
```smart header="`async/await` and `promise.then/catch`" ```smart header="`async/await` and `promise.then/catch`"