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Ilya Kantor 2019-09-02 21:50:44 +03:00
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1-js/11-async/02-promise-basics/article.md
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@ -44,7 +44,7 @@ So the executor eventually moves `promise` to one of these states:
Later we'll see how "fans" can subscribe to these changes. Later we'll see how "fans" can subscribe to these changes.
Here's an example of a Promise constructor and a simple executor function with delayed "producing code" (via `setTimeout`): Here's an example of a promise constructor and a simple executor function with "producing code" that takes time (via `setTimeout`):
```js run ```js run
let promise = new Promise(function(resolve, reject) { let promise = new Promise(function(resolve, reject) {
@ -57,7 +57,7 @@ let promise = new Promise(function(resolve, reject) {
We can see two things by running the code above: We can see two things by running the code above:
1. The executor is called automatically and immediately (by the `new Promise`). 1. The executor is called automatically and immediately (by `new Promise`).
2. The executor receives two arguments: `resolve` and `reject` — these functions are pre-defined by the JavaScript engine. So we don't need to create them. We only should call one of them when ready. 2. The executor receives two arguments: `resolve` and `reject` — these functions are pre-defined by the JavaScript engine. So we don't need to create them. We only should call one of them when ready.
After one second of "processing" the executor calls `resolve("done")` to produce the result: After one second of "processing" the executor calls `resolve("done")` to produce the result: