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Ilya Kantor 2019-07-28 15:42:37 +03:00
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1-js/11-async/02-promise-basics/article.md
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@ -38,7 +38,7 @@ When the executor finishes the job, it should call one of the functions that it
- sets `state` to `"rejected"`,
- sets `result` to `error`.
![](promise-resolve-reject.png)
![](promise-resolve-reject.svg)
Later we'll see how these changes become known to "fans".
@ -60,7 +60,7 @@ We can see two things by running the code above:
After one second of "processing" the executor calls `resolve("done")` to produce the result:
![](promise-resolve-1.png)
![](promise-resolve-1.svg)
That was an example of a successful job completion, a "fulfilled promise".
@ -73,7 +73,7 @@ let promise = new Promise(function(resolve, reject) {
});
```
![](promise-reject-1.png)
![](promise-reject-1.svg)
To summarize, the executor should do a job (something that takes time usually) and then call `resolve` or `reject` to change the state of the corresponding Promise object.

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@ -0,0 +1,27 @@
<?xml version="1.0" encoding="UTF-8"?>
<svg width="512px" height="106px" viewBox="0 0 512 106" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<!-- Generator: sketchtool 55.2 (78181) - https://sketchapp.com -->
<title>promise-reject-1.svg</title>
<desc>Created with sketchtool.</desc>
<g id="promise" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
<g id="promise-reject-1.svg">
<path d="M9,34 L9,92 L184,92 L184,34 L9,34 Z" id="Rectangle-1" stroke="#E8C48E" stroke-width="2" fill="#FFF9EB"></path>
<text id="new-Promise(executor" font-family="PTMono-Regular, PT Mono" font-size="14" font-weight="normal" fill="#707175">
<tspan x="10" y="22">new Promise(executor)</tspan>
</text>
<text id="state:-&quot;pending&quot;-res" font-family="PTMono-Regular, PT Mono" font-size="14" font-weight="normal" line-spacing="20" fill="#8A704D">
<tspan x="21" y="54.4316406">state: "pending"</tspan>
<tspan x="21" y="74.4316406">result: undefined</tspan>
</text>
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<text id="reject(error)" font-family="PTMono-Regular, PT Mono" font-size="14" font-weight="normal" fill="#EE6B47">
<tspan x="201.4" y="49">reject(error)</tspan>
</text>
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<tspan x="337" y="55.4316406">state: "rejected"</tspan>
<tspan x="337" y="75.4316406">result: error</tspan>
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@ -0,0 +1,27 @@
<?xml version="1.0" encoding="UTF-8"?>
<svg width="512px" height="106px" viewBox="0 0 512 106" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<!-- Generator: sketchtool 55.2 (78181) - https://sketchapp.com -->
<title>promise-resolve-1.svg</title>
<desc>Created with sketchtool.</desc>
<g id="promise" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
<g id="promise-resolve-1.svg">
<path d="M9,34 L9,92 L184,92 L184,34 L9,34 Z" id="Rectangle-1" stroke="#E8C48E" stroke-width="2" fill="#FFF9EB"></path>
<text id="new-Promise(executor" font-family="PTMono-Regular, PT Mono" font-size="14" font-weight="normal" fill="#707175">
<tspan x="10" y="22">new Promise(executor)</tspan>
</text>
<text id="state:-&quot;pending&quot;-res" font-family="PTMono-Regular, PT Mono" font-size="14" font-weight="normal" line-spacing="20" fill="#8A704D">
<tspan x="21" y="54.4316406">state: "pending"</tspan>
<tspan x="21" y="74.4316406">result: undefined</tspan>
</text>
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<text id="resolve(&quot;done&quot;)" font-family="PTMono-Regular, PT Mono" font-size="14" font-weight="normal" fill="#EE6B47">
<tspan x="192" y="49">resolve("done")</tspan>
</text>
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<text id="state:-&quot;fulfilled&quot;-r" font-family="PTMono-Regular, PT Mono" font-size="14" font-weight="normal" line-spacing="20" fill="#417505">
<tspan x="338" y="55.4316406">state: "fulfilled"</tspan>
<tspan x="338" y="75.4316406">result: "done"</tspan>
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@ -0,0 +1,36 @@
<?xml version="1.0" encoding="UTF-8"?>
<svg width="512px" height="246px" viewBox="0 0 512 246" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<!-- Generator: sketchtool 55.2 (78181) - https://sketchapp.com -->
<title>promise-resolve-reject.svg</title>
<desc>Created with sketchtool.</desc>
<g id="promise" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
<g id="promise-resolve-reject.svg">
<rect id="Rectangle-1" stroke="#E8C48E" stroke-width="2" fill="#FFF9EB" x="9" y="91" width="170" height="70"></rect>
<text id="new-Promise(executor" font-family="PTMono-Regular, PT Mono" font-size="14" font-weight="normal" fill="#707175">
<tspan x="10" y="82">new Promise(executor)</tspan>
</text>
<text id="state:-&quot;pending&quot;-res" font-family="PTMono-Regular, PT Mono" font-size="14" font-weight="normal" line-spacing="20" fill="#8A704D">
<tspan x="21" y="115.431641">state: "pending"</tspan>
<tspan x="21" y="135.431641">result: undefined</tspan>
</text>
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<text id="resolve(value)" transform="translate(244.389895, 72.629682) rotate(-23.000000) translate(-244.389895, -72.629682) " font-family="PTMono-Regular, PT Mono" font-size="14" font-weight="normal" fill="#EE6B47">
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<tspan x="338" y="221.431641">result: error</tspan>
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