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Promises chaining#194
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14 changes: 7 additions & 7 deletions1-js/11-async/03-promise-chaining/01-then-vs-catch/solution.md
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Stručná odpověď zní: **ne, nejsou ekvivalentní**: | ||
Rozdíl je v tom, že pokud ve`f1` nastane chyba, je zde ošetřena funkcí`.catch`: | ||
```js run | ||
příslib | ||
.then(f1) | ||
.catch(f2); | ||
``` | ||
...Ale zde ne: | ||
```js run | ||
příslib | ||
.then(f1, f2); | ||
``` | ||
Je to proto, že chyba je předána řetězem, ale ve druhém uvedeném kódu za`f1` žádný řetěz není. | ||
Jinými slovy, `.then`předá výsledky nebo chyby dalšímu `.then/catch`.V prvním příkladu je za ním`catch`, ale ve druhém není, takže chyba zůstane neošetřena. |
10 changes: 5 additions & 5 deletions1-js/11-async/03-promise-chaining/01-then-vs-catch/task.md
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#Příslib: thenoproti catch | ||
Jsou tyto fragmenty kódu ekvivalentní? Jinými slovy, chovají se zcela stejně za každých okolností a pro jakékoli handlery? | ||
```js | ||
příslib.then(f1).catch(f2); | ||
``` | ||
Oproti: | ||
```js | ||
příslib.then(f1, f2); | ||
``` |
374 changes: 187 additions & 187 deletions1-js/11-async/03-promise-chaining/article.md
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12 changes: 6 additions & 6 deletions1-js/11-async/03-promise-chaining/head.html
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2 changes: 1 addition & 1 deletion1-js/11-async/03-promise-chaining/one.js
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functionjedna() { | ||
alert(1); | ||
} |
2 changes: 1 addition & 1 deletion1-js/11-async/03-promise-chaining/promise-handler-variants.svg
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