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Why i have make another .then to pull a promiseValue from fetch promise
Why does .json() return a promise?How do you access the matched groups in a JavaScript regular expression?Change the selected value of a drop-down list with jQueryWhat is JSONP, and why was it created?Is Safari on iOS 6 caching $.ajax results?Is it bad practice to have a constructor function return a Promise?Why does javascript ES6 Promises continue execution after a resolve?Handling errors in Promise.allWhy do we need middleware for async flow in Redux?Fetch api, why do I have to use then on the response json(), trying to make sens of promisesPassing another promise to a promise handler
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
Hello. First .then is resolved and have a value response. Why if i log res.text it is just a promise, and when i make another then with the same return , next .then with the same res.text it's a string now??
May someone explain it for me:)?
javascript promise fetch
asked Mar 27 at 23:04
Rafal9626Rafal9626
195 bronze badges
add a comment |
Hello. First .then is resolved and have a value response. Why if i log res.text it is just a promise, and when i make another then with the same return , next .then with the same res.text it's a string now??
May someone explain it for me:)?
javascript promise fetch
asked Mar 27 at 23:04
Rafal9626Rafal9626
195 bronze badges
short answer is - this is howfetchis specified and implemented - so, the reason you have to "make another .then" is because that's how you use fetch API
– Jaromanda X
Mar 27 at 23:22
Possible duplicate of Why does .json() return a promise?
– sideshowbarker
Mar 28 at 1:14
add a comment |
Hello. First .then is resolved and have a value response. Why if i log res.text it is just a promise, and when i make another then with the same return , next .then with the same res.text it's a string now??
May someone explain it for me:)?
javascript promise fetch
asked Mar 27 at 23:04
Rafal9626Rafal9626
195 bronze badges
Hello. First .then is resolved and have a value response. Why if i log res.text it is just a promise, and when i make another then with the same return , next .then with the same res.text it's a string now??
May someone explain it for me:)?
javascript promise fetch
javascript promise fetch
asked Mar 27 at 23:04
Rafal9626Rafal9626
195 bronze badges
asked Mar 27 at 23:04
Rafal9626Rafal9626
195 bronze badges
asked Mar 27 at 23:04
Rafal9626Rafal9626
195 bronze badges
asked Mar 27 at 23:04
Rafal9626Rafal9626
195 bronze badges
asked Mar 27 at 23:04
Rafal9626Rafal9626
195 bronze badges
195 bronze badges
short answer is - this is howfetchis specified and implemented - so, the reason you have to "make another .then" is because that's how you use fetch API
– Jaromanda X
Mar 27 at 23:22
Possible duplicate of Why does .json() return a promise?
– sideshowbarker
Mar 28 at 1:14
add a comment |
short answer is - this is howfetchis specified and implemented - so, the reason you have to "make another .then" is because that's how you use fetch API
– Jaromanda X
Mar 27 at 23:22
Possible duplicate of Why does .json() return a promise?
– sideshowbarker
Mar 28 at 1:14
short answer is - this is how
fetch is specified and implemented - so, the reason you have to "make another .then" is because that's how you use fetch API– Jaromanda X
Mar 27 at 23:22
short answer is - this is how
fetch is specified and implemented - so, the reason you have to "make another .then" is because that's how you use fetch API– Jaromanda X
Mar 27 at 23:22
Possible duplicate of Why does .json() return a promise?
– sideshowbarker
Mar 28 at 1:14
Possible duplicate of Why does .json() return a promise?
– sideshowbarker
Mar 28 at 1:14
add a comment |
2 Answers
2
active
oldest
votes
The fetch function returns a Promise that resolves with a Body response.
Paraphrased from Mozilla: Fetch and Mozilla: Body:
The fetch() method... returns a Promise that resolves to the Response to that request, whether it is successful or not... Once a Response is retrieved, there are a number of methods available to define what the body content is and how it should be handled.
If you then navigate to the documentation for Body you can see that it has a number of methods on it. The Body.text() method:
Takes a Response stream and reads it to completion. It returns a promise that resolves with a USVString (text). The response is always decoded using UTF-8.
The behavior you've described is how the fetch API is expected to behave.
answered Mar 27 at 23:13
DehliDehli
5,0895 gold badges23 silver badges41 bronze badges
add a comment |
The Fetch API returns a promise which resolves to a Response. The Response itself has a text() method which returns a promise as well. You can use this method to read the Response-Stream as a text. See https://developer.mozilla.org/en-US/docs/Web/API/Response
answered Mar 27 at 23:13
Stefan BlambergStefan Blamberg
6724 silver badges21 bronze badges
add a comment |
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2 Answers
2
active
oldest
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2 Answers
2
active
oldest
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active
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active
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The fetch function returns a Promise that resolves with a Body response.
Paraphrased from Mozilla: Fetch and Mozilla: Body:
The fetch() method... returns a Promise that resolves to the Response to that request, whether it is successful or not... Once a Response is retrieved, there are a number of methods available to define what the body content is and how it should be handled.
If you then navigate to the documentation for Body you can see that it has a number of methods on it. The Body.text() method:
Takes a Response stream and reads it to completion. It returns a promise that resolves with a USVString (text). The response is always decoded using UTF-8.
The behavior you've described is how the fetch API is expected to behave.
answered Mar 27 at 23:13
DehliDehli
5,0895 gold badges23 silver badges41 bronze badges
add a comment |
The fetch function returns a Promise that resolves with a Body response.
Paraphrased from Mozilla: Fetch and Mozilla: Body:
The fetch() method... returns a Promise that resolves to the Response to that request, whether it is successful or not... Once a Response is retrieved, there are a number of methods available to define what the body content is and how it should be handled.
If you then navigate to the documentation for Body you can see that it has a number of methods on it. The Body.text() method:
Takes a Response stream and reads it to completion. It returns a promise that resolves with a USVString (text). The response is always decoded using UTF-8.
The behavior you've described is how the fetch API is expected to behave.
answered Mar 27 at 23:13
DehliDehli
5,0895 gold badges23 silver badges41 bronze badges
add a comment |
The fetch function returns a Promise that resolves with a Body response.
Paraphrased from Mozilla: Fetch and Mozilla: Body:
The fetch() method... returns a Promise that resolves to the Response to that request, whether it is successful or not... Once a Response is retrieved, there are a number of methods available to define what the body content is and how it should be handled.
If you then navigate to the documentation for Body you can see that it has a number of methods on it. The Body.text() method:
Takes a Response stream and reads it to completion. It returns a promise that resolves with a USVString (text). The response is always decoded using UTF-8.
The behavior you've described is how the fetch API is expected to behave.
answered Mar 27 at 23:13
DehliDehli
5,0895 gold badges23 silver badges41 bronze badges
The fetch function returns a Promise that resolves with a Body response.
Paraphrased from Mozilla: Fetch and Mozilla: Body:
The fetch() method... returns a Promise that resolves to the Response to that request, whether it is successful or not... Once a Response is retrieved, there are a number of methods available to define what the body content is and how it should be handled.
If you then navigate to the documentation for Body you can see that it has a number of methods on it. The Body.text() method:
Takes a Response stream and reads it to completion. It returns a promise that resolves with a USVString (text). The response is always decoded using UTF-8.
The behavior you've described is how the fetch API is expected to behave.
answered Mar 27 at 23:13
DehliDehli
5,0895 gold badges23 silver badges41 bronze badges
answered Mar 27 at 23:13
DehliDehli
5,0895 gold badges23 silver badges41 bronze badges
answered Mar 27 at 23:13
DehliDehli
5,0895 gold badges23 silver badges41 bronze badges
answered Mar 27 at 23:13
DehliDehli
5,0895 gold badges23 silver badges41 bronze badges
5,0895 gold badges23 silver badges41 bronze badges
add a comment |
add a comment |
The Fetch API returns a promise which resolves to a Response. The Response itself has a text() method which returns a promise as well. You can use this method to read the Response-Stream as a text. See https://developer.mozilla.org/en-US/docs/Web/API/Response
answered Mar 27 at 23:13
Stefan BlambergStefan Blamberg
6724 silver badges21 bronze badges
add a comment |
The Fetch API returns a promise which resolves to a Response. The Response itself has a text() method which returns a promise as well. You can use this method to read the Response-Stream as a text. See https://developer.mozilla.org/en-US/docs/Web/API/Response
answered Mar 27 at 23:13
Stefan BlambergStefan Blamberg
6724 silver badges21 bronze badges
add a comment |
The Fetch API returns a promise which resolves to a Response. The Response itself has a text() method which returns a promise as well. You can use this method to read the Response-Stream as a text. See https://developer.mozilla.org/en-US/docs/Web/API/Response
answered Mar 27 at 23:13
Stefan BlambergStefan Blamberg
6724 silver badges21 bronze badges
The Fetch API returns a promise which resolves to a Response. The Response itself has a text() method which returns a promise as well. You can use this method to read the Response-Stream as a text. See https://developer.mozilla.org/en-US/docs/Web/API/Response
answered Mar 27 at 23:13
Stefan BlambergStefan Blamberg
6724 silver badges21 bronze badges
answered Mar 27 at 23:13
Stefan BlambergStefan Blamberg
6724 silver badges21 bronze badges
answered Mar 27 at 23:13
Stefan BlambergStefan Blamberg
6724 silver badges21 bronze badges
answered Mar 27 at 23:13
Stefan BlambergStefan Blamberg
6724 silver badges21 bronze badges
6724 silver badges21 bronze badges
add a comment |
add a comment |
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short answer is - this is how
fetchis specified and implemented - so, the reason you have to "make another .then" is because that's how you use fetch API– Jaromanda X
Mar 27 at 23:22
Possible duplicate of Why does .json() return a promise?
– sideshowbarker
Mar 28 at 1:14