onFulfilled not called immediately after promise promise resolved
I came across a behaviour of node.js that keep me awake at night.
I can't isolate the issue and it does not happen always.
I dont know what I can trust anymore. Please help.
This is what happen, I have :
console.log("foo");
Promise.resolve().then(()=> console.log("bar"));
When the code run I have a long delay ( several seconds ) between foo and bar be printed on the console.
If I put a phony setTimeout(()=>{},0) before the console.log("foo") it solve the issue 😲.
Any hint on what could possibly be happening ?
node.js promise event-loop
asked Nov 15 '18 at 17:01
Joseph GarroneJoseph Garrone
571513
add a comment |
I came across a behaviour of node.js that keep me awake at night.
I can't isolate the issue and it does not happen always.
I dont know what I can trust anymore. Please help.
This is what happen, I have :
console.log("foo");
Promise.resolve().then(()=> console.log("bar"));
When the code run I have a long delay ( several seconds ) between foo and bar be printed on the console.
If I put a phony setTimeout(()=>{},0) before the console.log("foo") it solve the issue 😲.
Any hint on what could possibly be happening ?
node.js promise event-loop
asked Nov 15 '18 at 17:01
Joseph GarroneJoseph Garrone
571513
add a comment |
I came across a behaviour of node.js that keep me awake at night.
I can't isolate the issue and it does not happen always.
I dont know what I can trust anymore. Please help.
This is what happen, I have :
console.log("foo");
Promise.resolve().then(()=> console.log("bar"));
When the code run I have a long delay ( several seconds ) between foo and bar be printed on the console.
If I put a phony setTimeout(()=>{},0) before the console.log("foo") it solve the issue 😲.
Any hint on what could possibly be happening ?
node.js promise event-loop
asked Nov 15 '18 at 17:01
Joseph GarroneJoseph Garrone
571513
I came across a behaviour of node.js that keep me awake at night.
I can't isolate the issue and it does not happen always.
I dont know what I can trust anymore. Please help.
This is what happen, I have :
console.log("foo");
Promise.resolve().then(()=> console.log("bar"));
When the code run I have a long delay ( several seconds ) between foo and bar be printed on the console.
If I put a phony setTimeout(()=>{},0) before the console.log("foo") it solve the issue 😲.
Any hint on what could possibly be happening ?
node.js promise event-loop
node.js promise event-loop
asked Nov 15 '18 at 17:01
Joseph GarroneJoseph Garrone
571513
asked Nov 15 '18 at 17:01
Joseph GarroneJoseph Garrone
571513
asked Nov 15 '18 at 17:01
Joseph GarroneJoseph Garrone
571513
asked Nov 15 '18 at 17:01
Joseph GarroneJoseph Garrone
571513
asked Nov 15 '18 at 17:01
Joseph GarroneJoseph Garrone
571513
571513
add a comment |
add a comment |
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