Can I prevent keyup event after a keydown in javascript?
up vote
-4
down vote
favorite
Are keydown-keyup js events linked? Can I control an event during keydown to prevent the next keyup event of the same key?
$(document).keydown(function (e) {
if(some_condition)
e.preventDefault(); //I don't want keyup after this
}).keyup(function (e) {
if(keydown_was_prevent_default) {
alert("Exit without keyup!");
return false;
}
});
javascript jquery keyevent
asked Nov 19 at 17:19
Tobia
3,0381964135
add a comment |
up vote
-4
down vote
favorite
Are keydown-keyup js events linked? Can I control an event during keydown to prevent the next keyup event of the same key?
$(document).keydown(function (e) {
if(some_condition)
e.preventDefault(); //I don't want keyup after this
}).keyup(function (e) {
if(keydown_was_prevent_default) {
alert("Exit without keyup!");
return false;
}
});
javascript jquery keyevent
asked Nov 19 at 17:19
Tobia
3,0381964135
2
Just remove the keyup event?
– cmprogram
Nov 19 at 17:21
I edited my question to better explain, I have to control the same gesture/key, when I push down a button, in some circumstances, I want to prevent the next keyup (of the same key!). This is why I want to know if the two events keyup/down are linked.
– Tobia
Nov 20 at 6:16
add a comment |
up vote
-4
down vote
favorite
up vote
-4
down vote
favorite
Are keydown-keyup js events linked? Can I control an event during keydown to prevent the next keyup event of the same key?
$(document).keydown(function (e) {
if(some_condition)
e.preventDefault(); //I don't want keyup after this
}).keyup(function (e) {
if(keydown_was_prevent_default) {
alert("Exit without keyup!");
return false;
}
});
javascript jquery keyevent
asked Nov 19 at 17:19
Tobia
3,0381964135
Are keydown-keyup js events linked? Can I control an event during keydown to prevent the next keyup event of the same key?
$(document).keydown(function (e) {
if(some_condition)
e.preventDefault(); //I don't want keyup after this
}).keyup(function (e) {
if(keydown_was_prevent_default) {
alert("Exit without keyup!");
return false;
}
});
javascript jquery keyevent
javascript jquery keyevent
asked Nov 19 at 17:19
Tobia
3,0381964135
asked Nov 19 at 17:19
Tobia
3,0381964135
edited Nov 20 at 6:13
asked Nov 19 at 17:19
Tobia
3,0381964135
asked Nov 19 at 17:19
Tobia
3,0381964135
asked Nov 19 at 17:19
Tobia
3,0381964135
3,0381964135
2
Just remove the keyup event?
– cmprogram
Nov 19 at 17:21
I edited my question to better explain, I have to control the same gesture/key, when I push down a button, in some circumstances, I want to prevent the next keyup (of the same key!). This is why I want to know if the two events keyup/down are linked.
– Tobia
Nov 20 at 6:16
add a comment |
2
Just remove the keyup event?
– cmprogram
Nov 19 at 17:21
I edited my question to better explain, I have to control the same gesture/key, when I push down a button, in some circumstances, I want to prevent the next keyup (of the same key!). This is why I want to know if the two events keyup/down are linked.
– Tobia
Nov 20 at 6:16
2
2
Just remove the keyup event?
– cmprogram
Nov 19 at 17:21
Just remove the keyup event?
– cmprogram
Nov 19 at 17:21
I edited my question to better explain, I have to control the same gesture/key, when I push down a button, in some circumstances, I want to prevent the next keyup (of the same key!). This is why I want to know if the two events keyup/down are linked.
– Tobia
Nov 20 at 6:16
I edited my question to better explain, I have to control the same gesture/key, when I push down a button, in some circumstances, I want to prevent the next keyup (of the same key!). This is why I want to know if the two events keyup/down are linked.
– Tobia
Nov 20 at 6:16
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
They aren't connected.
You could pass state between them using a variable.
(function () { // IIFE to avoid making `block_keys` a global
let block_keys = false;
$(document).on("keydown", event => {
if (some_condition()) {
block_keys = true;
} else {
block_keys = false;
}
});
$(document).on("keyup", event => {
if (block_keys) {
event.preventDefault();
}
});
}());
If you were to do this on an element I would probably use data() to store the state so it would be associated with the element directly.
answered Nov 19 at 17:25
Quentin
636k718591027
I want to block the same keyup, not every other keyup.
– Tobia
Nov 20 at 6:17
@Tobia — And that is what this does. If you setblock_keyswhen the key goes down, it is going to be in that state for when the key is released … not when it is released, pressed down again, then released again.
– Quentin
Nov 20 at 8:17
What happens if i fired these events with this order: keydown(Akey), keydown(Bkey), keyUp(Bkey), keyUp(Akey)? If Akey has "some_condition" it locks also the B-keyup event.
– Tobia
Nov 20 at 8:41
I explain here with this fiddle why this solution doesn't work: jsfiddle.net/a0ux7dqf (the condition used is just an example)
– Tobia
Nov 20 at 8:50
Just namespace the variable: jsfiddle.net/fb3j0s46
– geoidesic
Nov 22 at 16:49
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
They aren't connected.
You could pass state between them using a variable.
(function () { // IIFE to avoid making `block_keys` a global
let block_keys = false;
$(document).on("keydown", event => {
if (some_condition()) {
block_keys = true;
} else {
block_keys = false;
}
});
$(document).on("keyup", event => {
if (block_keys) {
event.preventDefault();
}
});
}());
If you were to do this on an element I would probably use data() to store the state so it would be associated with the element directly.
answered Nov 19 at 17:25
Quentin
636k718591027
I want to block the same keyup, not every other keyup.
– Tobia
Nov 20 at 6:17
@Tobia — And that is what this does. If you setblock_keyswhen the key goes down, it is going to be in that state for when the key is released … not when it is released, pressed down again, then released again.
– Quentin
Nov 20 at 8:17
What happens if i fired these events with this order: keydown(Akey), keydown(Bkey), keyUp(Bkey), keyUp(Akey)? If Akey has "some_condition" it locks also the B-keyup event.
– Tobia
Nov 20 at 8:41
I explain here with this fiddle why this solution doesn't work: jsfiddle.net/a0ux7dqf (the condition used is just an example)
– Tobia
Nov 20 at 8:50
Just namespace the variable: jsfiddle.net/fb3j0s46
– geoidesic
Nov 22 at 16:49
add a comment |
up vote
1
down vote
They aren't connected.
You could pass state between them using a variable.
(function () { // IIFE to avoid making `block_keys` a global
let block_keys = false;
$(document).on("keydown", event => {
if (some_condition()) {
block_keys = true;
} else {
block_keys = false;
}
});
$(document).on("keyup", event => {
if (block_keys) {
event.preventDefault();
}
});
}());
If you were to do this on an element I would probably use data() to store the state so it would be associated with the element directly.
answered Nov 19 at 17:25
Quentin
636k718591027
I want to block the same keyup, not every other keyup.
– Tobia
Nov 20 at 6:17
@Tobia — And that is what this does. If you setblock_keyswhen the key goes down, it is going to be in that state for when the key is released … not when it is released, pressed down again, then released again.
– Quentin
Nov 20 at 8:17
What happens if i fired these events with this order: keydown(Akey), keydown(Bkey), keyUp(Bkey), keyUp(Akey)? If Akey has "some_condition" it locks also the B-keyup event.
– Tobia
Nov 20 at 8:41
I explain here with this fiddle why this solution doesn't work: jsfiddle.net/a0ux7dqf (the condition used is just an example)
– Tobia
Nov 20 at 8:50
Just namespace the variable: jsfiddle.net/fb3j0s46
– geoidesic
Nov 22 at 16:49
add a comment |
up vote
1
down vote
up vote
1
down vote
They aren't connected.
You could pass state between them using a variable.
(function () { // IIFE to avoid making `block_keys` a global
let block_keys = false;
$(document).on("keydown", event => {
if (some_condition()) {
block_keys = true;
} else {
block_keys = false;
}
});
$(document).on("keyup", event => {
if (block_keys) {
event.preventDefault();
}
});
}());
If you were to do this on an element I would probably use data() to store the state so it would be associated with the element directly.
answered Nov 19 at 17:25
Quentin
636k718591027
They aren't connected.
You could pass state between them using a variable.
(function () { // IIFE to avoid making `block_keys` a global
let block_keys = false;
$(document).on("keydown", event => {
if (some_condition()) {
block_keys = true;
} else {
block_keys = false;
}
});
$(document).on("keyup", event => {
if (block_keys) {
event.preventDefault();
}
});
}());
If you were to do this on an element I would probably use data() to store the state so it would be associated with the element directly.
answered Nov 19 at 17:25
Quentin
636k718591027
answered Nov 19 at 17:25
Quentin
636k718591027
answered Nov 19 at 17:25
Quentin
636k718591027
answered Nov 19 at 17:25
Quentin
636k718591027
636k718591027
I want to block the same keyup, not every other keyup.
– Tobia
Nov 20 at 6:17
@Tobia — And that is what this does. If you setblock_keyswhen the key goes down, it is going to be in that state for when the key is released … not when it is released, pressed down again, then released again.
– Quentin
Nov 20 at 8:17
What happens if i fired these events with this order: keydown(Akey), keydown(Bkey), keyUp(Bkey), keyUp(Akey)? If Akey has "some_condition" it locks also the B-keyup event.
– Tobia
Nov 20 at 8:41
I explain here with this fiddle why this solution doesn't work: jsfiddle.net/a0ux7dqf (the condition used is just an example)
– Tobia
Nov 20 at 8:50
Just namespace the variable: jsfiddle.net/fb3j0s46
– geoidesic
Nov 22 at 16:49
add a comment |
I want to block the same keyup, not every other keyup.
– Tobia
Nov 20 at 6:17
@Tobia — And that is what this does. If you setblock_keyswhen the key goes down, it is going to be in that state for when the key is released … not when it is released, pressed down again, then released again.
– Quentin
Nov 20 at 8:17
What happens if i fired these events with this order: keydown(Akey), keydown(Bkey), keyUp(Bkey), keyUp(Akey)? If Akey has "some_condition" it locks also the B-keyup event.
– Tobia
Nov 20 at 8:41
I explain here with this fiddle why this solution doesn't work: jsfiddle.net/a0ux7dqf (the condition used is just an example)
– Tobia
Nov 20 at 8:50
Just namespace the variable: jsfiddle.net/fb3j0s46
– geoidesic
Nov 22 at 16:49
I want to block the same keyup, not every other keyup.
– Tobia
Nov 20 at 6:17
I want to block the same keyup, not every other keyup.
– Tobia
Nov 20 at 6:17
@Tobia — And that is what this does. If you set
block_keys when the key goes down, it is going to be in that state for when the key is released … not when it is released, pressed down again, then released again.– Quentin
Nov 20 at 8:17
@Tobia — And that is what this does. If you set
block_keys when the key goes down, it is going to be in that state for when the key is released … not when it is released, pressed down again, then released again.– Quentin
Nov 20 at 8:17
What happens if i fired these events with this order: keydown(Akey), keydown(Bkey), keyUp(Bkey), keyUp(Akey)? If Akey has "some_condition" it locks also the B-keyup event.
– Tobia
Nov 20 at 8:41
What happens if i fired these events with this order: keydown(Akey), keydown(Bkey), keyUp(Bkey), keyUp(Akey)? If Akey has "some_condition" it locks also the B-keyup event.
– Tobia
Nov 20 at 8:41
I explain here with this fiddle why this solution doesn't work: jsfiddle.net/a0ux7dqf (the condition used is just an example)
– Tobia
Nov 20 at 8:50
I explain here with this fiddle why this solution doesn't work: jsfiddle.net/a0ux7dqf (the condition used is just an example)
– Tobia
Nov 20 at 8:50
Just namespace the variable: jsfiddle.net/fb3j0s46
– geoidesic
Nov 22 at 16:49
Just namespace the variable: jsfiddle.net/fb3j0s46
– geoidesic
Nov 22 at 16:49
add a comment |
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2
Just remove the keyup event?
– cmprogram
Nov 19 at 17:21
I edited my question to better explain, I have to control the same gesture/key, when I push down a button, in some circumstances, I want to prevent the next keyup (of the same key!). This is why I want to know if the two events keyup/down are linked.
– Tobia
Nov 20 at 6:16