How to add a “click” handler inside the “for” loop?
There is such a piece where how
$(document).on('click', '#calcA', function() {
$("#calcASum").addClass("field");
($(this).is(":checked")) ? $("#calcAInfo").css("display", "") : $("#calcAInfo").css("display", "none");
});
$(document).on('click', '#calcB', function() {
$("#calcBSum").addClass("field");
($(this).is(":checked")) ? $("#calcBInfo").css("display", "") : $("#calcBInfo").css("display", "none");
});
$(document).on('click', '#calcC', function() {
$("#calcCSum").addClass("field");
($(this).is(":checked")) ? $("#calcCInfo").css("display", "") : $("#calcCInfo").css("display", "none");
});
only AB and C changes;
I wanted to write through for ()
var item = ['A', 'B', 'C'];
for(var i=0; i<item.length; i++) {
$(document).on('click', '#calc'+item[i], function() {
$("#calc"+item[i]+"Sum").addClass("field");
($(this).is(":checked")) ? $("#calc"+item[i]+"Info").css("display", "") : $("#calc"+item[i]+"Info").css("display", "none");
});
}
he adds one more function after the click function. It turns out inside the function already i = 3. There are other solutions to this problem? thanx
jquery loops for-loop
add a comment |
There is such a piece where how
$(document).on('click', '#calcA', function() {
$("#calcASum").addClass("field");
($(this).is(":checked")) ? $("#calcAInfo").css("display", "") : $("#calcAInfo").css("display", "none");
});
$(document).on('click', '#calcB', function() {
$("#calcBSum").addClass("field");
($(this).is(":checked")) ? $("#calcBInfo").css("display", "") : $("#calcBInfo").css("display", "none");
});
$(document).on('click', '#calcC', function() {
$("#calcCSum").addClass("field");
($(this).is(":checked")) ? $("#calcCInfo").css("display", "") : $("#calcCInfo").css("display", "none");
});
only AB and C changes;
I wanted to write through for ()
var item = ['A', 'B', 'C'];
for(var i=0; i<item.length; i++) {
$(document).on('click', '#calc'+item[i], function() {
$("#calc"+item[i]+"Sum").addClass("field");
($(this).is(":checked")) ? $("#calc"+item[i]+"Info").css("display", "") : $("#calc"+item[i]+"Info").css("display", "none");
});
}
he adds one more function after the click function. It turns out inside the function already i = 3. There are other solutions to this problem? thanx
jquery loops for-loop
api.jquery.com/toggle
– freedomn-m
Nov 15 '18 at 8:51
The easiest solution is to not use IDs with semantic meaning. Use DOM traversal to find the related Sum/Info fields or pair them withdata-
attributes.
– freedomn-m
Nov 15 '18 at 8:56
add a comment |
There is such a piece where how
$(document).on('click', '#calcA', function() {
$("#calcASum").addClass("field");
($(this).is(":checked")) ? $("#calcAInfo").css("display", "") : $("#calcAInfo").css("display", "none");
});
$(document).on('click', '#calcB', function() {
$("#calcBSum").addClass("field");
($(this).is(":checked")) ? $("#calcBInfo").css("display", "") : $("#calcBInfo").css("display", "none");
});
$(document).on('click', '#calcC', function() {
$("#calcCSum").addClass("field");
($(this).is(":checked")) ? $("#calcCInfo").css("display", "") : $("#calcCInfo").css("display", "none");
});
only AB and C changes;
I wanted to write through for ()
var item = ['A', 'B', 'C'];
for(var i=0; i<item.length; i++) {
$(document).on('click', '#calc'+item[i], function() {
$("#calc"+item[i]+"Sum").addClass("field");
($(this).is(":checked")) ? $("#calc"+item[i]+"Info").css("display", "") : $("#calc"+item[i]+"Info").css("display", "none");
});
}
he adds one more function after the click function. It turns out inside the function already i = 3. There are other solutions to this problem? thanx
jquery loops for-loop
There is such a piece where how
$(document).on('click', '#calcA', function() {
$("#calcASum").addClass("field");
($(this).is(":checked")) ? $("#calcAInfo").css("display", "") : $("#calcAInfo").css("display", "none");
});
$(document).on('click', '#calcB', function() {
$("#calcBSum").addClass("field");
($(this).is(":checked")) ? $("#calcBInfo").css("display", "") : $("#calcBInfo").css("display", "none");
});
$(document).on('click', '#calcC', function() {
$("#calcCSum").addClass("field");
($(this).is(":checked")) ? $("#calcCInfo").css("display", "") : $("#calcCInfo").css("display", "none");
});
only AB and C changes;
I wanted to write through for ()
var item = ['A', 'B', 'C'];
for(var i=0; i<item.length; i++) {
$(document).on('click', '#calc'+item[i], function() {
$("#calc"+item[i]+"Sum").addClass("field");
($(this).is(":checked")) ? $("#calc"+item[i]+"Info").css("display", "") : $("#calc"+item[i]+"Info").css("display", "none");
});
}
he adds one more function after the click function. It turns out inside the function already i = 3. There are other solutions to this problem? thanx
jquery loops for-loop
jquery loops for-loop
asked Nov 15 '18 at 8:34
Гани ШахмуратГани Шахмурат
74
74
api.jquery.com/toggle
– freedomn-m
Nov 15 '18 at 8:51
The easiest solution is to not use IDs with semantic meaning. Use DOM traversal to find the related Sum/Info fields or pair them withdata-
attributes.
– freedomn-m
Nov 15 '18 at 8:56
add a comment |
api.jquery.com/toggle
– freedomn-m
Nov 15 '18 at 8:51
The easiest solution is to not use IDs with semantic meaning. Use DOM traversal to find the related Sum/Info fields or pair them withdata-
attributes.
– freedomn-m
Nov 15 '18 at 8:56
api.jquery.com/toggle
– freedomn-m
Nov 15 '18 at 8:51
api.jquery.com/toggle
– freedomn-m
Nov 15 '18 at 8:51
The easiest solution is to not use IDs with semantic meaning. Use DOM traversal to find the related Sum/Info fields or pair them with
data-
attributes.– freedomn-m
Nov 15 '18 at 8:56
The easiest solution is to not use IDs with semantic meaning. Use DOM traversal to find the related Sum/Info fields or pair them with
data-
attributes.– freedomn-m
Nov 15 '18 at 8:56
add a comment |
1 Answer
1
active
oldest
votes
The fact is that you are referencing an outer scoped variable.
You can have a look at this question: Functions declared within loops referencing an outer scoped variable may lead to confusing semantics. What is wrong?
And in your case you can try this code :
var item = ['A', 'B', 'C'];
for(var i=0; i<item.length; i++) {
const j = i;
$(document).on('click', '#calc'+item[j], function() {
$("#calc"+item[j]+"Sum").addClass("field");
($(this).is(":checked")) ? $("#calc"+item[j]+"Info").css("display", "") : $("#calc"+item[j]+"Info").css("display", "none");
});
}
It's not so much that it's an "outer scoped variable" - it's that the click event occurs after the for loop has completed, so the value ofi
has already changed by the time you click. Have a good read of this: stackoverflow.com/questions/111102/…
– freedomn-m
Nov 15 '18 at 8:54
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The fact is that you are referencing an outer scoped variable.
You can have a look at this question: Functions declared within loops referencing an outer scoped variable may lead to confusing semantics. What is wrong?
And in your case you can try this code :
var item = ['A', 'B', 'C'];
for(var i=0; i<item.length; i++) {
const j = i;
$(document).on('click', '#calc'+item[j], function() {
$("#calc"+item[j]+"Sum").addClass("field");
($(this).is(":checked")) ? $("#calc"+item[j]+"Info").css("display", "") : $("#calc"+item[j]+"Info").css("display", "none");
});
}
It's not so much that it's an "outer scoped variable" - it's that the click event occurs after the for loop has completed, so the value ofi
has already changed by the time you click. Have a good read of this: stackoverflow.com/questions/111102/…
– freedomn-m
Nov 15 '18 at 8:54
add a comment |
The fact is that you are referencing an outer scoped variable.
You can have a look at this question: Functions declared within loops referencing an outer scoped variable may lead to confusing semantics. What is wrong?
And in your case you can try this code :
var item = ['A', 'B', 'C'];
for(var i=0; i<item.length; i++) {
const j = i;
$(document).on('click', '#calc'+item[j], function() {
$("#calc"+item[j]+"Sum").addClass("field");
($(this).is(":checked")) ? $("#calc"+item[j]+"Info").css("display", "") : $("#calc"+item[j]+"Info").css("display", "none");
});
}
It's not so much that it's an "outer scoped variable" - it's that the click event occurs after the for loop has completed, so the value ofi
has already changed by the time you click. Have a good read of this: stackoverflow.com/questions/111102/…
– freedomn-m
Nov 15 '18 at 8:54
add a comment |
The fact is that you are referencing an outer scoped variable.
You can have a look at this question: Functions declared within loops referencing an outer scoped variable may lead to confusing semantics. What is wrong?
And in your case you can try this code :
var item = ['A', 'B', 'C'];
for(var i=0; i<item.length; i++) {
const j = i;
$(document).on('click', '#calc'+item[j], function() {
$("#calc"+item[j]+"Sum").addClass("field");
($(this).is(":checked")) ? $("#calc"+item[j]+"Info").css("display", "") : $("#calc"+item[j]+"Info").css("display", "none");
});
}
The fact is that you are referencing an outer scoped variable.
You can have a look at this question: Functions declared within loops referencing an outer scoped variable may lead to confusing semantics. What is wrong?
And in your case you can try this code :
var item = ['A', 'B', 'C'];
for(var i=0; i<item.length; i++) {
const j = i;
$(document).on('click', '#calc'+item[j], function() {
$("#calc"+item[j]+"Sum").addClass("field");
($(this).is(":checked")) ? $("#calc"+item[j]+"Info").css("display", "") : $("#calc"+item[j]+"Info").css("display", "none");
});
}
answered Nov 15 '18 at 8:48
BertrandBertrand
261
261
It's not so much that it's an "outer scoped variable" - it's that the click event occurs after the for loop has completed, so the value ofi
has already changed by the time you click. Have a good read of this: stackoverflow.com/questions/111102/…
– freedomn-m
Nov 15 '18 at 8:54
add a comment |
It's not so much that it's an "outer scoped variable" - it's that the click event occurs after the for loop has completed, so the value ofi
has already changed by the time you click. Have a good read of this: stackoverflow.com/questions/111102/…
– freedomn-m
Nov 15 '18 at 8:54
It's not so much that it's an "outer scoped variable" - it's that the click event occurs after the for loop has completed, so the value of
i
has already changed by the time you click. Have a good read of this: stackoverflow.com/questions/111102/…– freedomn-m
Nov 15 '18 at 8:54
It's not so much that it's an "outer scoped variable" - it's that the click event occurs after the for loop has completed, so the value of
i
has already changed by the time you click. Have a good read of this: stackoverflow.com/questions/111102/…– freedomn-m
Nov 15 '18 at 8:54
add a comment |
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api.jquery.com/toggle
– freedomn-m
Nov 15 '18 at 8:51
The easiest solution is to not use IDs with semantic meaning. Use DOM traversal to find the related Sum/Info fields or pair them with
data-
attributes.– freedomn-m
Nov 15 '18 at 8:56