How to add a “click” handler inside the “for” loop?












0















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







share|improve this question























  • 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
















0















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







share|improve this question























  • 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














0












0








0








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







share|improve this question














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






share|improve this question













share|improve this question











share|improve this question




share|improve this question










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 with data- attributes.

    – freedomn-m
    Nov 15 '18 at 8:56



















  • 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

















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












1 Answer
1






active

oldest

votes


















1














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");

    });

}





share|improve this answer
























  • 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











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1 Answer
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1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









1














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");

    });

}





share|improve this answer
























  • 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
















1














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");

    });

}





share|improve this answer
























  • 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














1












1








1







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");

    });

}





share|improve this answer













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");

    });

}






share|improve this answer












share|improve this answer



share|improve this answer










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 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

















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




















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