CSS Calc with Variables and Multiplication











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I'm validating my CSS using the Nu Html Checker:



https://validator.w3.org/nu/



Consider the following CSS:



:root {

  --target-size: 48px;

}



.test1 {

  flex: 0 0 calc(var(--target-size) + 1px);

}



.test2 {

  min-height: calc(var(--target-size) - 0.5rem);

}



.test3 {

  flex: 0 0 calc(320px - 3 * var(--target-size));

}


The validator reports no error with .test1 and .test2.



However, for .test3, the validator reports this error:



Error: flex: The types are incompatible.



I know that the CSS rules stipulates that for multiplication, at least one of the arguments must be a <number>. I don't see that violated. I've tried nesting the multiplication in another calc(), but the error persists.



Any idea what's wrong with that rule and how to correct it?






css3







share|improve this question




















  • 1




    Have you tried flex: 0 0 calc(320px - (var(—target-size) * 3)))? I think it has to do with the loose ‘3’...
    – Roy
    Nov 10 at 23:48










  • You said it first, I didn't see this sorry
    – Patrick
    Nov 10 at 23:51










  • No, actually your suggestion pointed in the right direction. It is the operand order that appears to be critical. '3 * var(--target-size)' fails. 'var(--target-size) * 3' passes. Thanks!
    – claytoncarney
    Nov 10 at 23:55















up vote
0
down vote

favorite
1












I'm validating my CSS using the Nu Html Checker:



https://validator.w3.org/nu/



Consider the following CSS:



:root {

  --target-size: 48px;

}



.test1 {

  flex: 0 0 calc(var(--target-size) + 1px);

}



.test2 {

  min-height: calc(var(--target-size) - 0.5rem);

}



.test3 {

  flex: 0 0 calc(320px - 3 * var(--target-size));

}


The validator reports no error with .test1 and .test2.



However, for .test3, the validator reports this error:



Error: flex: The types are incompatible.



I know that the CSS rules stipulates that for multiplication, at least one of the arguments must be a <number>. I don't see that violated. I've tried nesting the multiplication in another calc(), but the error persists.



Any idea what's wrong with that rule and how to correct it?






css3







share|improve this question




















  • 1




    Have you tried flex: 0 0 calc(320px - (var(—target-size) * 3)))? I think it has to do with the loose ‘3’...
    – Roy
    Nov 10 at 23:48










  • You said it first, I didn't see this sorry
    – Patrick
    Nov 10 at 23:51










  • No, actually your suggestion pointed in the right direction. It is the operand order that appears to be critical. '3 * var(--target-size)' fails. 'var(--target-size) * 3' passes. Thanks!
    – claytoncarney
    Nov 10 at 23:55













up vote
0
down vote

favorite
1









up vote
0
down vote

favorite
1






1





I'm validating my CSS using the Nu Html Checker:



https://validator.w3.org/nu/



Consider the following CSS:



:root {

  --target-size: 48px;

}



.test1 {

  flex: 0 0 calc(var(--target-size) + 1px);

}



.test2 {

  min-height: calc(var(--target-size) - 0.5rem);

}



.test3 {

  flex: 0 0 calc(320px - 3 * var(--target-size));

}


The validator reports no error with .test1 and .test2.



However, for .test3, the validator reports this error:



Error: flex: The types are incompatible.



I know that the CSS rules stipulates that for multiplication, at least one of the arguments must be a <number>. I don't see that violated. I've tried nesting the multiplication in another calc(), but the error persists.



Any idea what's wrong with that rule and how to correct it?






css3







share|improve this question















I'm validating my CSS using the Nu Html Checker:



https://validator.w3.org/nu/



Consider the following CSS:



:root {

  --target-size: 48px;

}



.test1 {

  flex: 0 0 calc(var(--target-size) + 1px);

}



.test2 {

  min-height: calc(var(--target-size) - 0.5rem);

}



.test3 {

  flex: 0 0 calc(320px - 3 * var(--target-size));

}


The validator reports no error with .test1 and .test2.



However, for .test3, the validator reports this error:



Error: flex: The types are incompatible.



I know that the CSS rules stipulates that for multiplication, at least one of the arguments must be a <number>. I don't see that violated. I've tried nesting the multiplication in another calc(), but the error persists.



Any idea what's wrong with that rule and how to correct it?






css3




css3






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 10 at 23:49

























asked Nov 10 at 23:39









claytoncarney

15714




15714








  • 1




    Have you tried flex: 0 0 calc(320px - (var(—target-size) * 3)))? I think it has to do with the loose ‘3’...
    – Roy
    Nov 10 at 23:48










  • You said it first, I didn't see this sorry
    – Patrick
    Nov 10 at 23:51










  • No, actually your suggestion pointed in the right direction. It is the operand order that appears to be critical. '3 * var(--target-size)' fails. 'var(--target-size) * 3' passes. Thanks!
    – claytoncarney
    Nov 10 at 23:55














  • 1




    Have you tried flex: 0 0 calc(320px - (var(—target-size) * 3)))? I think it has to do with the loose ‘3’...
    – Roy
    Nov 10 at 23:48










  • You said it first, I didn't see this sorry
    – Patrick
    Nov 10 at 23:51










  • No, actually your suggestion pointed in the right direction. It is the operand order that appears to be critical. '3 * var(--target-size)' fails. 'var(--target-size) * 3' passes. Thanks!
    – claytoncarney
    Nov 10 at 23:55








1




1




Have you tried flex: 0 0 calc(320px - (var(—target-size) * 3)))? I think it has to do with the loose ‘3’...
– Roy
Nov 10 at 23:48




Have you tried flex: 0 0 calc(320px - (var(—target-size) * 3)))? I think it has to do with the loose ‘3’...
– Roy
Nov 10 at 23:48












You said it first, I didn't see this sorry
– Patrick
Nov 10 at 23:51




You said it first, I didn't see this sorry
– Patrick
Nov 10 at 23:51












No, actually your suggestion pointed in the right direction. It is the operand order that appears to be critical. '3 * var(--target-size)' fails. 'var(--target-size) * 3' passes. Thanks!
– claytoncarney
Nov 10 at 23:55




No, actually your suggestion pointed in the right direction. It is the operand order that appears to be critical. '3 * var(--target-size)' fails. 'var(--target-size) * 3' passes. Thanks!
– claytoncarney
Nov 10 at 23:55












1 Answer
1






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up vote
1
down vote



accepted










If you switch the order of multiplication it seems like it works:



flex: 0 0 calc(320px - var(--target-size) * 3);



Your right about the <number> argument but missed that the number has to be on the right side of the multiplication.






share|improve this answer





















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    up vote
    1
    down vote



    accepted










    If you switch the order of multiplication it seems like it works:



    flex: 0 0 calc(320px - var(--target-size) * 3);



    Your right about the <number> argument but missed that the number has to be on the right side of the multiplication.






    share|improve this answer

























      up vote
      1
      down vote



      accepted










      If you switch the order of multiplication it seems like it works:



      flex: 0 0 calc(320px - var(--target-size) * 3);



      Your right about the <number> argument but missed that the number has to be on the right side of the multiplication.






      share|improve this answer























        up vote
        1
        down vote



        accepted







        up vote
        1
        down vote



        accepted






        If you switch the order of multiplication it seems like it works:



        flex: 0 0 calc(320px - var(--target-size) * 3);



        Your right about the <number> argument but missed that the number has to be on the right side of the multiplication.






        share|improve this answer












        If you switch the order of multiplication it seems like it works:



        flex: 0 0 calc(320px - var(--target-size) * 3);



        Your right about the <number> argument but missed that the number has to be on the right side of the multiplication.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 10 at 23:49









        Patrick

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