css - Firefox: calc() invalid property value -

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i have element line-height set calc():

line-height: calc(3rem / 2);

demo: http://codepen.io/ghodmode/pen/vlxzzd

it works fine in chrome, firefox's developer tools says it's invalid property value.

i'm sure i'm missing should obvious.

just reference:

thank you.

this known issue. firefox not support calc() values on properties accept either lengths or numbers, of line-height 1 such property. see bug 594933.

since 3rem / 2 1.5rem can hardcode amount instead workaround.


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