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bootstrap-4bootstrap-grid

BOOTSTRAP 4 => Error: Undefined operation: "null lt 9"

I got an error in bootstrap 4.0.0-beta while trying to extend bootstrap grid breakpoints.
Notice: As long as I used the bootstrap 4.0.0-alpha.6 there was no such error, and bootstrap grid breakpoints was successfully crerates.

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Here is part of the code of file below:

node_modules/bootstrap/scss/_custom.scss

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Here is same problem and SOLVE, but it doesn't helps for me: https://github.com/twbs/bootstrap/issues/20833

How do I solve this error?

Solution

  • I found the source of the problem. The fact is that in the file /node_modules/bootstrap/scss/_tables.scss the function call comes with a hard binding to the argument, which we re-recorded when the file was customized /node_modules/bootstrap/scss/_variables.scss via /node_modules/bootstrap/scss/_custom.scss. All that is required to FIX it is to do a relative binding in the argument of the function, or simply change argument "In my case from md to m"

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    I have also will say it to developers here: https://github.com/twbs/bootstrap/issues/20833