Interpreter conversion of string to number should throw on NaN #27788
Description
Kibana version: 6.6+
Describe the bug:
When converting from a string to a number, it simply passes the string through Number. This mostly works, except when the resulting value is NaN, in which case it just returns NaN, which is a number, but isn't valid.
Steps to reproduce:
- Set an number argument to a string value, like "cats" (font size on the plot function in Canvas is one example).
- The value of
argspassed into the function is the string"NaN"
Expected behavior:
The conversion should throw if isNaN(Number(value)) is true.