IE 11 Error: Object doesn't support property or method 'isNaN'

[wkgalla]

Bug, Feature, or Question?

Bug

Current Behavior

Object doesn't support property or method 'isNaN' error in IE 11 when input component type is number.
And field value remains same.

Desired Behavior

It should update value on typing new value

Suggested Solutions

It might be due to this change #437

• Formik Version: 0.11.11
• React Version: 15.6.2
• TypeScript Version: 2.6.2
• OS: windows 10
• Node Version: 8.4.0
• Package Manager and Version: npm 5.6

[piotrwitek]

Hi @jaredpalmer, here is the line in question: https://github.com/jaredpalmer/formik/pull/437/files#diff-34219b6b803d5570dffa8d0b3695a6b7R425

To fix this we may use a global isNaN instead of Number.isNaN (the latter is not supported by IE)

[Ciaran0]

Having the same issue as described above on ie11

[jaredpalmer]

Lets get a PR going

[Ciaran0]

For anyone that needs a solution asap, to solve this I included the Number.isNan polyfill from core-js.
I like the lodash.isnan solution from @ohbarye