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Cannot read property "length" of undefined

See original GitHub issue

If you pass a regExp as second argument in function reactStringReplace you can get error like: Cannot read property "length" of undefined. I think thiss is caused by the work of vanilla replace method.

For example, this code give us an error (it’s cyrillic): const str = ‘Справка Форма Ф9’; const re = /(справка[а-я].?(по)? форм[а-я] [ф|Ф]\d)/gi console.log(str.split(re)); // [“”, “Справка Форма Ф9”, undefined, “”]

So you cannot get length proprty of undefined. And this error will crush you page. Example_of_undefined

Issue Analytics

State:
Created 2 years ago
Comments:6 (3 by maintainers)

Top GitHub Comments

1reaction

iansinnottcommented, May 2, 2022

Agreed, I pushed a change that should fix this. Thanks for raising the issue. Will publish in next version.

0reactions

alex-clearcommented, May 2, 2022

@iansinnott Thanks for remark. You are right, there was an issue with our regex however, IMO, in order to prevent error throws, better to add the solution above(or in existed PR), or to add try catch to the code(maybe return error with ‘wrong regex provided’ or something similar)