Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

v2 no longer accepts undefined and null values for creatable

See original GitHub issue

Uncaught TypeError: Cannot read property 'toLowerCase' of null
    at compareOption (modules.js?hash=dd58b4ecfe7b96bbf9be666342adcbc6603f96e6:58050)
    at modules.js?hash=dd58b4ecfe7b96bbf9be666342adcbc6603f96e6:58059
    at Array.some (<anonymous>)
    at isValidNewOption (modules.js?hash=dd58b4ecfe7b96bbf9be666342adcbc6603f96e6:58058)
    at Creatable.componentWillReceiveProps (modules.js?hash=dd58b4ecfe7b96bbf9be666342adcbc6603f96e6:58143)
    at modules.js?hash=dd58b4ecfe7b96bbf9be666342adcbc6603f96e6:24020
    at measureLifeCyclePerf (modules.js?hash=dd58b4ecfe7b96bbf9be666342adcbc6603f96e6:23485)
    at ReactCompositeComponentWrapper.updateComponent (modules.js?hash=dd58b4ecfe7b96bbf9be666342adcbc6603f96e6:24019)
    at ReactCompositeComponentWrapper.receiveComponent (modules.js?hash=dd58b4ecfe7b96bbf9be666342adcbc6603f96e6:23956)
    at Object.receiveComponent (modules.js?hash=dd58b4ecfe7b96bbf9be666342adcbc6603f96e6:16601)

Issue Analytics

State:
Created 5 years ago
Reactions:8
Comments:17 (2 by maintainers)

Top GitHub Comments

5reactions

abdi-mohamedcommented, Nov 1, 2018

same issue +1

4reactions

vladinator1000commented, Nov 26, 2018

I’ve made a pull request that should fix this, until it gets accepted, here’s a workaround. Your option’s value needs to be a string:

const defaultOption = {
  label: 'hello',
  value: String(yourValue),
};

Top Results From Across the Web

Is there a way to check for both `null` and `undefined`?

Using a juggling-check, you can test both null and undefined in one hit: if (x == null) {. If you use a strict-check,...

Documentation - TypeScript 2.0

Null - and undefined-aware types. TypeScript has two special types, Null and Undefined, that have the values null and undefined respectively.

How to Avoid the Infamous "Cannot read properties of ... - Bitovi

That error message is telling you the function is returning undefined implicitly, but its return type does not include undefined in it. Awesome!...

Handling null and undefined in JavaScript | by Eric Elliott

In some statically typed languages, you can say that null and undefined are illegal values, and let your programming language throw a TypeError ......

null - JavaScript - MDN Web Docs - Mozilla

The value null is written with a literal: null . null is not an identifier for a property of the global object, like...