react-parallax | A React Component for parallax effect | Animation library
kandi X-RAY | react-parallax Summary
kandi X-RAY | react-parallax Summary
A React Component for parallax effect
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QUESTION
I am making a ReactJS Application which is throwing an error on the state
property num
and I am not quite sure why as it appears to be properly initialized and used. The error occurs on it's first usage on line 126 and reads: cannot read property 'num' of null
, which indicates to me that it would be an issue with the class state. Where is the mistake?
ANSWER
Answered 2018-Apr-27 at 15:34In a constructor, it's enough just to assign the state:
QUESTION
I have been trying to figure out why this code doesn't bind to the class. In all cases of state
properties not being defined that I have read, it was due to a lack of the following line:
ANSWER
Answered 2018-Apr-08 at 01:09Your error is occuring because you are calling this.state
inside a Promise callback from Axios. this
will be undefined
.
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