Angular 6 - ERROR TypeError: Cannot read property 'value' of undefined

Question

I\'m new to Angular and Typescript and cannot get to the bottom of this console error: \"ERROR TypeError: Cannot read property \'value\' of undefined\"

I\'m calling

Answer 1

Just use

{{ joke?.value }}

Your joke object doesn't have the value until the API response arrives. Thus use ? to apply the null check until the response arrives.