loading...

re: More JavaScript Mistakes You May be Making VIEW POST

TOP OF THREAD FULL DISCUSSION
re: This wouldn't be 100 percent reliable since 0, empty string, and NaN are also falsy. So you would get the second choice returned in those cases as...
 

Yea, i guess you could just use the snippet if you wanted to check if theres really a value or not. I think it could be useful sometimes when you are getting a value from an api and you don't have access into the backend funtions, and they just throw either undefined null 0 or empty string

My view is to have undefined something only the runtime is allowed to set, while null is something I deliberately set.
This way you get a hint who messed up if the value is missing.

As long as we remember the difference, I think it's OK. Also, we have to be consistent in how we use them.

Some comments have been hidden by the post's author - find out more

code of conduct - report abuse