React Js Map Is Not A Function: Web first of all, you have to validate to have data before using the map. I'm setting the values in this state inside useeffect, but for some reason after some updates it starts to give. Let newval = data.push (value) setdata (newval) console.log (typeof data).
Let newval = data.push (value) setdata (newval) console.log (typeof data). Map is not a function occurs when we call the map () method on a value that is not an array. So you can do something like:
React Js Map Is Not A Function: So you can do something like: There's a lot wrong right here: Web first of all, you have to validate to have data before using the map.
