Fixing Common Errors in React Projects (and Why They Happen)

1. Cannot read properties of undefined (reading 'map') ** Why it happens:** You’re trying to .map() over an array — but the array is either:

undefined at the time of rendering

Not properly initialized

`{socialMedia?.map((item, index) => (

{item.name}
))}

// OR

{(socialMedia || []).map((item, index) => (

{item.name}

))}

`