Please review this error

[piusnig]

this.props.posts.map is not a function

at this point
const postItems = this.props.posts.map(function(post) {

[Arpan90]

@piusnig This error is coming because in postReducers.js you probably typed:
case 'NEW_POST':
return{
...state,
items: action.payload // notice items
};

instead of:

case 'NEW_POST':
return{
...state,
item: action.payload // notice item
};

So, posts variable which is defined as an array gets replaced by an object when you create a new post.