Uncaught TypeError: Cannot read property 'Checked' of undefined - ReactJS

Question

I am trying to create a simple a TODO list app in ReactJS. My basics of React are not very clear so I am stuck here.

Answer 1

You need set this for .map (you can do that through second argument in .map)

return 
{this.props.items.map(createItem, this)}
;

Example

because now in createItem this refers to global (in browsers it will be window) score (or if you use strict mode this will be undefined)

as you use babel you also can use arrow functions

var createItem = (item) => {
  return 

    {item.text}
  
;
};

return 
{this.props.items.map(createItem)}
;

Example