Uncaught TypeError: Cannot read property 'value' of null at HTMLButtonElement.b5setclick (<anonymous>:361:13) b5setclick @ VM84:361 code example

Example: Uncaught TypeError: Cannot read property 'value' of null at HTMLButtonElement.

<input id="addTodoTextInput "type="text"> <!-- wrong : NO SPACE in ID property -->
 	  <input id="addTodoTextInput" type="text"> <!-- correct -->