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JavaScript Interactive Web Pages with JavaScript Traversing and Manipulating the DOM with JavaScript Perform: Changing Classes

Posted by cassac
cassac
9,628 Points

What's the point of the "else" clause in the "editTask" function?

If I remove the "else" clause it seems the apps functions with no problems. Why is it included?

var editTask = function() {
  console.log("Edit task...");
  var listItem = this.parentNode;

  var editInput = listItem.querySelector("input[type=text]");
  var label = listItem.querySelector("label");

  var containsClass = listItem.classList.contains("editMode");
  //if the class of the parent is .editMode
  if (containsClass) {
    //Switch from .editMode
    //label text become the input's value
    label.innerText = editInput.value;
  } else {
    //Switch to .editMode
    //input value becomes the label's text
    editInput.value = label.innerText;
  }
  //Toggle .editMode on the listItem
  listItem.classList.toggle("editMode");

}

2 Answers

cassac
cassac
9,628 Points
cassac
cassac
9,628 Points

I was having a hard time seeing how these things correlate with each other.

I replaced 

editInput.value = label.innerText;

with

 editInput.value = "What's the point of this?";

And can see the correlation. Thanks for the input!

Devin Scheu
Devin Scheu
66,191 Points
Devin Scheu
Devin Scheu
66,191 Points

The else clause does what it says, if the if statement is not true then the code in the else clause will execute, sometimes its need and sometimes its just there in case there is an error. This is checking if whatever the parent element is, is in edit mode.