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Merge pull request #11 from Microsoft/update-null-node-docs

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updaging step 3 docs
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Micah Godbolt
2019-02-26 09:11:50 -08:00
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step1-03/demo/README.md
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@@ -13,6 +13,7 @@ This demo starts off with a few elements already in place. Let's walk through wh
- **addTodo()** - This is the primary logic of our todo app. Here's how the lines break down. - **addTodo()** - This is the primary logic of our todo app. Here's how the lines break down.
1. `todo` is set to equal the first todo item 1. `todo` is set to equal the first todo item
2. `newTodo` is a clone of todo. Passing true means it is a deep clone, so we get the todo's children as well. Cloning does not duplicate the DOM node. We'll need to insert it in step 4 2. `newTodo` is a clone of todo. Passing true means it is a deep clone, so we get the todo's children as well. Cloning does not duplicate the DOM node. We'll need to insert it in step 4
> Note that this approach is very fragile, as it requires a todo node to always be present on the page
3. We set the innerText of the `<span class='title'>` to the value returned from getTodoText 3. We set the innerText of the `<span class='title'>` to the value returned from getTodoText
> Note that if we left off the `()` we'd actually be assigning innerText to the 'function' instead of the function return > Note that if we left off the `()` we'd actually be assigning innerText to the 'function' instead of the function return
4. Insert our new todo into the todo's parent (the `ul`), before our reference todo. [insertBefore](https://developer.mozilla.org/en-US/docs/Web/API/Node/insertBefore) 4. Insert our new todo into the todo's parent (the `ul`), before our reference todo. [insertBefore](https://developer.mozilla.org/en-US/docs/Web/API/Node/insertBefore)