Learning D3.JS 5.0 9.5: Making the Tree Collapsible

The video tutorial covers the creation and manipulation of a tree diagram using code. It begins with updates to the code structure, focusing on selecting elements and creating diagonal paths. The tutorial then delves into working with links, exploring their structure and characteristics. Methods and attributes for handling links are discussed, followed by processes for updating and exiting links. The tutorial concludes with finalizing the diagram and collapsing nodes, providing a comprehensive overview of building and managing a tree diagram.

What minor change was made to the 'select all' function in the initial setup?

• It was removed completely.

• It was renamed to 'select'.

• It was moved to a different file.

• It was duplicated.

What is the purpose of the diagonal path in the tree diagram?

• To create a straight line between nodes.

• To create a curved path from parent to child nodes.

• To highlight the root node.

• To add color to the nodes.

What is the first step in working with links in the tree diagram?

• Creating a new SVG element.

• Setting up the data with links.

• Removing all existing nodes.

• Adding color to the links.

What is the purpose of the 'link update' variable?

• To update and transition links.

• To delete all links.

• To change the color of links.

• To add new nodes.

How is the transition duration set for updating links?

• 1000 milliseconds

• 500 milliseconds

• 750 milliseconds

• 200 milliseconds

What happens when you refresh the browser after finalizing the diagram?

• The diagram resets to default.

• The nodes disappear.

• The nodes become collapsible.

• The links change color.

Why is Level 3 not collapsible in the final tree diagram?

• It is a special node.

• It is the last part of the nodes.

• It is the root node.

• It is not connected to any parent.