1. Replace <your_account> with your Github username in the link
   • DEMO LINK
2. Follow this instructions
   • Run npm run test command to test your code;
   • Run npm run test:only -- -n to run fast test ignoring linter;
   • Run npm run test:only -- -l to run fast test with additional info in console ignoring linter.

Task: Sliding tree

Create an expandable tree.

Requirements:

• Clicking on the headline should hide or show elements.
• Clicking outside the title text (in an empty place) should do nothing.

Hint: you need to wrap each header text into span tag.

Do not change HTML or CSS in this task.

Screenshot of the tree