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Tag Cloud in TipStory Explore Page

Hi there👋 This is the Tag Cloud React component☁️ that is being used in TipStory Explore Page. To learn more about how it is built, 💁‍♂️check out my learning note on TipStory.

TipStory Tag Cloud Gif

At high level, it takes an array of tags as input and attempts to place each tag into the book. Finally, it makes a tag visible every 300ms in the order of the array.

💻Local testing

To test this locally, type in the following in the command line

git clone https://github.com/xitanggg/tag-cloud-in-tipstory-explore-page.git
cd .\tag-cloud-in-tipstory-explore-page
npm install
npm start

And you should see what is appeared in this demo🚀

🔍The core of creating the TipStory tag cloud is the algorithm that is used to place tags and it works in the following steps:

  1. A tag is initialized with a (x1, y1) location at the center of the book
  • (x1, y1) represents the location of the top left corner of a tag
  • Center of the book means y1 = bookHeight / 2, x1 = bookWidth / 2 + xRandomness (xRandomness is a +-50px random distribution. It is used to add randomness to the tag’s Archimedean spiral path)
  1. At its current (x1, y1) location, check if the tag is within the book and doesn’t collide with other tags.
  • If a tag fails to meet any of the two conditions, the tag is moved one step along its Archimedean spiral path to obtain a new (x1, y1) position. The tag continues to move along the path if it still fails any of the two conditions.
  • If a tag meets both conditions, it is successfully placed there.

🙌This implementation is largely inspired by learnings generously shared by Jonathan Feinberg and Jason Davies. Thanks friends!