Source: https://d3js.org/d3-selection

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d3-selection ​

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Selections allow powerful data-driven transformation of the document object model (DOM): set attributes , styles , properties , HTML or text content, and more. Using the data join ’s enter and exit selections, you can also add or remove elements to correspond to data.

See one of:

• Selecting elements
  • querying for DOM elements.
• Modifying elements
  • modifying attributes of selected elements.
• Joining data
  • joining data to selected elements for visualization.
• Handling events
  • declaring event listeners for interaction.
• Control flow
  • iterating over selected elements.
• Local variables
  • attaching state to elements.
• Namespaces
  • dealing with XML namespaces.

For more, see the d3-selection collection on Observable .