For sure, data joining (and enter/exit) is arguably the learning curve wrt D3. TBH since I've started using FE frameworks which handle the DOM, d3-selection (and having to think about data binding) has almost completely fallen off my radar. Now it's mostly using functions from d3-scale, d3-geo, d3-shape, etc then mapping over that output to manually render DOM nodes.
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For sure, data joining (and enter/exit) is arguably the learning curve wrt D3. TBH since I've started using FE frameworks which handle the DOM, d3-selection (and having to think about data binding) has almost completely fallen off my radar. Now it's mostly using functions from d3-scale, d3-geo, d3-shape, etc then mapping over that output to manually render DOM nodes.