May 2019
Beginner to intermediate
650 pages
14h 50m
English
Content preview from Learn D3.js
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What is D3?
Yes, D3 is a JavaScript library, but no, D3 is not a charting library. There are no ready-to-use templates to create bar, pie, or line charts, for example. To create one of these charts, you have to draw all the lines, curves, and rectangles yourself using open standards such as SVG or HTML Canvas. D3, however, will do most of the hard work for you. It’s not trivial to use pure SVG to draw a bar chart; you need to scale data values so they fit in the chart, then calculate where to place each bar, and finally, set the coordinates of each rectangle before drawing it. Using D3, starting with an array of data, you can render all the bars with half a dozen chained commands in a single line of code.
D3 is a data visualization library. ...
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