selection.append() creates an element and adds it as the last child of each element in a D3 selection. Pass the element or tag name as its argument, then continue with chained D3 methods. section 2.4
Add an SVG container
Select the chart container and append an SVG element: const svg = d3.select(".responsive-svg-container") .append("svg"); The browser may show no immediate visual change, but the SVG appears in the DOM. Saving the returned selection in svg lets subsequent calls append shapes or set attributes on the new SVG element. section 2.4 section 2.5
Use append() with these practical patterns:
- Append a rectangle to one SVG: d3.select("svg").append("rect"). section 2.4
- Combine d3.selectAll() with append() to add an element inside every matched node, such as a paragraph inside each div. section 2.4
- Indent chained methods by two spaces per nesting level so attributes and styles remain associated with the intended selection. section 2.5
d3.select(".responsive-svg-container")
.append("svg");
Shows the core selection-to-SVG append pattern used to place a visualization container in the DOM. section 2.4
