sathesujit

@sathesujit·5 public vizzes

Let's make a face with D3.js!

This example demonstrates fundamental DOM manipulation with D3.js by constructing a smiley face from SVG shapes, with animated eyebrows that move upward and downward. The face is drawn entirely through D3 selections and attribute assignments, using `d3.select` to target the SVG element and chain methods like `.append` and `.attr` to build the circles and lines. The eyebrows animate via a recurring `setInterval` that toggles their vertical position, showcasing how D3 can update existing elements. Rendering is purely SVG-based, with styling handled by an external stylesheet that hides overflow for a clean presentation.

Aug 7, 2020

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Responding to Resize

This example demonstrates how a visualization can adapt to browser resizing. The code uses CSS to make a chart container fill the viewport and JavaScript to extract its `clientWidth` and `clientHeight` on every resize event. It redraws an SVG element with `d3.select` and `svg.attr` to match the new dimensions, then renders two intersecting green lines to form an X. The D3 v5 code uses `.selectAll("line")`, `.data()`, `.enter()`, and `.merge()` to update the line elements, which visually confirms the chart’s size synchronization.

Aug 7, 2020

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Let's make a face with D3.js!

A smiling yellow face rendered in SVG animates its eyebrows up and down. D3.js version 5 builds the face from basic shapes: a circle for the head, two circles for the eyes, rectangles for the brows, and an arc-generated path for the mouth. The eyebrow animation uses chained `transition().duration()` calls to move the group containing the rectangles.

Aug 7, 2020

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Let's make a face with D3.js!

The animation shows a yellow smiley face with eyes, eyebrows, and a mouth, where the eyebrows repeatedly move up and down in a looping motion. Built with D3.js v5, the code uses the `select` and `append` methods to construct SVG elements, and chains `transition().duration()` calls to animate the eyebrow group’s `transform` attribute between two vertical offsets. The mouth is drawn with the `arc` generator, and all coordinates are derived from the SVG’s width and height, with the face centered via a `translate` transformation.

Aug 7, 2020

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Let's make a face with D3.js!

This example uses D3.js to construct a simple animated smiley face in SVG. The code builds the face from basic shapes—a yellow circle for the head, two eyes, eyebrows, and an arc-based mouth—and demonstrates D3's DOM manipulation and transition API. The eyebrows animate by moving up and down via chained `transition().duration(2000)` calls on the SVG group containing the rectangles, shifting the group's transform attribute. The visualization uses `d3.select` and `d3.arc` to generate the mouth path, with all elements centered in a 960-by-500 canvas.

Aug 7, 2020