D3js.org Site Title

D3.js - Data-Driven Documents

D3js.org Meta Description

D3 is a JavaScript library for visualizing data with HTML, SVG, and CSS.

D3js.org Test Results

D3js.org Mobile Usability: 68/100

Quick overview:
Use legible font sizes
The following text on your page renders in a way that may be difficult for some of your visitors to read. Use legible font sizes to provide a better user experience.
The following text fragments have a small font size. Increase the font size to make them more legible.
Overview renders only 6 pixels tall (16 CSS pixels).
...
Configure the viewport
Your page specifies a fixed-width desktop viewport. Use a responsive viewport to allow your page to render properly on all devices.
Size tap targets appropriately
Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target <a href="https://github.com/d3/d3">full source and tests</a> and 10 others are close to other tap targets.

D3js.org Mobile Speed: 82/100

Quick overview:
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking script resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
https://d3js.org/d3.v4.min.js
Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://www.google-analytics.com/analytics.js (2 hours)
...

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