d3-cloud

Uses HTML5 canvas and sprite masks for near-interactive speeds, as stated in the README, enabling fast layout computation even with many words.

Supports custom fonts, styles, rotations, and padding per word through accessor functions, allowing precise control over appearance based on data values.

Designed to work seamlessly with D3.js for data binding, but can also be used standalone or in Node.js with the canvas module, offering versatility in different environments.

Dispatches 'word' and 'end' events for real-time updates during layout, enabling developers to implement feedback and incremental rendering, as per the API reference.