When comparing Chart.js vs gRaphaël, the Slant community recommends Chart.js for most people. In the question“What are the best client side JavaScript charting libraries?” Chart.js is ranked 1st while gRaphaël is ranked 7th. The most important reason people chose Chart.js is:
The library contains a set of 6 charts and is 11Kb gzipped, this makes its loading time and page impact low.
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Pros
Pro Lightweight and fast
The library contains a set of 6 charts and is 11Kb gzipped, this makes its loading time and page impact low.
Pro Responsive charts
The charts are fully responsive, meaning they resize based on the viewport width.
Pro Clear documentation
The chart.js documentation is well organized and provides detailed information on using each feature.
Pro Plugin support
Many plugins available via NPM and you can easily write your own
Pro Works with older browsers
Because Raphael supports rendering VML + SVG, it is one of the few drawing libraries that is backwards compatible with older browsers that do not support canvas. gRaphaël supports IE 6+, Firefox 3.0+, Safari 3.0+, and Opera 9.5+.
Cons
Con Limited features
Chart.js currently offers only 6 graph types, and lacks the flexibility offered by other options. For example, controlling the display of tooltips is fairly limited.
Con Canvas based
Canvas it bitmap based and shares the same issues as non-vector formats.