This toy is officially released on http://www.csie.ntu.edu.tw/~cjlin/libsvmtools/#svm_toy_based_on_javascript

You can compile your own svm-toy.js.

1. install necessary tools by running ./get_emscripten.sh
2. cd to svmtoy/
3. run make with correct path of CC and CXX (to you emcc and em++ generated by ./get_emscripten.sh)

This toy is powered by

1. LIBSVM http://www.csie.ntu.edu.tw/ by Chih-Chung Chang and Chih-Jen Lin
2. emscripten https://github.com/kripken/emscripten by Alon Zakai