D3 4.13.0, HTML, SCSS, Babel + JSX
https://stackoverflow.com/questions/48541996/javascript-tree-traversal-function-error
jQuery 1.7.2, HTML, CSS, JavaScript
jQuery 2.2.4, HTML, CSS, JavaScript
D3 3.x, HTML, SCSS, Babel + JSX
AngularJS 1.2.1, HTML, CSS, JavaScript