• https://cdn.bootcdn.net/ajax/libs/vega/3.0.0-rc4/vega-core.js
• https://cdn.bootcdn.net/ajax/libs/vega/3.0.0-rc4/vega-core.min.js
• https://cdn.bootcdn.net/ajax/libs/vega/3.0.0-rc4/vega.js
• https://cdn.bootcdn.net/ajax/libs/vega/3.0.0-rc4/vega.min.js