add sub nav bars

[syntapy]

Todo

• about nav button sub nav
  • fix width
  • fix wrap
  • hidden in mobile
• transition
• links
• works on mobile
  • remove side spacing
• tests
• use graphql
• fix invisible hover maintenance area to right on desktop
• have left / right subnavs
• fix transition
• subnav not triggered by connector hover
• make mobile subnavs click dropdown as it is in mdn website
• fix style arguments design pattern for these changes

[syntapy]

For future reference

Command I used to programmatically trigger hover on About menu, and thus get the SVG icons

document.querySelector('selector').dispatchEvent(new MouseEvent('mouseover', { 'bubbles': true }));

Got it from this stackoverflow answere