Feature Request: Find current breakpoint with Javascript

It would be very useful if we could find out what breakpoint is being displayed at the moment with Javascript.

For example:

if( bootstrapBreakpoint() == "xs" ) { // do something } else { // do something }

[mdo]

Closing out though—no plans to add this ourselves.

[patrickhlauke]

fwiw, this can be achieved with something like

var lg = window.getComputedStyle(document.documentElement).getPropertyValue('--breakpoint-lg');
if (window.matchMedia("(min-width: "+lg+")").matches) {
  /* do something */
} else {
  /* do something else */
}

(not exhaustively tested, so ymmv)

[edit: and for reference, it’s not possible to use var(--breakpoint-lg) directly in the query tested by matchMedia, as var() is not allowed in that context - hence the slightly awkward acrobatics]