diff --git a/plugin/notes/notes.html b/plugin/notes/notes.html index 2a3b2ba2..9e9dfb5b 100644 --- a/plugin/notes/notes.html +++ b/plugin/notes/notes.html @@ -244,6 +244,9 @@ } + // Limit to max one state update per X ms + handleStateMessage = debounce( handleStateMessage, 200 ); + /** * Creates the preview iframes. */ @@ -340,6 +343,37 @@ } + /** + * Limits the frequency at which a function can be called. + */ + function debounce( fn, ms ) { + + var lastTime = 0, + timeout; + + return function() { + + var args = arguments; + var context = this; + + clearTimeout( timeout ); + + var timeSinceLastCall = Date.now() - lastTime; + if( timeSinceLastCall > ms ) { + fn.apply( context, args ); + lastTime = Date.now(); + } + else { + timeout = setTimeout( function() { + fn.apply( context, args ); + lastTime = Date.now(); + }, ms - timeSinceLastCall ); + } + + } + + } + })();