javascript - firebase - filter on not equal to -


i have firebase database retrieve items except items having specific value. function notequalto(), say. 

firebase.database()   .ref().child('/snippets/')   .orderbychild('description')   .notequalto('dontdisplay')   .on('value',function(snap) {     // working right snapshot   }

this not work since notequalto not function. tried passing function equalto doesn't work either:

firebase.database()   .ref().child('/snippets/')   .orderbychild('description')   .equalto(function (descr) { descr !== 'dontdisplay'; })   .on('value',function(snap) {     // working right snapshot   }

what's right way filter on items not having description 'dontdisplay'?


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