simulateMouseDown.js

            document.addEventListener("keyup", function( ev ){
                let elKey = null
                let sKeyVal = ev.key.toLowerCase()
                if( sKeyVal ){
                    if( sKeyVal == "backspace" ) sKeyVal = "bs"
                    if( sKeyVal == "enter" ) sKeyVal = "cr"                    
                    elKey = WrdKey.getKeyEl( sKeyVal )
                    if( elKey ){  //  Simulate Tap
                        const evMD = new MouseEvent('mousedown', {view: window, bubbles: true, cancelable: true })
                        const evMU = new MouseEvent('mouseup',   {view: window, bubbles: true, cancelable: true })
                        elKey.dispatchEvent( evMD )
                        setTimeout(function(){ elKey.dispatchEvent( evMU ) }, 256) 
                    }
                }
            })