dispatch keydown event javascript
element.dispatchEvent(new KeyboardEvent('keydown', {'key':'Shift'} ));
element.dispatchEvent(new KeyboardEvent( 'keyup' , {'key':'Shift'} )); //To mimic keypress
//More complete example
//https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/KeyboardEvent
element.dispatchEvent(new KeyboardEvent("keydown", {
key: "e",
keyCode: 69,
code: "KeyE",
which: 69,
shiftKey: false,
ctrlKey: false,
metaKey: false
}));