#Using promises with keyup for forms software#

This method will append 1 at the end of each key pressed in the text field.ĭocument.getElementById('Number').addEventListener('keyup', myMethod) This example demonstrated use of addEventListener() method to attach a 'keyup' event to an input field. Using this method enhances the readability of the code.

Here we are using addEventListener() method to attach the event handler onkeyup event by calling myMethod and execute the statements in the method. In our second example we will see JavaScript code to append 1 to the each letter being pressed in the input field. Var number = document.getElementById('Number') Calling the function on the objects using onkeyup keyword.

#Using promises with keyup for forms software#

Web development, programming languages, Software testing & othersġ. Start Your Free Software Development Course Thus for calling onkeyup event method there are 2 syntax. And second is using an addEventListener method to call the function to perform the operations. In JavaScript if one needs an event in ones application there are 2 ways for that, one is by calling onkeyup method on the object and calling the method that contains the operations needed to be performed. This method works irrespective of the key being pressed, unlike the onkeyup event that occurs when letters or numbers key was pressed. In case the key is not released event will not be called. This method gets called once one key is a released from the keyword after being pressed.

Method for this event helps the application to handle the occurring event without attaching the delegates. Using this method allows one to handle the events in the derived classes. JavaScript onkeyup event is a type of event that occurs when the user handling the application releases one key on the keyboard.