Keyboard events and form events

Keyboard events

• Key events

  keydown Press down , In response to any key press

  keypress Press down , Respond to keys and... That can input characters enter Key press

  keyup lift , Respond to any key lift

• e.keyCode e.which

  e.keyCode Get the key value of the key

  e.which Get the key value of the key , Or the key value pressed by the mouse

Form Events

• onfocus onblur

  Form elements get （ Lose ） The focus triggers , As long as non form elements can get focus , It can also trigger this event , such as a document etc. .

• onchange

  Triggered when the content changes , Generally used in input select On the label .

• onsubmit

  When you click submit After button ,form The tag will trigger this event .

• onreset

  When you click reset After button ,form The tag will trigger this event .

• onselect

  Triggered when the text in the form is selected , Not only form , Other tags can also trigger this event .

have access to .focus() .blur() .submit() .reset() Methods by js To complete various operations .

√. Case study or Homework

People move

Automatic wheel broadcasting

Seamless rotation

Rolling clock