Shortcuts in daily use are many, such as familiar with paste, CTRL + v to copy CTRL + c, use keyboard shortcuts to improve our work efficiency, especially when we are familiar with a kind of operation, use it to operate again become very convenient, very comfortable, for heavy users using the keyboard, the keyboard will always faster than the mouse.

**1) tabindex:

**Tabs are used to easily control links and form elements in a page Its usage is simple: obj. = tabindex; The value of this tabindex, according to w3c, can start from 0 to 32767

**2) js set combination shortcut keys

**It’s essentially getting the value of the keyCode of the key that you’re going to set, and if you’re going to CTRL, Alt, shift, you’re going to add a ctrlkey, altKey, shiftKey, so the key is the value of the keyCode

**(1) set CTRL +enter to submit **If (e.c.trlkey && e.k.eycode == 13){ Return the submit (); }

**(2) set up   Alt+ direction key please **If (e.altKey&& e.keyCode == 37){ Return the submit (); }

**(3) set up   Shift + F10 **If (e.hiftkey && e.eycode == 37){ Return the submit (); }

**4) set the en **Ter to submit If (e.k eyCode = = 13) { Return the submit (); }

Here are some common shortcuts: Keycode      8 = BackSpace BackSpace Keycode      9 = Tab Tab Keycode    12 = Clear Keycode    13 = Enter Keycode    16 = Shift_L Keycode    17 = Control_L Keycode    18 = Alt_L Keycode    19 = Pause Keycode    20 = Caps_Lock Keycode    27 = Escape the Escape Keycode    32 = space space Keycode    33 = the Prior Keycode    34 = Next Keycode    35 = End Keycode    36 = Home Keycode    37 = Left Keycode    38 = Up Keycode    39 = Right Keycode    40 = Down Keycode    41 = Select Keycode    42 = Print Keycode    43 = the Execute Keycode    45 = Insert Keycode    46 = Delete Keycode    47 = Help Note: browser compatibility issues