JQuery or JavaScript How determine if shift key being pressed while clicking anchor tag hyperlink

Question

I have an anchor tag that calls a JavaScript function   With or without JQuery how do I determine if the shift key is down while the link is clicked   The following code does NOT work because keypress is only fired if a  real key   not the shift key  is pressed    I was hoping it would fire if just the shift key alone was pressed    var shifted   false     function                                      document  keypress function e            shifted   e shiftKey          alert  shiftkey   e shiftkey                  document  keyup function e            shifted   false                  function myfunction         shift is always false b c keypress not fired above

User · Answer

I had a similar problem  trying to capture a  shift click  but since I was using a third party control with a callback rather than the standard click handler  I didn t have access to the event object and its associated e shiftKey   I ended up handling the mouse down event to record the shift-ness and then using it later in my callback       var shiftHeld   false          control   on  mousedown   function  e    shiftHeld   e shiftKey       Posted just in case someone else ends up here searching for a solution to this problem

User · Answer

document  on  keyup keydown   function e  shifted   e shiftKey

User · Answer

A more modular approach plus the ability to keep your this scope in the listeners   var checkShift   function fn  self      return function event        if  event shiftKey          fn call self  event             return true             document  on  keydown   checkShift this enterMode  this

User · Answer

The keypress event isn t triggered by all browsers when you click shift or ctrl  but fortunately the keydown event is   If you switch out the keypress with keydown you might have better luck

User · Answer

The excellent JavaScript library KeyboardJS handles all types of key presses including the SHIFT key  It even allows specifying key combinations such as first pressing CTRL x and then a   KeyboardJS on  shift   function        handleDown       function        handleUp          If you want a simple version  head to the answer by  tonycoupland    var shiftHeld   false      control   on  mousedown   function  e    shiftHeld   e shiftKey

User · Answer

This works great for me   function listenForShiftKey e       var evt   e    window event      if  evt shiftKey          shiftKeyDown   true        else         shiftKeyDown   false

User · Answer

If anyone s looking to detect a given key and needs to know the status of the  modifiers   as they are called in Java   i e  Shift  Alt and Control keys  you can do something like this  which responds to keydown on key F9  but only if none of the Shift  Alt or Control keys is currently pressed   jqMyDiv on   keydown   function  e        if    e shiftKey  amp  amp    e altKey  amp  amp    e ctrlKey            console log  e            if  e originalEvent code      F9                  do something

User · Answer

I have used a method to test if any specific key is pressed by storing the currently pressed key codes in an array   var keysPressed           shiftCode   16     document  on  keyup keydown   function e        switch e type            case  keydown                keysPressed push e keyCode               break          case  keyup                var idx   keysPressed indexOf e keyCode               if  idx  gt   0                  keysPressed splice idx  1               break                a shifty   on  click   function e        e preventDefault        console log  Shift Pressed       isKeyPressed shiftCode     true     false          function isKeyPressed code        return keysPressed indexOf code   gt   0      Here is the jsfiddle

User · Answer

Here is the key code for each key stroke in JavaScript  You can use that and detect if the user has pressed the Shift key   backspace           8 tab                 9 enter               13 shift               16 ctrl                17 alt                 18 pause break         19 caps lock           20 escape              27 page up             33 page down           34 end                 35 home                36 left arrow          37 up arrow            38 right arrow         39 down arrow          40 insert              45 delete              46 0                   48 1                   49 2                   50 3                   51 4                   52 5                   53 6                   54 7                   55 8                   56 9                   57 a                   65 b                   66 c                   67 d                   68 e                   69 f                   70 g                   71 h                   72 i                   73 j                   74 k                   75 l                   76 m                   77 n                   78 o                   79 p                   80 q                   81 r                   82 s                   83 t                   84 u                   85 v                   86 w                   87 x                   88 y                   89 z                   90 left window key     91 right window key    92 select key          93 numpad 0            96 numpad 1            97 numpad 2            98 numpad 3            99 numpad 4            100 numpad 5            101 numpad 6            102 numpad 7            103 numpad 8            104 numpad 9            105 multiply            106 add                 107 subtract            109 decimal point       110 divide              111 f1                  112 f2                  113 f3                  114 f4                  115 f5                  116 f6                  117 f7                  118 f8                  119 f9                  120 f10                 121 f11                 122 f12                 123 num lock            144 scroll lock         145 semi-colon          186 equal sign          187 comma               188 dash                189 period              190 forward slash       191 grave accent        192 open bracket        219 back slash          220 close braket        221 single quote        222   Not all browsers handle the keypress event well  so use either the key up or the key down event  like this     document  keydown function  e        if  e keyCode    16            alert e which     or Shift was pressed

User · Answer

var shiftDown   false  this onkeydown   function evt       var evt2   evt    window event      var keyCode   evt2 keyCode    evt2 which             if keyCode  16 shiftDown   true    this onkeyup   function        shiftDown   false      demo

User · Answer

For mouse events  I know that in Firefox at least the  shiftKey  property on the event object will tell you if the shift key is down  It s documented at MSDN but I haven t tried it in forever so I don t recall if IE does this right   Thus you should be able to check for  shiftKey  on the event object in your  click  handler

User · Answer

For checking if the shiftkey is pressed while clicking with the mouse  there is an exact property in the click event object  shiftKey  and also for ctrl and alt and meta key   https   www w3schools com jsref event shiftkey asp  So using jQuery       anchor   on  click   function  e        if  e shiftKey               your code

[javascript] JQuery or JavaScript: How determine if shift key being pressed while clicking anchor tag hyperlink?

Examples related to javascript

Examples related to jquery