使用//notice, no caps on Int, otherwise you'd need Int32 as the declaration int n = GetSomeValueSoNEqualsSomething(); //String and string are both correct, but try to use the lowercase for variables, // uppercase for class methods. string numbers = "1,2,3"; //split the string into an array of strings delimiting by comma string[] nums = numbers.Split(','); //now, you can either check against the string return nums.Contains(n.ToString()); //string compare to return a bool //or check via a loop and parse the numbers foreach (var s in nums) { if(int.Parse(s) == n) return true; } //int compare to return a bool和现代JS！

Question

我正在尝试捕获应用程序中的某些keydown事件，但前提是同时没有按下“控制”键。我不想遇到屏幕阅读器键盘快捷方式的问题。 Shift，Ctrl和Alt很容易检查，因为它们出现在javascript事件中，但我还需要检查Ins和Windows个键以及任何Mac控制键。

这是我到目前为止所做的并且它按预期工作，但在Ins或Windows被按下时仍会触发我的事件。

handleKeydown: function(event) {
  var comboKeyPressed = event.ctrlKey || event.shiftKey || event.altKey;
  if(!comboKeyPressed && event.keyCode === $.ui.keyCode.HOME) {
    event.preventDefault();
    this.$('>ul>li:last').attr('tabindex', -1);
    this.$('>ul>li:first').attr('tabindex', 0).focus();
  } else if (!comboKeyPressed && event.keyCode === $.ui.keyCode.END) {
    event.preventDefault();
    this.$('>ul>li:first').attr('tabindex', -1);
    this.$('>ul>li:last').attr('tabindex', 0).focus();

  }
}

有没有办法轻松检查其他控制键，还是我需要捕获这些事件并在某些全局布尔值中保留它们，如this.isInsertPressed？

Answer 1

你可以这样做：

var keysPressed = {};
var keys = { insert: 45 };    
$(window).keydown(function(e) { keysPressed[e.which] = true; });
$(window).keyup(function(e) { keysPressed[e.which] = false; });

然后是：

if (keysPressed[keys.insert]) {
    // insert key is currently down
}

Answer 2

在Event object

中使用键码属性

if(event.keyCode === 45) // Insert Key

Answer 3

使用//notice, no caps on Int, otherwise you'd need Int32 as the declaration int n = GetSomeValueSoNEqualsSomething(); //String and string are both correct, but try to use the lowercase for variables, // uppercase for class methods. string numbers = "1,2,3"; //split the string into an array of strings delimiting by comma string[] nums = numbers.Split(','); //now, you can either check against the string return nums.Contains(n.ToString()); //string compare to return a bool //or check via a loop and parse the numbers foreach (var s in nums) { if(int.Parse(s) == n) return true; } //int compare to return a bool和现代JS！

没有数字代码了。您可以直接检查 Insert 键。

event.key

Mozilla Docs

Supported Browsers

如何判断插入键是否被按下

3 个答案: