MDN已经提供了一个解决方案:

https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode

window.addEventListener("keydown", function (event) {
  if (event.defaultPrevented) {
    return; // Should do nothing if the default action has been cancelled
  }

  var handled = false;
  if (event.key !== undefined) {
    // Handle the event with KeyboardEvent.key and set handled true.
  } else if (event.keyIdentifier !== undefined) {
    // Handle the event with KeyboardEvent.keyIdentifier and set handled true.
  } else if (event.keyCode !== undefined) {
    // Handle the event with KeyboardEvent.keyCode and set handled true.
  }

  if (handled) {
    // Suppress "double action" if event handled
    event.preventDefault();
  }
}, true);

你有三种方法来处理它，因为它写在你分享的链接上。

if (event.key !== undefined) {

} else if (event.keyIdentifier !== undefined) {

} else if (event.keyCode !== undefined) {

}

你应该考虑它们，如果你想要跨浏览器支持，这是正确的方法。

如果你实现这样的东西，它会更容易。

var dispatchForCode = function(event, callback) {
  var code;

  if (event.key !== undefined) {
    code = event.key;
  } else if (event.keyIdentifier !== undefined) {
    code = event.keyIdentifier;
  } else if (event.keyCode !== undefined) {
    code = event.keyCode;
  }

  callback(code);
};

e.charCode已弃用:

<input
  onChange={(e) => setToken(e.target.value)}
  type="text"
  value={token}
  onKeyPress={(e) => {
    if (e.charCode === 13) {
      verifyLoginF()
    }
  }}
/>

你应该用现在:e。键=== 'Enter'

这里建议使用key value而不是keyCode，如果失败，则使用keyCode。但是这还不够，因为这个属性中的值是不兼容的。事情是new key包含控制键的字符串，比如:ArrowUp，但keyCode只包含简单的代码

String.fromCharCode(event.keyCode)

将导致不可打印的字符。下面是可打印字符的解决方案:

element.keydown((event) => {
    var symbolPressed;
    //cross browser
    if (event.key !== undefined) {
        symbolPressed = event.key; //Here control characters represented as String like: ArrowUp
        if (symbolPressed.length > 1) return; //filter out control characters
    } else if (event.keyCode !== undefined) {
        symbolPressed = String.fromCharCode(event.keyCode); //Here control chars represented as one char string
    }
    //Update this regex if you need other characters
    if (!symbolPressed.match(/[A-z0-9\s]/)) return;
    console.log(symbolPressed);
});

如果需要不可打印的控制字符，则必须相应地更新条件和正则表达式。

此外，所有的keyCode, which, charCode和keyIdentifier都已弃用: charCode和keyIdentifier是非标准特性。 keyIdentifier在Chrome 54和Opera 41.0版本被移除 在FF上正常字符的按键事件上，keyCode返回0。

键属性:

 readonly attribute DOMString key

保存与所按键对应的键属性值

在撰写本文时，所有主要浏览器都支持key属性:Firefox 52、Chrome 55、Safari 10.1、Opera 46。除了Internet Explorer 11，它有: 不标准的键标识符和错误的行为与AltGraph。更多信息 如果这很重要，或者向后兼容性很重要，那么你可以像下面的代码一样使用特性检测:

Notice that the keyvalue is different from keyCode or which properties in that : it contains the name of the key not its code. If your program needs characters' codes then you can make use of charCodeAt(). For single printable characters you can use charCodeAt(), if you're dealing with keys whose values contains multiple characters like ArrowUp chances are : you are testing for special keys and take actions accordingly. So try implementing a table of keys' values and their corresponding codes charCodeArr["ArrowUp"]=38, charCodeArr["Enter"]=13,charCodeArr[Escape]=27... and so on, please take a look at Key Values and their corresponding codes

if(e.key!=undefined){
        var characterCode = charCodeArr[e.key] || e.key.charCodeAt(0);
    }else{
        /* As @Leonid suggeted   */
        var characterCode = e.which || e.charCode || e.keyCode || 0;
    }
        /* ... code making use of characterCode variable  */  

也许你想考虑向前兼容性，即使用遗留属性时，他们是可用的，只有当放弃切换到新的:

if(e.which || e.charCode || e.keyCode ){
        var characterCode = e.which || e.charCode || e.keyCode;
    }else if (e.key!=undefined){
        var characterCode = charCodeArr[e.key] || e.key.charCodeAt(0);
    }else{
        var characterCode = 0;
    }

参见:KeyboardEvent。代码属性文档和更多细节。

MDN已经提供了一个解决方案:

https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode

window.addEventListener("keydown", function (event) {
  if (event.defaultPrevented) {
    return; // Should do nothing if the default action has been cancelled
  }

  var handled = false;
  if (event.key !== undefined) {
    // Handle the event with KeyboardEvent.key and set handled true.
  } else if (event.keyIdentifier !== undefined) {
    // Handle the event with KeyboardEvent.keyIdentifier and set handled true.
  } else if (event.keyCode !== undefined) {
    // Handle the event with KeyboardEvent.keyCode and set handled true.
  }

  if (handled) {
    // Suppress "double action" if event handled
    event.preventDefault();
  }
}, true);