String.fromCharCode在按键事件上不起作用 [英] String.fromCharCode not working on keydown event

问题描述

我想在按键事件中读取输入字符并尝试对其进行处理.当我尝试使用"String.fromCharCode(key);"将其转换为字符时它总是给我大写字母.

I am tyring to read the input characters on keydown event and try to process them. When I am triing to convert them into character using "String.fromCharCode(key);" Its always giving me the capital letters.

Upadte: 奇怪的是，如果我听"keypress"事件，代码就可以工作.这是什么原因.有人可以解释一下这个行为.

Upadte: Strangely the code works if I listen for "keypress" event. What is the reason for this. Could some one please explain this behavoir.

示例代码如下:

var inp = document.getElementById("ti");

inp.addEventListener("keydown", onKeyDown);

function onKeyDown(e) {
    if (window.event) {
        var key = window.event.keyCode;
    } else {
        var key = e.keyCode;
    }
    document.getElementById("output").innerHTML +=  String.fromCharCode(key);
}

在按键事件中读取角色的最佳做法是什么

小提琴演示

推荐答案

我编写了一个名为 keysight 的模块分别将keypress，keydown和keyup事件转换为字符和键.

I wrote a module called keysight that translates keypress, keydown, and keyup events into characters and keys respectively.

示例:

 inp.addEventListener("keydown", function(event) {
    var character = keysight(event).char
    document.getElementById("output").innerHTML +=  character
 })

这篇关于String.fromCharCode在按键事件上不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！