当我尝试在我的网站上构建键盘快捷键时，为什么 jQuery keyup 不起作用？

Question

我正在尝试为我的网站构建可访问性的键盘快捷键。例如，当用户按下“1”时，我想将他移到家中。当用户按“2”时，转到不同的页面。

我正在尝试为此使用 keyup，但它不起作用。

$(function() {
  $(document).keyup(function(e) {
    if (e.which == 1) {
      console.log('1');
      window.location.href = '/';
    } else if (e.which == 2) {
      window.location.href = '/escolas';
    } else if (e.which == 3) {
      window.location.href = '/noticias';
    } else if (e.which == 4) {
      window.location.href = '/eventos';
    } else if (e.which == 5) {
      window.location.href = '/contato';
    }
  });
});

有人可以帮助我吗？当我按“1”时，它没有记录 1。

Answer 1

这是因为“1”的键码不是 1 而是 49（或者小键盘上的键码是 97）。

选中此项以查看您的密钥代码：

$(function() {
  $(document).keyup(function(e) {
    $('body').text(e.type + ' ' + e.which);
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

Answer 2

您使用了错误的键码。参考this

$(function() {
  $(document).keyup(function(e) {
    if (e.which == 49) {
      console.log('1');
      window.location.href = '/';
    } else if (e.which == 50) {
      window.location.href = '/escolas';
    } else if (e.which == 51) {
      window.location.href = '/noticias';
    } else if (e.which == 52) {
      window.location.href = '/eventos';
    } else if (e.which == 53) {
      window.location.href = '/contato';
    }
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

Answer 3

您可以通过String.fromCharCode(event.which);获取关键字符，然后直接与实际字符进行比较：

 $(function() {
      $(document).keyup(function(e) {
        if (e.key) {
           var key = e.key;
         } else { 
           var key  = String.fromCharCode(e.which || e.keyCode);
         }
        if (key == 1) {
          console.log('1');
          window.location.href = '/';
        } else if (key == 2) {
          window.location.href = '/escolas';
        } else if (key == 3) {
          window.location.href = '/noticias';
        } else if (key == 4) {
          window.location.href = '/eventos';
        } else if (key == 5) {
          window.location.href = '/contato';
        }
      });
    });

Answer 4

e.which 为您提供 ASCII 值。要将 ASCII 转换为字符，请使用 String.fromCharCode(e.which)。

$(function () {
    $(document).keyup(function (e) {            
        if (String.fromCharCode(e.which) == 1) {
            window.location.href = '/';
        } else if (String.fromCharCode(e.which) == 2) {
            window.location.href = '/escolas';
        } else if (String.fromCharCode(e.which) == 3) {
            window.location.href = '/noticias';
        } else if (String.fromCharCode(e.which) == 4) {
            window.location.href = '/eventos';
        } else if (String.fromCharCode(e.which) == 5) {
            window.location.href = '/contato';
        }
    });
});

Answer 5

如果你想花哨：

$(document).ready(function() {
    'use strict';
  
    const addresses = [
      {
        codes: [49, 97],
        path: '/'
      },
      {
        codes: [50, 98],
        path: '/escolas'
      },
      {
        codes: [51, 99],
        path: '/noticias'
      },
      {
        codes: [52, 100],
        path: '/eventos'
      },
      {
        codes: [52, 101],
        path: '/contato'
      }
    ]
    $(document).on("keyup", evt => {
      const key =  evt.which;
      addresses.map(address => {
        if(address.codes.filter(code => code === key).length)
          window.location.href = address.path;
      })
  });
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>