如何防止输入中的波浪号 [英] How can I prevent tilde in input

问题描述

我想阻止在我的输入中键入代字号〜的可能性。

这是我的代码片段：

< script src =https://ajax.googleapis.com/ajax/libs/jquery/2.1.1>

我用 keydown ， keypressed ， keyup ，但它不能按预期工作。

任何人都可以得到一个简单的解决方案吗？

解决方案

有些人说你的代码有效，有些人不要。

因为，〜没有绑定在每个键盘布局的相同键上。

为了能够阻止为每个人编写（或粘贴）〜的可能性，我会做这样的事情：

 <（code> $（'＃myInput'）。on（keyup，function（e）{this.value = this.value.replace（/〜/ g，''）;}） 

< script src =https://ajax.googleapis.com/ ajax / libs / jquery / 2.1.1 / jquery.min.js>< / script>< input id =myInput/>

我们可以看到每次我们尝试插入〜字符都被删除，但我认为这不是问题。相反，我认为这将帮助用户理解他不能使用该字符，而不怀疑其键盘的良好功能。

可以使用 input 而不是 keyup 来避免这种行为，但我个人更喜欢这种方式，因为上述原因。

<

通过修改正则表达式，可以添加一些其他被禁止的字符：

  $（'＃myInput' [〜^！] / g，''）;}） 

< script src =https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js>< / script>< input id =myInput/ >< p> Forbidden：〜^！< / p>

我希望它有帮助。

I would like to block the possibility to type a tilde ~ in my input.
Here is a snippet of my code:

$('#myInput').on("keydown", function(e) {
  if (e.shiftKey && e.keyCode === 192) {
    e.preventDefault();
    console.log(e.keyCode);
  }
})

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<input id="myInput" />

I tried the same as above with keydown, keypressed, keyup, but it is not working as intended.
Do anyone got a simple solution?

解决方案

Some people say your code works, some people don't.

Because, "~" isn't binded on the same keys on each keyboard layout.
To be able to block the possibility of writing (or pasting) "~" for everyone, I'll do something like this:

$('#myInput').on("keyup", function(e) {
  this.value = this.value.replace(/~/g, '');
})

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input id="myInput" />

We can see the "~" character been deleted each time we try to insert one, but I don't think that's an issue. Instead, I think that will help the user understand he can't use that character, without doubting about the good-functioning of their keyboard.
It's possible to use input instead of keyup to avoid that behaviour, but I personally prefer it that way for the above reasons.

⋅ ⋅ ⋅

This would be possible to add some other forbidden characters by modifying the regex:

$('#myInput').on("keyup", function(e) {
  this.value = this.value.replace(/[~^!]/g, '');
})

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input id="myInput" />
<p>Forbidden: ~ ^ !</p>

I hope it helps.

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