我想允许用户将大量电子邮件地址复制到他们的剪贴板。这个答案似乎是最可靠的方法:

How do I copy to the clipboard in JavaScript?

但是，在测试时我发现 window.prompt() 总是 将部分 one 的电子邮件替换为 .. ..

测试数据如下:

test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com; test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
test@test.com;test@test.com;

下面是带有以下测试数据的示例代码:

window.prompt ("To copy emails to clipboard, press: Ctrl+C, then Enter", 
  "test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com; test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;test@test.com;test@test.com;test@test.com;
  test@test.com;test@test.com;");

JSFiddle:http://jsfiddle.net/MkYDz/

点击上面的链接，将文本复制并粘贴到文本编辑器中，您会看到其中一封电子邮件(大约一半)变成了:

test@...om

为什么会这样？

最佳答案

提示的字符限制似乎是MVP所说的原因。 有一个更好的解决方法。 使用以电子邮件文本作为内容的 textarea 并使用 select 函数选择文本区域中的整个文本，就像您在提示中所做的那样。

例子:

$('#container').append('To copy emails to clipboard, press: Ctrl+C, then Enter <br />
<textarea id="emailsToCopy">'+emailsToCopy+'</textarea>');
$('#emailsToCopy').select().focus();

假设您使用 jquery。如果不是，您可以在 textarea DOM 元素上使用 select 函数。

var emailsTxtArea = document.getElementById(emailsToCopy);
emailsTxtArea.select();
emailsTxtArea.focus();

关于javascript - 传递给 window.prompt 的文本被替换为 "..."，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/18088662/