为`& lt; select& gt; s的所选选项显示不同的文本 [英] Show a different text for the selected option for `<select>`s

问题描述

我希望< select> 中显示的文本与所选< option> 的文本不同.我的宽度有限，因此，如果我在< option> 中显示所有文本，则会截断一些文本.

I want the text that's displayed in the <select> to be different from the selected <option>'s text. I have limited width to work with, so if I display all the text in the <option>, then some text with be cut off.

例如，如果我的标记是这样:

For example, if my markup is this:

<select>
  <option>Open (some description)</option>
  <option>Closed (a bunch of text</option>
</select>

选择第一个选项时，我只想显示打开"一词以节省空间.我不能只使用Javascript替换文本，因为如果用户打开选择，那么他们会看到缩短的文本.

When the first option is selected, I want to show only the word "Open" to save space. I can't just use Javascript to replace the text because if the user opens the select, then they'll see the shortened text.

是否可以使用< select> 标签(即不使用自定义选择器)来执行此操作?

Is there a way to do this using the <select> tag (i.e. without using a custom selector)?

推荐答案

使用JS，您可以添加 focus 和 blur 事件监听器，以修改选项 s:

Using JS, you can add a focus and blur event listeners which modify the text of the options:

function focus() {
  [].forEach.call(this.options, function(o) {
    o.textContent = o.getAttribute('value') + ' (' + o.getAttribute('data-descr') + ')';
  });
}
function blur() {
  [].forEach.call(this.options, function(o) {
    console.log(o);
    o.textContent = o.getAttribute('value');
  });
}
[].forEach.call(document.querySelectorAll('.shortened-select'), function(s) {
  s.addEventListener('focus', focus);
  s.addEventListener('blur', blur);
  blur.call(s);
});

<select class="shortened-select">
  <option value="Open" data-descr="some description"></option>
  <option value="Closed" data-descr="a bunch of text"></option>
</select>

这篇关于为`& lt; select& gt; s的所选选项显示不同的文本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！