在选择框选项中设置宽度 [英] Set Width at Option of Select Box

问题描述

在图片中，选项的宽度大于选择框.我想将这些选项的宽度设置为与选择框相同对于那些较大的选项，请将text-overflow设置为省略号.任何帮助将不胜感激.

In the picture, the width of option is larger than the select box. I want to set width of those options as same as select box & for those larger options set text-overflow as ellipsis. Any help would be appreciated.

这是我尝试过的:

HTML

<select>
    <option>Select your University</option>
    <option>Bangladesh University of Engineering and Technology</option>
    <option>Mawlana Bhashani Science and Technology University</option>
</select>

Css

select, option {
    width: 250px;
}

option {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

小提琴: https://jsfiddle.net/3bsbcqfz/

推荐答案

我试图从CSS中找到一种解决方案.但是我做不到.没关系，我已经为它编写了一个简单的javascript代码.这可以为它做点什么.

I tried to find a solution from CSS. But I failed to do it. Doesn't matter, I have written a simple javascript code for it. This is can do it something for it.

function shortString(selector) {
  const elements = document.querySelectorAll(selector);
  const tail = '...';
  if (elements && elements.length) {
    for (const element of elements) {
      let text = element.innerText;
      if (element.hasAttribute('data-limit')) {
        if (text.length > element.dataset.limit) {
          element.innerText = `${text.substring(0, element.dataset.limit - tail.length).trim()}${tail}`;
        }
      } else {
        throw Error('Cannot find attribute \'data-limit\'');
      }
    }
  }
}

window.onload = function() {
  shortString('.short');
};

select {
  width: 250px;
}

option {
  width: 250px;
}

<select name="select" id="select">
  <option class='short' data-limit='37' value="Select your University">Select your University</option>
  <option class='short' data-limit='37' value="Bangladesh University of Engineering and Technology">Bangladesh University of Engineering and Technology</option>
  <option class='short' data-limit='37' value="Mawlana Bhashani Science and Technology University">Mawlana Bhashani Science and Technology University</option>
</select>

这篇关于在选择框选项中设置宽度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！