React-Select、多选和文本溢出

Question

我正在使用带有多选功能的 React-Select 组件。我面临的一个问题是，如果用户选择 3 或 4 个选项，UI 看起来很糟糕，因为文本开始溢出，这会导致组件水平和垂直增长。

我希望组件的大小保持不变，如果用户选择更多选项，那么它只会显示“...”（省略号），而不是尝试显示新选择的选项。

我想要的行为更符合这个组件

http://instructure-react.github.io/react-select-box/

看看它如何处理多选。

我现在不想更换组件，因为我们已经使用 React-Select 进行了大量测试。

你能给我一些指导方针，告诉我如何在不删除 react-select 的情况下实现这一点。

Answer 1

我已经成功实现了省略号效果并将显示保留在一行， 这是一个工作示例 https://codesandbox.io/s/v638kx67w7 希望这会有所帮助

Answer 2

我解决了这个问题而没有像这样丢失Input 组件；

import Select, { components as RSComponents } from "react-select";
   

const ValueContainer = ({ selectProps, children, ...props }) => {
    let [values, input] = children;

    if (Array.isArray(values)) {
      values = selectProps.value.map((x) => x.label).join(', ');
    }

    return (
      <RSComponents.ValueContainer {...props}>
        <div style={{
          maxWidth: "80%",
          whiteSpace: "nowrap",
          textOverflow: "ellipsis",
          overflow: "hidden",
        }}>
          {values}
         </div>
        {input}
      </RSComponents.ValueContainer>
    );
};

const customStyles = useMemo(() => ({
    valueContainer: (provided, state) => ({
        ...provided,
        whiteSpace: "nowrap",
        overflow: "hidden",
        flexWrap: 'nowrap',
    }),
    input: (provided, state) => ({
        ...provided,
        minWidth: '20%'
    }),
}), []);

<Select
    components={{ ValueContainer }}
    isMulti
    styles={customStyles}
    ...
/>

Answer 3

这是为给定的 react-select 元素生成的 Html

. react-select-box-container {
  position: relative;
  width: 240px;
  display: inline-block;
  background-color: #fff;
  border-radius: 4px;
  text-align: left;
  box-shadow: 0 0 2px rgba(0, 0, 0, .3);
}

.react-select-box {
  padding: 15px 0;
  display: inline-block;
  cursor: pointer;
  border: none;
  width: 100%;
  text-align: left;
  background-color: transparent;
}

.react-select-box:focus {
  outline: 0;
  box-shadow: 0 0 4px #0493D1;
}

.react-select-box:before {
  content: ' ';
  z-index: 1;
  position: absolute;
  height: 20px;
  top: 15px;
  right: 34px;
  border-left: 1px solid #CBD2D7;
}

.react-select-box:after {
  content: ' ';
  position: absolute;
  z-index: 1;
  top: 23px;
  right: 13px;
  border-top: 6px solid #7B8E9B;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
}

.react-select-box-label,
.react-select-box-option {
  line-height: 16px;
  font-size: 12px;
  font-weight: bold;
  color: #7B8E9B;
}

.react-select-box-label {
  padding: 0 40px 0 20px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #0493D1;
}

.react-select-box-empty .react-select-box-label {
  color: #7B8E9B;
}

.react-select-box-click-outside-layer {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
}

.react-select-box-clear {
  position: absolute;
  top: 15px;
  right: 0;
  width: 35px;
  height: 20px;
  background-color: #fff;
  text-indent: -9999em;
  z-index: 3;
  border: none;
}

.react-select-box-clear:before {
  content: '×';
  position: absolute;
  top: 2px;
  left: 10px;
  z-index: 1;
  background-color: #7B8E9B;
  border-radius: 100%;
  font-size: 13px;
  color: #fff;
  line-height: 1;
  width: 15px;
  height: 15px;
  text-indent: 0;
  text-align: center;
}

.react-select-box-clear:hover,
.react-select-box-clear:focus {
  outline: 0;
}

.react-select-box-clear:hover:before,
.react-select-box-clear:focus:before {
  background-color: #0493D1;
}

.react-select-box-hidden {
  display: none
}

.react-select-box-options {
  margin: 2px 0 0;
  position: absolute;
  padding: 10px 0;
  width: 240px;
  top: 100%;
  left: 0;
  z-index: 4;
  background-color: #fff;
  border-radius: 4px;
  box-shadow: 0 0 2px rgba(0, 0, 0, .3);
}

.react-select-box-options-list {
  list-style: none outside;
  margin: 0;
  padding: 0;
}

.react-select-box-option {
  padding: 10px 20px;
  margin: 0;
  cursor: pointer;
  display: block;
  line-height: 1.2;
  text-decoration: none;
}

.react-select-box-option:hover {
  color: #0493D1;
  background-color: #f4f4f4;
}

.react-select-box-option-selected {
  color: #CBD2D7;
}

.react-select-box-multi .react-select-box-option {
  padding-left: 42px;
  position: relative;
}

.react-select-box-multi .react-select-box-option:before {
  content: ' ';
  position: absolute;
  line-height: 1;
  text-align: center;
  left: 20px;
  top: 9px;
  border-radius: 3px;
  height: 12px;
  width: 12px;
  margin-right: 10px;
  border: 1px solid #7B8E9B;
  background: #f9f9f9;
  vertical-align: middle;
}

.react-select-box-multi .react-select-box-option-selected:before {
  content: '✓';
}

.react-select-box-multi .react-select-box-option-selected {
  color: #1F3344;
}

.react-select-box-option:focus,
.react-select-box-option-focused {
  color: #0493D1;
  outline: 0;
  background-color: #DDE2E5;
}

.react-select-box-close {
  color: #0493D1;
  text-transform: uppercase;
  background-color: transparent;
  border: none;
  padding: 5px 0;
  display: block;
  text-align: center;
  width: 100%;
  font-weight: bold;
  cursor: pointer;
  outline: none;
}

.react-select-box-close:hover,
.react-select-box-close:focus {
  text-decoration: underline;
}

.react-select-box-empty .react-select-box-close {
  color: #CBD2D7;
}

.react-select-box-native {
  position: absolute;
  left: -99999em;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<div class="react-select-box-container react-select-box-multi react-select-box-empty">
  <button id="react-select-box-2" class="react-select-box" tabindex="0" aria-hidden="true">
        <div class="react-select-box-label">
          Favorite Colors
        </div></button>

  <div class="react-select-box-options react-select-box-hidden" aria-hidden="true" tabindex="0">
    <div class="react-select-box-off-screen">
      <a id="react-select-box-2-0" href="#" class="react-select-box-option" tabindex="-1">Red</a>
      <a id="react-select-box-2-1" href="#" class="react-select-box-option" tabindex="-1">Green</a>
      <a id="react-select-box-2-2" href="#" class="react-select-box-option" tabindex="-1">Blue</a>
    </div>
    <button class="react-select-box-close">Close</button>
  </div>

  <div class="react-select-box-native">
    <label for="react-select-box-2-native-select">Favorite Colors</label>
    <select id="react-select-box-2-native-select" multiple="multiple">
            <option value="red">
              Red
            </option>
    
            <option value="green">
              Green
            </option>
    
            <option value="blue">
              Blue
            </option>
          </select>
  </div>
</div>