Question

如果单击列表项，则需要按字母顺序显示名称。我正在为此使用Vue.js和Flex Grid。

我有一个名为ListAll的列表项，

在单击ListAll时，我必须显示所有由nameList数组中的名称分组的记录。我在显示分组名称时遇到问题。我正在使用Flex Grid显示名称。显示A的记录后，B的记录应从新行开始，但B记录不能中断到新行。如何使用Vue js或ES6或CSS语法在每组名称后添加换行符？

我已经添加了一个<div class="break"></div>这样的换行符，但是它并没有打破记录。

使用这样的flexbox网格CSS类，记录以4列显示，没有换行符，

Apples Apricots Avocados Almond
Abiu Berry Bananas Boysenberries 
Blueberries Breadfruit Carambola Cantaloupe 
Cranberries Cherries Custard-Apple

预期结果：

Apples Apricots Avocados Almond
Abiu 
Berry Bananas Boysenberries Blueberries 
Breadfruit
Carambola Cantaloupe Cranberries Cherries
Custard-Apple

AlphabeticalFruitsName.vue

<template>
    <div id="wrapper">
        <ul class="listitems">
            <li><a
                href="javascript:;" @click="userSelection('ListAll')">ListAll</a>
            </li>
        </ul>
        <div class="grid-container">
            <div v-for="(name, index) in nameList" :key="name" class="grid-item">
                <ul v-for="letter in alphabets" :key="letter">
                    <li v-if="name.startsWith(letter)"><a>{{ name }}</a></li>
                    <div class="break"></div>
                </ul>
            </div>
        </div>
    </div>
</template>

<script>
export default {
  name: 'AlphabeticalFruitsName',
  data() {
    return {
      nameList: [],
      alphabets: ['A','B','C','D','E','F','G','H','I','J','K','L',
        'M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',],
      names: [
        { name: 'Apples' },{ name: 'Apricots' },{ name: 'Avocados' },{ name: 'Apple Berry' },
        { name: 'Apple guava' },{ name: 'Almond' },{ name: 'Almond' },{ name: 'African Honeysuckle' },
        { name: 'African Plum' },{ name: 'Abiu' },{ name: 'Bananas' },{ name: 'Boysenberries' },
        { name: 'Blueberries' }, { name: 'Bing Cherry' },{ name: 'Breadfruit' },{ name: 'Cantaloupe' },
        { name: 'Carambola' },{ name: 'Cherimoya' },{ name: 'Cherries' },{ name: 'Cranberries' },
        { name: 'Custard-Apple' },{ name: 'Dates' }, { name: 'Honeysuckle' },{ name: 'Gooseberries' },
        { name: 'Grapefruit' },{ name: 'Grapes' },{ name: 'Guava' },{ name: 'Tangerine' },
        { name: 'Kiwi' },{ name: 'Lychee' },{ name: 'Strawberries' }, { name: 'Watermelon' }],
    };
  },
  methods: {
      userSelection(listItemName) {
      this.nameList = [];
      if (listItemName === 'ListAll') {
        for (const value of this.names) {
          this.nameList.push(value.name);
        }
      }
    },
  },
};
</script>

<style lang="scss" scoped>
.listitems {
display: flex;
justify-content: center;
}

ul {
    list-style-type: none;
}

.grid-container {
    display: grid;
    grid-template-columns: auto auto auto auto;
    padding: 10px;
}

.grid-item {
    text-align: center;
}

.new-line:last-child {
    content: '\a';
    white-space: pre;
}

.break {
    flex-basis: 100%;
    height: 0;
}
</style>

Answer 1

这将检查第一个元素之后的每个元素，以查看当前名称的第一个字母和以前的名称是否不匹配，如果不匹配，它将输出br。我假设您的列表已经按字母顺序排列。

<div v-for="(name, index) in nameList" :key="name" class="grid-item">
    <ul v-for="alphabet in alphabets" :key="alphabet">
        //a BR or whatever element you need
        <br v-if="i > 0 && nameList[i-1].name.charAt(0) !== name.charAt(0)"/>
        <li v-if="name.startsWith(alphabet)"><a>{{ name }}</a></li>
        <div class="break"></div>
    </ul>
</div>

如何使用CSS在Vue JS v-for循环中添加换行符

1 个答案: