Vue.js 中 Chrome 和 Datalist 的性能问题 [英] Performance problems with Chrome and Datalist in Vue.js

问题描述

我在使用谷歌浏览器(最新版本:83.0.4103.97)的 vue.js 中的 datalist 存在性能问题.我不得不说我几个月前开始学习 Vue.js 所以我还是个菜鸟.使用 Firefox 一切正常，数据列表和过滤立即生效.使用 Chrome 一切都很慢......我在输入字段中输入，字母显示非常缓慢(或一次全部显示)，我必须等待很多秒钟才能应用过滤器.在此之后，我必须在元素上多次单击以填充该字段.以下是浏览器行为和部分代码的视频.

I have a performance problem with datalist in vue.js with Google Chrome (latest version : 83.0.4103.97). I have to say i started to learn Vue.js few month ago so i m still a noob. With Firefox everything is ok, the datalist and filtering works instantly. With Chrome everything is slow... I type in the input field, the letters appear very slowly (or all at once) and i have to wait a lot of seconds for the filter applies. After this i have to click multiple times on the element to fill the field. Here are videos of both browsers behavior and parts of my code.

火狐:https://streamable.com/vj4rbb

Chrome:https://streamable.com/2sikq5

组件代码:

<b-input-group size="sm" v-if="menuEditState">
  <b-form-input
    :list="`mealDish${meal.id}`"
    :id="`input${meal.id}`"
    placeholder="Selectionner un plat"
    v-model="name"
    :class="{'is-invalid': $v.name.$anyError}"
  />
  <datalist :id="`mealDish${meal.id}`">
    <option v-for="dish in activeDishesByType" :value="`${dish.name} (${dish.humanType})`" :data-value="dish.id"></option>
  </datalist>
  
  <b-input-group-append>
    <b-button variant="primary" @click="onClick" :disabled="loading">
      <i :class="loading ? 'fa fa-spin fa-circle-notch' : 'fa fa-plus'" />
    </b-button>
  </b-input-group-append>
</b-input-group>

和脚本

  computed: {
...mapGetters({
  activeDishesByType: 'activeDishesByType',
}),

getter 基于 getter 中的 Vuex 状态排序(如果我使用没有 getter 排序的状态，我有相同的行为).

The getter is based on a Vuex state sort in a getter (I have the same behavior if i use the state without the getter sorting).

我知道 chrome 开发工具中有一个性能监视器，我试图找到可以帮助我解决这个问题的东西，但我不知道在哪里搜索所有这些信息.

I know there is a performance monitor in chrome dev tools and i try to find something which could help me fixing this but i dont know where to search in all theses informations.

感谢您的帮助.

罗曼.

推荐答案

好的，我终于找到了是什么元素在 Chrome 中导致了如此多的性能问题.它在数据列表选项中的值...所以我设法在数据列表中只使用 data-* 和 text .请随时改进或添加评论.

Ok so i finally find what element was causing so much performances issues in Chrome. Its the value in the datalist options... So i managed to use only data-* and text in the datalist. Please dont hesitate to improve this or add comments.

不再有价值"在数据列表上:

No more "value" on the data-list :

 <b-input-group size="sm">
  <b-form-input
    :list="`mealDish${meal.id}`"
    :id="`input${meal.id}`"
    placeholder="Selectionner un plat"
    v-model="name"
  />
  <datalist :id="`mealDish${meal.id}`">
    <option v-for="dish in activeDishesByType" :data-value="dish.id">{{
      `${dish.name} (${dish.humanType})`
    }}</option>
  </datalist>
  
  <b-input-group-append>
    <b-button variant="primary" @click="onClick" :disabled="loading">
      <i :class="loading ? 'fa fa-spin fa-circle-notch' : 'fa fa-plus'" />
    </b-button>
  </b-input-group-append>
</b-input-group>

以及在数据列表选项中搜索以恢复我的数据值:

And the search in the datalist options for bringing back my data-value :

  // Get the selected/typed value
  const shownVal = document.getElementById(`input${this.meal.id}`).value;
  const datalist = document.querySelector(`#mealDish${this.meal.id}`);
  // Find the option in the list and get the data-value (id)
  let dishId = null;
  for (var i = 0; i < datalist.options.length; i++) {
    if (datalist.options[i].text === shownVal) {
      dishId = datalist.options[i].dataset.value;
      break;
    }
  }

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