How to use Vue to implement fixed header effects

How to use Vue to implement fixed header effects

In developing web applications, we often encounter situations where we need to fix headers in tables. Fixed table headers allow users to easily view header information when the table content is long, improving user experience. This article will introduce how to use Vue to implement fixed header effects, and attach specific code examples for reference.

1. Create a Vue project and introduce the required dependencies

First, we need to create a Vue project and introduce the required dependencies. Execute the following command in the command line to create a new Vue project:

vue create fixed-table-header

Then, enter the project directory and install element-ui as our UI framework:

cd fixed-table-header
npm install element-ui

2. Create Table component

Create a Components directory in the src directory and create a .vue file named FixedTableHeader in it. The code for writing the table component in this file is as follows:

<template>
  <div class="fixed-table-header">
    <el-table
      :data="tableData"
      style="width: 100%"
      header-row-class-name="header-row"
      row-class-name="table-row"
      :header-cell-style="fixedHeaderStyle"
    >
      <el-table-column
        prop="name"
        label="姓名"
      ></el-table-column>
      <el-table-column
        prop="age"
        label="年龄"
      ></el-table-column>
      <el-table-column
        prop="gender"
        label="性别"
      ></el-table-column>
    </el-table>
  </div>
</template>

<script>
export default {
  data() {
    return {
      tableData: [
        {
          name: "张三",
          age: 20,
          gender: "男"
        },
        {
          name: "李四",
          age: 22,
          gender: "女"
        },
        // 更多数据...
      ]
    };
  },
  computed: {
    fixedHeaderStyle() {
      const headerHeight = 40; // 表头高度
      return `height: ${headerHeight}px; line-height: ${headerHeight}px;`;
    }
  }
};
</script>

<style scoped>
.fixed-table-header {
  width: 100%;
  height: 300px;
  overflow-y: scroll;
}

table .header-row {
  position: sticky;
  top: 0;
  z-index: 1;
}

table .table-row {
  background-color: #f9f9f9;
}

.el-table__header-wrapper {
  overflow: hidden;
}
</style>

In the above code, we use the el-table component of element-ui to display table data. In order to achieve the effect of fixed table header, we specified the .header-row and .table-row style classes for the header-row-class-name attribute and row-class-name attribute of the table respectively, and used the sticky attribute of CSS to Top the table.

We also use computed properties to dynamically set the style of the table header. An object is returned through the fixedHeaderStyle calculated property. The style property of the object is set to a fixed header height, and the table is set through CSS styles. Header height and row height.

3. Using the table component in App.vue

In the App.vue file in the src directory, use the table component FixedTableHeader just created as follows:

<template>
  <div id="app">
    <FixedTableHeader />
  </div>
</template>

<script>
import FixedTableHeader from "./components/FixedTableHeader.vue";

export default {
  name: "App",
  components: {
    FixedTableHeader
  }
};
</script>

<style>
#app {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
</style>

4. Run the project and view the effect

Finally, use the following command to run the project and view the effect of the fixed header in the browser:

npm run serve

Through the browser Visit http://localhost:8080 to see the table with fixed header effects.

Summary

This article introduces how to use Vue to implement fixed header effects and provides specific sample code. By using the el-table component of element-ui and the sticky attribute of CSS, we can easily achieve the effect of fixed table headers and improve the user experience. In actual projects, the style of the table can be customized as needed to meet the needs of the project.

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