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In web design, the footer is one of the most important components on the page. It usually contains copyright information, contact information, and other relevant information about the website. However, when users scroll the page, the footer may disappear above the screen, which may prevent users from easily accessing the footer information. Therefore, creating a sticky footer can ensure that users can always access the footer information without having to worry about it disappearing.

In this article, we'll look at how to create a sticky footer in Vue.

Creating a Basic Template

First, create a basic template in Vue that contains a header, body, and footer. Here is a simple example:

<template>
  <div id="app">
    <header>
      <!-- Header Content -->
    </header>
    <main>
      <!-- Main Content -->
    </main>
    <footer>
      <!-- Footer Content -->
    </footer>
  </div>
</template>

Fix footer to bottom

To fix the footer at the bottom, we can use the CSS positionproperty. positionSet the footer's property to fixed, and its bottomproperty to 0, which will make the footer always stay at the bottom of the page.

<style>
  footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    height: 50px;
    background-color: #f2f2f2;
  }
</style>

At this point, the footer will be sticky fixed to the bottom of the page, but when the page is too long, the footer may block the main content.

Use Vue to monitor page height

To prevent the footer from blocking the main content, we need to use Vue to monitor the page height. We can use window.innerHeightto get the current viewport height and compare it with the total height of the page. If the page height is less than the viewport height, the footer is fixed to the bottom; otherwise, the footer is kept at the bottom to ensure it is visible.

Here is a simple Vue listener example:

<script>
  export default {
    data() {
      return {
        footerFixed: false
      }
    },
    created() {
      window.addEventListener('resize', this.handleResize)
      this.handleResize()
    },
    destroyed() {
      window.removeEventListener('resize', this.handleResize)
    },
    methods: {
      handleResize() {
        this.footerFixed = window.innerHeight > document.body.offsetHeight
      }
    }
  }
</script>

In this example, we use window.addEventListenerlisten to window size changes and use this.handleResizethe method to call when the component is created and when it is destroyed. handleResizeThe method compares the viewport height to the page height and uses this.footerFixedthe property to set the fixed state of the footer to trueor false.

Dynamically set footer style

Finally, we need to dynamically style the footer based on its pinned state. We can use Vue's :classbindings to apply different styles to the footer.

Here is a simple example:

<template>
  <div id="app">
    <header>
      <!-- Header Content -->
    </header>
    <main>
      <!-- Main Content -->
    </main>
    <footer :class="{ 'fixed': footerFixed }">
      <!-- Footer Content -->
    </footer>
  </div>
</template>

<style>
  footer {
    position: absolute;
    width: 100%;
    height: 50px;
    background-color: #f2f2f2;
  }

  .fixed {
    position: fixed;
    bottom: 0;
  }
</style>

In this example, we use the :class="{ 'fixed': footerFixed }"class fixedto apply to the footer if footerFixedthe property is true.

Summarize

Creating a sticky footer in Vue requires the use of the CSS sticky positionfooter property and Vue window.innerHeightsticky footer listeners. By using these techniques, we can ensure that users can always access the footer information without having to worry about it disappearing.