For example, you want to make a portfolio of your projects. It would be a cool feature on your website to have the picture of your project move on hover.

With this small tutorial, it will allow you to activate a .gif when hovered over a picture.

1. Set up vue project

Create your vue-project, follow the steps and cd into it.

vue create vue-hover-picture

2. Clean up project

For this, we'll stick to the HelloWorld.vue component. Get rid of all the code in both HelloWorld.vue and the App.vue component.

Load the image in the HelloWorld.vue component, like below.

<template>
  <div class="hello">
    <img :src="pictureStatic">
  </div>
</template>

<script>
export default {
  name: 'HelloWorld',
  data () {
    return {
      pictureStatic: require("../assets/todo.png")
    }
  }
}
</script>

<style scoped> 
img {
  height: 500px;
}
</style>

We now have a picture loaded in our component. We want this picture to become a .gif when we're hovering.

3. Hover function

In vue, we can use @mouseover and @mouseleave events. We can pass in the boolean hover where it will be true in the @mouseover event and, surprise, false with @mouseleave.

As we're using this in our code and using it further on in a function, add it to our data and set it to false. Let's also import our .gif.

export default {
  name: 'HelloWorld',
  data () {
    return {
      pictureStatic: require("../assets/todo.png"),
      pictureGif: require("../assets/todo.gif"),
      hover: false
    }
  }
}

Next, we are going to use a function to determine the src of our image, whether it's hovered or not.

Add the computed part and write a new function, let's call it pictureHover. So we can write out a simple function, using hover as our conditional statement.

computed: {
    pictureHover () {
      if (this.hover == true) {
        return this.pictureGif
      } else {
        return this.pictureStatic
      }
    }
  }

Now we should change our html code of the image. We can pass in this function pictureHover() to our src attribute of our image:

<img :src="pictureHover" @mouseover="hover = true" @mouseleave="hover = false">

And that's it! You can now put in a small live preview of your project when people hover over the picture.