A spring-physics based animation library, in addition to more components, to cover most of the UI related animations, when CSS is not enough for you. It shipped with Composition-API-friendly animation functions to support model-based API, in additional to animation components for the ones who prefer the template-based way This library represents the Vue3 alternative for react-spring and react-motion.

Composition-API-friendly functions to support model-based API

• Spring
• Parallax
• Present

The primary animation component, which is a spring-physics based. Its main role is to move property from one value to another, with more natural animation and easing.

spring function task SpringValue as its first argument, and SpringProps optional as the second argument.

import { spring } from 'vue3-spring';

export default {
  name: 'App',
  setup() {
    // If you passed to the spring a number as it's value
    // it return a Vue ref object.
    const mySpring = spring(100 /* [, config] */);

    // To update the spring desired value
    mySpring.value = 200;

    return { mySpring };
  },
};

import { spring } from 'vue3-spring';

export default {
  name: 'App',
  setup() {
    // If you passed to the spring an object of values
    // it return a Vue reactive object, for those values
    const mySpring = spring({ x: 100, y: 20 }, { dumping: 5 });

    // To update the spring desired values
    mySpring.x = 200;
    mySpring.y = -10;

    return { mySpring };
  },
};

spring also accepts Vue reactive data type (reactive, ref) as its value. It will automatically update the current spring value, when the reactive values changed.

import { ref, reactive } from 'vue';
import { spring } from 'vue3-spring';

export default {
  setup() {
    const mouse = reactive({ x: 0, y: 0 });
    const mouseSpring = spring(mouse);

    // this will update mouseSpring as well
    mouse.x = 5;

    const singleValue = ref(0);
    const singleValueSpring = spring(singleValue);

    // this will update singleValueSpring as well
    singleValue.value = 5;

    return {
      mouseSpring,
    };
  },
};

To config the spring physical properties, and initial values

Spring value could be number, object, Vue reactive object, or Vue ref object.

Used move property from one value to another, based on the scrolled distance.

Used to apply CSS animation class to an element, when it enters the view-port.

Components for the ones who prefer the template-based way

• SpringProvider
• ParallaxProvider
• PresentProvider

SpringProvider accepts props same the spring function

<template>
  <spring-provider v-slot="{ value }" :to="positionX" :damping="10">
    <div class="circle" :style="{ transform: `translateX(${value}px)` }"></div>
  </spring-provider>
</template>

<script>
import { SpringProvider } from 'vue3-spring';

export default {
  name: 'App',
  components: { SpringProvider },
  data: () => ({
    positionX: 100,
  }),
};
</script>

<template>
  <spring-provider v-slot="{ x, y }" :to="mouse" :damping="10">
    <div class="circle" :style="{ transform: `translate(${x}px, ${y}px)` }"></div>
  </spring-provider>
</template>

<script>
import { SpringProvider } from 'vue3-spring';

export default {
  name: 'App',
  components: { SpringProvider },
  data: () => ({
    mouse: { x: 0, y: 0 },
  }),
};
</script>