GSAP implementing to Vue.js app with webpack - vue.js

Question

i have a problem with implementing GSAP to my vue.js app which i created with vue-cli and webpack
What i wanna do?
1- I tried to create tween beforeComponent mounting, in some function.
What i tried?
1- I create my vue app,
2- I already installed this package, with:
npm install greensock --save
everything is was okey with installation, then;
3- I imported TweenMax to main.js with this way:
import { TweenMax } from 'greensock';
4- I created some div into my component for animating with TweenMax.
5- I create some functions into methods of my component which wrapping the Tween,
methods: {
animate: function() {
TweenMax.to(".rect", 1, {x:100, alpha:0, ease:Sine.easeIn});
console.log('test');
}
},
and then i call this function on before mounting component;
beforeMount(){
this.animate()
}
so my tween not working, i'm not getting some error in my console.
I print the console.log("test"); for testing the function is work or not?.
result is function work. I'm getting the test message on console. But tween is no there :) .
Where i make mistake ?
Fully code of my component:
<template>
<div class="container">
<div class="home">
<h1>
HELLO
</h1>
<h4>
How are u doing?
</h4>
</div>
<div class="rect">
</div>
</div>
</template>
<script>
export default {
name: 'Home',
methods: {
animate: function() {
TweenMax.to(".rect", 1, {x:100, alpha:0, ease:Sine.easeIn});
console.log('test');
}
},
beforeMount(){
this.animate()
}
}
</script>
<style lang="scss">
.rect {
background-color:blue;
width: 10vw;
height: 100px;
position: absolute;
z-index: -1;
}
</style>
FIX . ///////////
While i wait to answer :) found the solution myself,
everything is fine with code, just need to call function not on beforeMount(), need to call it on mounted();