JavaScript hook

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8"/>
        <script src="vue.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/velocity/1.2.3/velocity.min.js"></script>
    </head>
    <body>
        <div>
        <h1>--JavaScript 钩子--</h1>
        <div id="example1">
            <button @click="show = !show">Toggle</button>
            <transition
                v-on:before-enter="beforeEnter"
                v-on:enter="enter"
                v-on:leave="leave"
                v-bind:css="false"
            >
                <p v-if="show">Demo</p>
            </transition>
        </div>
        <script>
        // Vue 根实例
        var example1 = new Vue({
            el: '#example1',
            data: {
                show: false
            },
            methods: {
                beforeEnter: function (el) {
                    el.style.opacity = 0
                    el.style.transformOrigin = 'left'
                },
                enter: function (el, done) {
                    Velocity(el, { opacity: 1, fontSeze: '1.4em' } ,{duration: 300})
                    Velocity(el, { fontSize: '1em' }, { complete: done })
                },
                leave: function (el, done) {
                    Velocity(el, { translateX: '15px', rotateZ: '50deg' }, { duration: 600 })
                    Velocity(el, { rotateZ: '100deg' }, { loop: 2 })
                    Velocity(el, {
                        rotateZ: '45deg',
                        translateX: '30px',
                        translateX: '30px',
                        opacity: 0
                    }, { complete: done})
                },
            }
        })
        </script>
        </div>        
    </body>
</html>
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