SOURCE

new Vue({
    el : '#demo' ,
    data : {
        list : [] ,
        search_text : ''
    },
    created () {
        this.get_list();
    },
    watch : {
        search_text : function () {
            this.get_list();
        }
    },
    methods : {
        get_list () {
        	const type = Math.floor(Math.random() * 10 + 1);
        	if(type < 2) {
                this.list = [
                    '123',
                    '31231231',
                    '231313123123',
                    '345345454',
                    '53534435345',
                    '342342342'
                ]
            }else if (type < 4) {
                this.list = [
                    'aaa',
                    'bb',
                    'cc',
                    'ddddd',
                    'dfadfafadf',
                    'dfadfafdadfasdfasf'
                ]
            }else if(type < 6) {
                this.list = [
                    'llllll',
                    'lllll',
                    'llll',
                    'lllll',
                    'llllllll',
                    'llllllll'
                ]
            }else if (type < 8) {
                this.list = [
                    'eeeeeee',
                    'eeeee',
                    'eeeee',
                    'eeeee',
                    'eeeee',
                    'eeeee'
                ]
            }else {
                this.list = [
                    'tttttttttt',
                    'tttttttttt',
                    'tttttttttt',
                    'tttttttttt',
                    'tttttttttt',
                    'tttttttttt'
                ]
            }
            
        }
    }
})

<div id="demo">
    <input type="text" v-model="search_text" />
    <ul>
        <li v-for='item in list' >{{ item }}</li>
    </ul>
</div>

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#demo {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

del {
  color: rgba(0, 0, 0, 0.3);
}