SOURCE

new Vue({
    el: "#app",
    data: {
        keyword: '',
        showList: [],
        dataList: [
            {
                name: '张三',
                age: 18
            },
            {
                name: '李四',
                age: 19
            },
            {
                name: '王五',
                age: 22
            },
            {
                name: '赵六',
                age: 23
            },
            {
                name: '孙七',
                age: 25,
                obj: {
                    test: '123'
                }
            }
        ]
    },
    mounted() {
        this.showList = this.dataList
    },
    watch: {
        keyword(val) {
            if (!val) {
                this.showList = this.dataList
            } else {
                const result = this.dataList.filter(item => {
                    return Object.keys(item).some(key => {
                        return String(item[key]) !== "[object Object]" && String(item[key]).indexOf(this.keyword) > -1
                    })
                })
                this.showList = result
            }
        }
    },
    methods: {
    }
})

<div id="app">
  <input type="text" placeholder="请输入搜索" v-model="keyword">
  <ul>
      <li v-for="(item,index) of showList" :key="index">
        {{item.name + ':' + item.age + '岁'}}
      </li>
  </ul>
</div>