Question

我想知道如何检查＆＃34; novalue＆＃34;存在例如：

{
    name: "maria",
    city_id: "novalue"
    ....
}

我如何在Vue中这样做？在<div v-if="condition">或函数中执行吗？

Answer 1

如果您想/可以使用ES7功能：

const containsKey = (obj, key ) => Object.keys(obj).includes(key);

实施例：

const someCoolObject = {name: 'Foo', lastName: 'Bar'};

const hasName = containsKey(someCoolObject, 'name');
const hasNickName = containsKey(someCoolObject, 'hasNickName');

console.log(hasName, hasNickName); // true, false

对于Vue：

组件：

{
    methods: {
        containsKey(obj, key ) {
            return Object.keys(obj).includes(key);
        }
    },
    computed: {
        hasName() {
            return this.containsKey(this.someObject, 'name');
        }
    }
}

模板：

<div v-if="hasName"></div>

使用Vue验证内容密钥Json是否存在

1 个答案: