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Project_CampusLostAndFoundP.../src/wh.vue

44 lines
864 B

<template>
</template>
<script>
var data = {name: 'kindeng'};
observe(data);
data.name = 'dmq'; // 哈哈哈,监听到值变化了 kindeng --> dmq
function observe(data) {
if (!data || typeof data !== 'object') {
return;
}
// 取出所有属性遍历
Object.keys(data).forEach(function(key) {
defineReactive(data, key, data[key]);
});
};
function defineReactive(data, key, val) {
observe(val); // 监听子属性
Object.defineProperty(data, key, {
enumerable: true, // 可枚举
configurable: false, // 不能再define
get: function() {
return val;
},
set: function(newVal) {
console.log('哈哈哈,监听到值变化了 ', val, ' --> ', newVal);
val = newVal;
}
});
}
export default {
}
</script>
<style>
</style>