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watch's Issues

defineProperty的set应该加条件判断

在操作set回调之前应先判断新值和和旧值是否相等防止再watch里重复设置相同的值
set(newValue) {
if (val !== newValue) { // 条件判断
watchFun.call(page, newValue, val);
val = newValue;
if (deep) {
this.observer(obj, key, watchFun, deep, page);
}
}
}

提个需求

watch内增加个接口能调用本页面内的函数方法,例如this.setData

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