本文介绍了查看计算属性的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个具有以下哈希值的组件
I have a component with the following hash
{
computed: {
isUserID: {
get: function(){
return this.userId?
}
}
}
我应该关注 isUserID
还是 userId
的变化?你能看计算属性吗?
Should I be watching isUserID
or userId
for changes? Can you watch computed properties?
推荐答案
是的,你可以设置 watcher 在 computed 属性上,请参阅 fiddle.
Yes, you can setup watcher on computed property, see the fiddle.
以下是在计算属性上设置监视的代码:
Following is the code to set watch on computed property:
const demo = new Vue({
el: '#demo',
data() {
return {
age: ''
};
},
computed: {
doubleAge() {
return 2 * this.age;
}
},
watch: {
doubleAge(newValue) {
alert(`yes, computed property changed: ${newValue}`);
}
}
});
这篇关于查看计算属性的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!