Describe the bug It seems that the computed properties do not update when updating props within a Vue component. I like to have a test start at one state, then update to create a next state, and test against this new state. Lets say we h...
【摘要】 例如get依赖于window.location.href或者外部js变量,这些情况get的刷新会遇到问题,需要采用vue环境中的this.$route.fullPath或者进行一些人为的事件绑定和设置;此外get依赖Promise结果可能需要采用asyncComputed或者改成不依赖异步结果的形式;另外还要注意computed中访问data成员需要使用this.$data形式获取;此外,g......
ThemessageSubstrcomputed property function does not seem to be called when the query is complete, and so its value remains undefined (its initial value). System Info No response Any additional comments? The behavior can be worked around by manually updating the property (e.g. usingmanual: true...
对于响应式数据比较简单就是创建对应的proxy代理,了解更多可以查看《Vue3.2x源码解析(三):深入响应式原理》,对于computed和watch监听器的初始化可以看【3,扩展】。 在解析finishComponentSetup之前,我们还得了解一下setupResult的处理: handleSetupResult(instance, setupResult, isSSR) handleSetupResult // packages/...
("Getter is missing for computed property \"" + key + "\"."), vm ); }if(!isSSR) {//create internal watcher for the computed property.//对computed内部属性进行监听,传入lazy为true,这个值将用于缓存判断watchers[key] =newWatcher( vm, ...
avoid unnecessary re-renders when computed property value did not change (#7824) (653aac2), closes #7767RevertsRevert "refactor: remove unnecessary checks (#7875)" (903be9b), closes #7875 2.5.16 (2018-03-13)Bug Fixesallow multiline expression in v-for (71b4b25), closes #7792 core:...
And here, I have this, whatever this .counter is, it's just gonna be that +1. So no matter how many times I change that, that computed property is always going to only evaluate when this .counter changes. And it's going to always return this .counter +1....
代码语言:javascript 复制 ...exportfunctioninitGlobalAPI(Vue:GlobalAPI){// config// 提供获取配置项的方法, 不允许在这里设置配置项constconfigDef={}configDef.get=()=>configif(process.env.NODE_ENV!=='production'){configDef.set=()=>{warn('Do not replace the Vue.config object, set individual...
For each async computed property, an object is added to$asyncComputedthat contains information about the current computation state of that object. This object contains the following properties: {// Can be one of updating, success, errorstate:'updating',// A boolean that is true while the prope...
Later, we’ll be looking at computed properties, which we can use to make the preceding code a lot cleaner—it’s a bit repetitive. In addition to using directives, we can also pass data into templates by using interpolation,as follows: ...