“cannot read property 'constructor' of undefined”是一个运行时错误,表明你的代码试图访问一个未定义对象的属性。在这个具体的例子中,尝试访问的属性是'constructor'。'constructor'属性通常用于引用创建对象实例的构造函数。 3. 查找错误位置 为了找到错误的具体位置,你需要检查你的代码,特别是那些尝试访
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使用Public Class Fields 的这种写法,就解决了这个问题。灵位还有其他若干种办法,比如先定义原型方法,然后在constructor 里边bind 一遍,或者使用decorator 进行bind 等: class A { constructor() { this.a = this.a.bind(this) } a() {} // or @bindthis b() {} } 1 2 3 4 5 6 7 8 9 10 11 ...
出现错误"Cannot read property 'top‘of undefined“ 出现"Cannot read property 'getFoodX‘of undefined“错误 error in nexttick: "typeerror: cannot read property 'key' of undefined" 如何修复“TypeError: Cannot read property”items of undefined“ 收到错误"TypeError: Cannot read property 'channel‘of...
“TypeError: Cannot read property ‘_wrapper’ of undefined” vscode+vue报错:“TypeError: Cannot read property ‘_wrapper’ of undefined” 原因:click绑定事件没有体现在method...TypeError: Cannot read property '$createElement' of undefined 使用vue-router,在main.js中import组件,初始化后报错: Failed ...
在React开发中,遇到cannot read property 'props' of undefined错误通常是由于组件在初始化时尝试访问其props属性,但此时组件尚未正确挂载或初始化。以下是关于这个问题的详细解释、原因分析以及解决方案。 基础概念 在React中,组件的props是父组件传递给子组件的数据。每个组件实例都有其自己的props对象,通过this....
TypeError:Cannot read property'instance'ofundefined Also, everytime I want to refer to Scheduler It seems to be undefined. Imports are fine. For eg: @ViewChild(BryntumSchedulerComponent,{static:true})schedulerComponent:BryntumSchedulerComponent;ngAfterViewInit():void{this.scheduler=this.schedulerComponen...
使用Public Class Fields 的这种写法,就解决了这个问题。另外还有其他若干种办法,比如先定义原型方法,然后在 constructor 里面 bind 一遍;或者使用 decorator 进行 bind 等: class A { constructor() {this.a =this.a.bind(this) } a() {}//or@bindthis ...
vuex TypeError: Cannot read property 'commit' of undefined 自定义组件 box.vue methods: { cancleBtn () { this.show = false; }, successBtn () { this.show = false, this.addMemberList = this.resultList; self.$store.commit("addMemberList", this.addMemberList);...
vuex TypeError: Cannot read property 'commit' of undefined 自定义组件 box.vue methods: { cancleBtn () { this.show = false; }, successBtn () { this.show = false, this.addMemberList = this.resultList; self.$store.commit("addMemberList", this.addMemberList);...