Javascript `财产';活生生的';应用程序编译中不存在`
当我尝试运行angular应用程序时,我得到的错误如下:Javascript `财产';活生生的';应用程序编译中不存在`,javascript,angular,Javascript,Angular,当我尝试运行angular应用程序时,我得到的错误如下: ERROR in src/app/new-card-input/new-card-input.component.ts(25,24): error TS2339: Property 'alive' does not exist on type 'NewCardInputComponent'. 这里的问题是什么 这是我的密码: import { Component, EventEmitter, OnInit, Output, HostLi
ERROR in src/app/new-card-input/new-card-input.component.ts(25,24): error TS2339: Property 'alive' does not exist on type 'NewCardInputComponent'.
这里的问题是什么
这是我的密码:
import { Component, EventEmitter, OnInit, Output, HostListener, ViewChild } from '@angular/core';
import {NgForm, FormBuilder, FormGroup, Validators} from '@angular/forms';
import { takeWhile, debounceTime, filter } from 'rxjs/operators';
@Component({
selector: 'app-new-card-input',
templateUrl: './new-card-input.component.html',
styleUrls: ['./new-card-input.component.scss'],
host: {'class': 'col-4'}
})
export class NewCardInputComponent implements OnInit {
newCardForm: FormGroup;
@ViewChild('form') public form:NgForm;
constructor(fb:FormBuilder) {
this.newCardForm = fb.group({
'text': ['', Validators.compose([Validators.required, Validators.minLength(2)])],
});
this.newCardForm.valueChanges.pipe(
filter((value) => this.newCardForm.valid),
debounceTime(500),
takeWhile(() => this.alive)
).subscribe(data => {
console.log(data);
});
}
public newCard:any = {text:''}
@Output() onCardAdd = new EventEmitter<string>();
@HostListener('document:keypress', ['$event'])
handleKeyboardEvent(event: KeyboardEvent) {
if (event.code === "Enter" && this.newCardForm.valid) {
this.addCard(this.newCardForm.controls['text'].value);
}
}
addCard(text) {
this.onCardAdd.emit(text);
this.newCardForm.controls['text'].setValue('');
}
ngOnInit() {}
}
从'@angular/core'导入{Component,EventEmitter,OnInit,Output,HostListener,ViewChild};
从'@angular/forms'导入{NgForm,FormBuilder,FormGroup,Validators};
从'rxjs/operators'导入{takeWhile,debounceTime,filter};
@组成部分({
选择器:“应用程序新卡输入”,
templateUrl:'./new card input.component.html',
styleUrls:['./新卡输入.component.scss'],
主机:{'class':'col-4'}
})
导出类NewCardInputComponent实现OnInit{
新卡形式:FormGroup;
@ViewChild(“表单”)公共表单:NgForm;
构造函数(fb:FormBuilder){
this.newCardForm=fb.group({
'text':['',Validators.compose([Validators.required,Validators.minLength(2)]),
});
this.newCardForm.valueChanges.pipe(
过滤器((值)=>this.newCardForm.valid),
去BounceTime(500),
takeWhile(()=>this.alive)
).订阅(数据=>{
控制台日志(数据);
});
}
公共新卡:any={text:'}
@Output()onCardAdd=neweventemitter();
@HostListener('文档:按键',['$event']))
handleKeyboardEvent(事件:KeyboardEvent){
if(event.code==“Enter”&&this.newCardForm.valid){
this.addCard(this.newCardForm.controls['text'].value);
}
}
添加卡(文本){
this.onCardAdd.emit(文本);
this.newCardForm.controls['text'].setValue('');
}
ngOnInit(){}
}
有人帮我吗?您需要定义
private alive=true代码>以下是您正在学习的教程代码的当前步骤
从'@angular/core'导入{Component,EventEmitter,OnInit,Output,HostListener,ViewChild};
从'@angular/forms'导入{NgForm,FormBuilder,FormGroup,Validators};
从'rxjs/operators'导入{takeWhile,debounceTime,filter};
@组成部分({
选择器:“应用程序新卡输入”,
templateUrl:'./new card input.component.html',
styleUrls:['./新卡输入.component.scss'],
主机:{'class':'col-4'}
})
导出类NewCardInputComponent实现OnInit{
新卡形式:FormGroup;
私生活=真;
@ViewChild(“表单”)公共表单:NgForm;
构造函数(fb:FormBuilder){
this.newCardForm=fb.group({
'text':['',Validators.compose([Validators.required,Validators.minLength(2)]),
});
this.newCardForm.valueChanges.pipe(
过滤器((值)=>this.newCardForm.valid),
去BounceTime(500),
takeWhile(()=>this.alive)
).订阅(数据=>{
控制台日志(数据);
});
}
公共新卡:any={text:'}
@Output()onCardAdd=neweventemitter();
@HostListener('文档:按键',['$event']))
handleKeyboardEvent(事件:KeyboardEvent){
if(event.code==“Enter”&&this.newCardForm.valid){
this.addCard(this.newCardForm.controls['text'].value);
}
}
添加卡(文本){
this.onCardAdd.emit(文本);
this.newCardForm.controls['text'].setValue('');
}
ngOnInit(){}
}
您正在调用此函数。alive但之前未声明alive。如何声明它?我想那是来自rxjs
。不是吗?不是,它是一个局部范围属性。您可以将其添加到newCardForm:FormGroup;只需添加以下内容;错误会消失,尽管查看代码可能会发现其他错误。。。
import { Component, EventEmitter, OnInit, Output, HostListener, ViewChild } from '@angular/core';
import {NgForm, FormBuilder, FormGroup, Validators} from '@angular/forms';
import { takeWhile, debounceTime, filter } from 'rxjs/operators';
@Component({
selector: 'app-new-card-input',
templateUrl: './new-card-input.component.html',
styleUrls: ['./new-card-input.component.scss'],
host: {'class': 'col-4'}
})
export class NewCardInputComponent implements OnInit {
newCardForm: FormGroup;
private alive = true;
@ViewChild('form') public form:NgForm;
constructor(fb:FormBuilder) {
this.newCardForm = fb.group({
'text': ['', Validators.compose([Validators.required, Validators.minLength(2)])],
});
this.newCardForm.valueChanges.pipe(
filter((value) => this.newCardForm.valid),
debounceTime(500),
takeWhile(() => this.alive)
).subscribe(data => {
console.log(data);
});
}
public newCard:any = {text:''}
@Output() onCardAdd = new EventEmitter<string>();
@HostListener('document:keypress', ['$event'])
handleKeyboardEvent(event: KeyboardEvent) {
if (event.code === "Enter" && this.newCardForm.valid) {
this.addCard(this.newCardForm.controls['text'].value);
}
}
addCard(text) {
this.onCardAdd.emit(text);
this.newCardForm.controls['text'].setValue('');
}
ngOnInit() {}
}