template code description: Angular6 response form has two FormControl, indicating name and age: name: < input type= "text " formControlName= "name " > < div > Age: < input type= "text " formControlName= "age " > < div > what I want to ach...
in Vue-router, you can set keep-alive to keep components from being destroyed, which is good for recording user form submissions and multiple filters. similar requirements are encountered in the angular4 project. Currently, we can only use a large num...
problem description in https: www.angular.cn, the parent component passes the value to the child component with one-way binding. In this case, @ input, is used instead of @ output,. But when I modify the value in the input in the child component, I ...
Code address https: github.com wohuifude1. ERROR in . src app app.module.ts Module parse failed: Users univer Desktop company angular-dream src app app.module.ts Unexpected character @ (8:0) You may need an appropriate loader to handle this fil...
smooth animation can be achieved normally using the following code in js. animate () { requestAnimationFrame (animate); TWEEN.update (); } animate (); use Times error in angular as follows: animate () { this.animate = this.animate.bind (this); ...
< H2 > problem scenario < H2 > The child component is referenced in the parent component, as follows: app.html <app-parent> <app-child>< app-child> < app-parent> I want to get the parent component or child component i...
as shown in the figure, how to click on the answer and automatically slide left to switch to the next question. Angular4, is currently used in the project. Can ionic achieve the above dynamic effect? how to implement ...
A date conversion method that displays both mouse over format and subDays. always prompts for one more parameter. What s wrong? export interface Age { age: number; unit: AgeUnit; } const age$ = Observable .combineLatest(ageNum$, ageUnit...
<li nz-submenu [(nzOpen)]="item.open" *ngFor="let item of menuList"> <span title>{{item.parent}}< span> <ul> <li nz-menu-item [routerLink]="[ {item.path} ]" routerLinkAct...
The relationship is not clear, what is the problem? 1.Quote.service import { Injectable, Inject } from @angular core ; import { Observable } from rxjs Observable ; import { Http } from @angular http ; import { Quote } from .. domain quot...
No label closure error was found. What s the problem TaskHomeComponent.html fragment: <div class="task-lists"> <app-task-list class="list-container" app-droppable [dropTags]="[ task-item , task-list ...
this set of forms has three sets of states, but input is required and needs to be validated. When input is hidden, you don t need to validate the form, and you don t need its value; now, with this switch, how do you create FormGroup optimization...
what is the lack of introduction? I didn t find it again. Template code snippet: <div md-subheader class="header-container"> <div> <h3>{{header}}< h3> < div> <div class="fill"> ...
looked up for a long time, but couldn t find out how to use the command to create services, components, etc., in the specified directory, and moved the directory files manually each time. for example, I want to put the member management page in the s...
using MdDialog to report errors, do you need dependency injection in AppModule? TS code snippet: import { MdDialog } from @angular material ; constructor(private dialog: MdDialog) { } openNewProjectDialog() { this.dialog.open(NewProjectCompo...
requirements and problems as shown in the following figure: https: nghttps: api-v5.segmentfault.com question .anthttps: api-v5.segmentfault.com question .design versionhttps: api-v5.segmentfault.com question . 1https: api-v5.segmentfault.com...
problem description For the project of angular-material, I want to change it to generate the page tag dynamically through the json string passed in the background. If I haven t done it, I want to try a simple first. htmlString = " 1111111 < div ...
I have the following questions: 1. Whether to use the radio attribute of input 2. Do not know how to display each question and answer on a different page 3. I have tried it myself, but the final demo is that all the test questions and answers are dis...
in the electron project that has already been done, download a word document. How can electron have a prompt after the download is successful? ...
such as < md-slide-toggle (change) = "onChange ($event.checked) " > switch < md-slide-toggle > , event binding. $event is a DOM Event object, where $event.checked how does the boolean value be generated? Template fragment: <md-slide-togg...
<style> .a{ font-size: 100px; position: relative; } .b{ position: absolute; color: red; top: 0; left: 0; } < style> <s...
https: graph.qq.com oauth2.0 show?which=Login&display=pc&client_id=your_client_id&response_type=code&redirect_uri=your_redirect_uri&state=your_state so I want to generate the above your_state myself, how to do it? ...
scenarios are as follows: I wrote the code related to the end touch event, which determines whether to use the touch event or the mouse event according to ua and ( touchstart in window)). but when testing jest, the default ua is PC. How to chan...
import numpy as np def f(x): tmp = x[0] print(tmp) x[0] = tmp + 0.1 print(tmp + 0.1) print(x[0]) is called via f (np.array ([1jin2])), and the result is . 1 1.1 1 is called via f (np.array ([1.0j 2.0])), and the result is 1...
The database has two tables for students and classes, and the field classId in the student table is associated with the field id in the class table. in a transaction, I first changed the classId of student2 in the student table to 1, and then went ...