angular6

问题 I've been struggling to find a way to dynamically change the background color of a material design expansion panel header based on whether or not the panel is expanded. When the panel is closed I'd like the background color to be white, but when it is expanded I want to change that color to something else. I'm not seeing something I can base this change off of, maybe I'm missing something. I'm new to angular and was thinking I would just be able to base it off of [expanded]'s setting but it

问题 Using npm, I followed the getting started directions on the Angular CLI quick start page. Angular CLI Quickstart Running ng serve --open after creating and going into my new project "frontend" gave this error: Could not find module "@angular-devkit/build-angular" from "C:\\Users\\Brandon\\project-name\\frontend". Error: Could not find module "@angular-devkit/build-angular" from "C:\\Users\\Brandon\\project-name\\frontend". at Object.resolve (C:\Users\Brandon\project-name\node_modules\@angular

问题 There is one requirement to use an external service from within our Angular Application. The external service has its own User Interface. So, we have to redirect to the external service using a pure HTTP Post request on the given External Service's URL. Is there a way to do non-AJAX post call from Angular so that the screen redirects to the external service webpage. 回答1: The solution is to dynamically create a form on fly and submit. I created a method in a Service class something like below

问题 I have understand concept of recursive elements(tree view) from below. Link 1 In my case, I want to use it with forms; let's say simple text input recursively. JSON structure of form is as below. JOSN Structure I have prepared below code.I am getting Maximum call stack size exceeded error by executing below code. Below is my component.html file. <form [formGroup]="testForm" (ngSubmit)="onSubmit()"> <div formArrayName="element"> <ng-template #recursiveList let-list> <div *ngFor="let item of

问题 I have understand concept of recursive elements(tree view) from below. Link 1 In my case, I want to use it with forms; let's say simple text input recursively. JSON structure of form is as below. JOSN Structure I have prepared below code.I am getting Maximum call stack size exceeded error by executing below code. Below is my component.html file. <form [formGroup]="testForm" (ngSubmit)="onSubmit()"> <div formArrayName="element"> <ng-template #recursiveList let-list> <div *ngFor="let item of

问题 I have understand concept of recursive elements(tree view) from below. Link 1 In my case, I want to use it with forms; let's say simple text input recursively. JSON structure of form is as below. JOSN Structure I have prepared below code.I am getting Maximum call stack size exceeded error by executing below code. Below is my component.html file. <form [formGroup]="testForm" (ngSubmit)="onSubmit()"> <div formArrayName="element"> <ng-template #recursiveList let-list> <div *ngFor="let item of

问题 I have been working with angular for the last few weeks, and now I have a requirement to dynamically style a public site. The site admin set various color codes as well as a logo image from admin in a database. These will be reflected when the Public Site opens. As I am from an asp.net background, previously what I would do is on master page load, take values from the DB and write them into a .less file, and let java-script library take care of it. It's simple there. But for my current

问题 I have been working with angular for the last few weeks, and now I have a requirement to dynamically style a public site. The site admin set various color codes as well as a logo image from admin in a database. These will be reflected when the Public Site opens. As I am from an asp.net background, previously what I would do is on master page load, take values from the DB and write them into a .less file, and let java-script library take care of it. It's simple there. But for my current

问题 I want to filter a list of JSON objects (Products) by the variable 'category' using a checkbox. a porduct is a followed : { 'bikeId': 6, 'bikeName': 'Kids blue bike', 'bikeCode': 'KB-3075', 'releaseDate': 'June 28, 2016', 'description': 'Kids blue bike with stabalizers', 'category': 'kids', 'price': 290.00, 'starRating': 4.8, 'imageUrl': 'https://openclipart.org/image/2400px/svg_to_png/1772/bike-kid.png' } My current ngFor Loop is as followed: <tr *ngFor="let product of products"> <td><img

问题 I want to filter a list of JSON objects (Products) by the variable 'category' using a checkbox. a porduct is a followed : { 'bikeId': 6, 'bikeName': 'Kids blue bike', 'bikeCode': 'KB-3075', 'releaseDate': 'June 28, 2016', 'description': 'Kids blue bike with stabalizers', 'category': 'kids', 'price': 290.00, 'starRating': 4.8, 'imageUrl': 'https://openclipart.org/image/2400px/svg_to_png/1772/bike-kid.png' } My current ngFor Loop is as followed: <tr *ngFor="let product of products"> <td><img