angular7

Saving an image (retrieved from external library) locally - Angular?

北战南征 提交于 2019-12-11 05:24:33
问题 I'm really really new to Angular and all. So I've gotten a QR code image from a library (angularx-qrcode) generator. Here's the code to get the image: <qrcode [qrdata]="'Your QR code data string'" [size]="256" [level]="'M'"></qrcode> Now I wanna have a button that allows the user to save the above image locally. How can I achieve this? Also is the syntax different for different Angular versions (e.g. 2 vs 7)? Thank you so much!! any help would be appreciated:) 回答1: Now I wanna have a button

Angular 7 - How can I share the token renewal Observable?

六月ゝ 毕业季﹏ 提交于 2019-12-11 04:37:25
问题 Before each request a HTTP interceptor checks if the access token is expired and if so, it first renews the token and then continues the request. The problem is on pages that have multiple requests. On those pages the interceptor tries to renew the token for each request. How can I share the token renewal request in this case? The method that is responsible for token renewal is this: renewToken() { let refreshToken = // get refresh token let accessToken = // get access token if (!refreshToken

Ionic 4 - determing if there is a forward-navigation available

本小妞迷上赌 提交于 2019-12-11 04:32:23
问题 I am currently upgrading an Ionic 1 app to Ionic 4. I need to know, if the current page has a "forwardView" available. Meaning I need to know if the user visited the page by using a "normal" forward link, or by using the "ion-back-button" (respectively the browser back button) In Ionic 1 we used the feature "forwardView()": http://ionicn.com/docs/api/service/$ionicHistory/ The code looked something like this: class ListViewContentController { static $inject = [ '$ionicHistory', ] constructor

Angular 6 to 7 upgrade resulting an error of missing startup module using lazy loading concept

↘锁芯ラ 提交于 2019-12-11 03:24:35
问题 UPDATE On my question I have added "BaseUrl": "./", to tsconfig.app.json and I got the following error: error TS5023: Unknown compiler option 'BaseUrl'. I think they mean in tsconfig.json and the baseUrl already added in. END of Update I updated my angular project to angular 7 using the following commands: npm install @angular/animations@latest @angular/common@latest @angular/compiler@latest @angular/core@latest @angular/forms@latest @angular/http@latest @angular/platform-browser@latest

How to have nested routerLink in Angular

扶醉桌前 提交于 2019-12-11 01:08:20
问题 I have a project in angular 7 I have router links with <a> tag, and I have nested <a> tags that both have routerLink property, the issue I am facing is , the inner <a> route doesn't work <a [routerLink]="[ './comp1']"> Comp1 <a [routerLink]="['./comp2']"> Navigate to comp2 (Nested) </a> </a> this is working if I separate it <div> <a [routerLink]="['./comp2']"> Navigate to comp2 (Not Nested) </a> </div> Also I tried the below code and still same <a [routerLink]="[ './comp1']"> Comp1 <a

Uncheck all boxes in form group in angular 7

泄露秘密 提交于 2019-12-11 00:20:02
问题 I need to have one check box in a form group that unchecks all checkboxes in the same form group as well as keep my validation. In my TS file i have: initForm() { this.financialSectionSix = this.formBuilder.group({ medicaidOrSssi: [false], snap: [false], freeOrReducedPriceLunch: [false], tanf: [false], wic: [false], noneOfTheAbove: [false] }); } In my HTML I have this: <div [hidden]="selectedSectionGroup.sectionSix" class="tab-pane fade show active" id="{{financialSectionEnum.SECTION_SIX}}"

How colSpan and row Span added to material table Header Angular 7?

笑着哭i 提交于 2019-12-11 00:15:24
问题 I'm trying to add rowSpan and colSpan in Angular material Table header . Can anyone help me to achieve it. Below is the Attached Header I want to get using material table 回答1: I have the sample task like you. I just easy to display none with second header. <ng-container matColumnDef="position"> <th mat-header-cell *matHeaderCellDef [ngStyle]="{'display': 'none'}"> No. </th> <td mat-cell *matCellDef="let element"> {{element.position}} </td> </ng-container> <!-- first stage header --> <ng

Angular 7 - Autoprefixer not working with CSS Grid

我的未来我决定 提交于 2019-12-10 23:39:03
问题 I am trying to get Angular7 working nicely with the Autoprefixer. I'm specifically looking to get support on IE11. I've removed the "not" from "IE 9 - 11" in the browserlist file. I've also added /* autoprefixer grid: autoplace / / autoprefixer grid: on */ To the top of my _grid.scss file. Problem is grid items are still not getting any prefixes. Flexbox seems to work fine but not CSS grid. Is there any configuration I've missed? 回答1: I had dependency issues. Ran npm audit fix and the issue

How to pipe / map an Observable in Angular

北慕城南 提交于 2019-12-10 17:23:38
问题 A nested object is showing up as [object Object] so I'm trying to cast it via pipe and map but I'm not getting any where. I've tried the models as classes and interfaces but no help. Can someone tell me what I'm doing wrong? Thanks. The function: getClients(customerId: number): Observable<Client[]> { let clientUrl = 'SOME_URL'; return this.http.get<Client[]>(clientUrl) .pipe(map(client: Client) => client.address as Address); } The models: import { Address } from './address.model'; export

How to create function name from json in Angular 7

一曲冷凌霜 提交于 2019-12-10 12:29:52
问题 I have to create dynamic button from json file. My JSON is as per below: { button : { title : "Submit", event : "FunctionName", color : "white".... }} My Component: @Component({ selector: 'my-app', template: ` <div> <h2>Function name is: {{FunctionName}}</h2> <input type="button" value="click here" (click)="this[FunctionName]()"> </div> <p>{{value}}</p> `, }) export class App { FunctionName:string; value: string; constructor() { this.FunctionName = button.FunctionName; } Button.FunctionName()