Most voted "angular" questions
Angular is a framework created by Google for the development of web applications. Use this tag for questions about syntax, errors, doubts, among others. Not specific to a version. For Angularjs-related issues (1.X) use the Angularjs tag.
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answer42
viewsMy regex is not working
I made a regular expression for mobile, on the site https://regex101.com/ is working, but in my project no, follows below the example My Pattern in the code: telefone: [null, [Validators.required,…
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answer52
viewsContent-Security-Policy + Angular 8
I am applying the following security policy in a project: <meta http-equiv="Content-Security-Policy" content="script-src 'self'; style-src 'self'; img-src 'self';" /> On the console, I get the…
angularasked 4 years, 8 months ago Alessandro 421 -
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answers441
viewsList an array within the array with Angular 4 ngFor
If anyone can help me. I have the following array [{resourceGroup: "grupo1", idsporgroup: Array(4)} {resourceGroup: "grupo2", idsporgroup: Array(2)} {resourceGroup: "grupo3", idsporgroup: Array(3)}…
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answer74
viewsin Angular the service.ts is also transposed and executed in the browser even though it does not have an html attached to it?
my doubt is about the angular security and business rules, I can leave some kind of business rule at the angle at least in service.ts because the service is running on Node and does not have an HTML…
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answer24
viewsconvert pdf files with pdfjs
I have a component to send files to the back end, but I need these files to be transformed into pdf. Thinking about it, I am using Pdfjs, passing the output element to it, but I noticed that it is…
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answers3288
viewserror message Cannot find a differ supporting Object '[Object Object]' of type 'Object'. Ngfor only
I’m getting this error message; This indicating that the error is here; <!-- INíCIO do CONTEÚDO --> <section class="content-header"> <h1> Todos os Restaurantes </h1>…
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answers428
viewsLoad log by id in Angular
This below is a brief explanation. By clicking the register on browser screen I can not load the records according to the ID. This below is a detailed application; View the gif file You can notice…
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answer89
viewsError while trying to load a mat-table with angular 6
Starting with Angular 6. When trying to create a table, based on an example I picked up, I started having the following problem. I added in my module main, these lines: import { MatInputModule,…
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answer225
viewsAngular 2 Error Httpresponse not found
I am trying to implement a login screen that accesses an api through a server, I need to pass the email and the user password to the api, and it returns me NULL in case of error or a number in case…
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answer80
viewsHow to set value in a formBuilder.array in Angular?
Using relative forms at angular 4, I have a problem defining a value for the array. How to set its value ? marketStructures: this.formBuilder.group({ include: this.formBuilder.group({ departments:…
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answer428
viewsSave return service variable in Angular
I have a service that returns me a user object with a user id: My object: export class Usuario{ email: string; password: string; } In my component I urge my object to get the return of service:…
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answer241
viewsDaughter routes at angular4
Hello, I’m encountering problems with my daughter routes. Just follow my lead: export const ROUTES: Routes = [ { path: '', redirectTo: 'Login', pathMatch: 'full' }, { path: 'Login', component: Login…
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answer204
viewsCreate background-image directive
I have an image directive, where if an image does not load I display a default image. Directive: import { Directive, Input, HostBinding } from '@angular/core'; @Directive({ selector: 'img[default]',…
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answers25
viewsHow to make a calculation when instantiating an object?
Hello, I would like to know how do for a property of an object receive a value from one against among other properties, for example objeto = { valor1: 10, valor2: 2, valor3: valor1 * valor2 ???? } I…
angularasked 4 years, 6 months ago wrafanunes 21 -
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answers21
viewsthis.arrayChecados.some is not a Function
Hello, I have a problem with typescript, I try to run a function to know if at least one of the checkbox contained in an ngFor has been selected, but the console shows me this error saying that…
angularasked 4 years, 6 months ago wrafanunes 21 -
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answer29
viewsValidation at Angular 9
I have a form, and in one of the inputs I need to do a validation so that when there are only blanks nothing happens. Example below: phone: [this.currentUser ? this.currentUser.user.phone : '',…
angularasked 4 years, 6 months ago Luiza Beraka 1 -
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answers146
viewsHow to catch the return of a service within a @Component with angular 6
I made this table(omit the TR and TD’s). <table mat-table [dataSource] = "dataSource" class="mat-elevation-z8"> If I create a failed array, it works. Below my component(commented lines, work,…
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answer1488
viewsReceive http client request status and login token at the angle
My backend api returns a token and a status, I need to save the token to localstorage and redirect the user to the welcome screen if the status returned from the api is 200. I tried something like:…
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answer56
viewsSearch by ngFor date range
I need help from someone, I looked around a lot more I couldn’t find. I have two Datastart and Datafim fields and I need to filter on ngFor to filter the selected dates. Example *ngFor="Let order of…
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answers70
viewsWith chaining a series of observables?
I have to get the answer from a Observable and use it from parameter to another Observable, I’m using the operator switchMap() for that, but I don’t know if it’s the right way. Ex.:…
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answers53
viewsUpload Angular/Laravel Project to Hostgator Server
I already searched enough and could not run the project on the server (Hostgator). I built the angular application where it is in a js folder (inside the public of the Laravel). I moved the…
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answers187
viewsHow to read an XML file after an Angular upload?
I am working with uploading XML in Angular 4. I would need to read the contents of this file and turn into a string. Could someone help me ? HTML <input id="uploadXml" type="file" #uploadXml…
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answers672
viewsBad request requsition http post angular
When performing an http post request, I am receiving: Object { headers: {...}, status: 400, statusText: "Bad Request", url: "https://hidden address", ok: false, name: "Httperrorresponse", message:…
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answers36
viewsIgnore folder in project construction for production
Hello, I’d like when to execute the ng build --prod angular ignores a folder and its contents inside the folder assets. I tried using the following configuration inside the.json angular, it even…
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answers21
viewsHow to apply resize to Primeng (p-table) Frozencolumns
I’m trying to use pResizableColumn in p-table, and it works, but in frozenColumns the behavior is very strange, I couldn’t find a way to work. I looked in several places and some even show a way to…
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answer79
viewsUse parent component function in angular child component
I’ve been trying to fire a function of a parent component into a child component and I can’t, someone’s done something like?
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answers49
viewsAngular 9 datatables
Good afternoon, I’m using the datatable of the link below: https://l-lin.github.io/angular-datatables/#/Welcome The only problem is to update the grid value after the update, follow image: Thank you…
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answers756
viewsHTTP POST request with x-www-form-urlencoded in Agular 6
I need to make an HTTP POST request with x-www-form-urelcoded at angle 6. I tried something like: pesquisaEmail(email): Observable<any>{ let headers = new HttpHeaders();…
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answer88
viewsChange label class to active after angular http request
I have a component of the material design bootstrap that after an http request it is filled in, the problem is that it does not change to the "active" class, having the result of the photo. <div…
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answer703
viewsDaughter Routes, Angular 5
I have a Component, where it receives only one parameter in its route, this way below: {path: ':modelo', component: BaseNumerica, This Commission, in turn, has 3 daughter routes, described as…
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answer112
viewsStarta button on the side and not under the mat-table
I have this html <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> <div> <table mat-table [dataSource] = "dataSource"…
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answers93
viewsHow to change the color of the mat-label in a mat-form-field
I need to change the color of my mat-label, but when I change by css using the "! Important", I lose the red color when my field is invalid.. how to change the color of my label without losing the…
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answers17
viewsProblems running window.onbeforeunload in Angular
I need to open an external site and when the user closes this window I will have to capture an element. The problem is that it is not going through the log inside onbeforeunload... My code in the…
angularasked 4 years, 2 months ago Cleriston Lincoln 49 -
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answer33
viewsHow to pause youtube-player via typescript?
I am doing an application in Angular (9.11) and need to know how long the user watched a video on youtube. I am using the angular youtube-player component. I monitor the state change in the…
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answers31
viewsSubmit to a hidden "form" component div to another component
I have two components, one (formNewPost) inside another (container-posts). I wonder if it is possible user Hostbinding and Hostlistener in this case. Follows code... container-posts.component.html…
angularasked 6 years, 8 months ago João Marcos Duarte 1 -
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answer49
viewsData from an Array (Angular)
I’m trying to use data from an Array to place on an object.. for example: lembreteSistemaList = LembreteSistema [] = []; lembreteSistema = LembreteSistema = new LembreteSistema(); recuperarLembrete…
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answers36
viewsValue of typescript variable inside component css
has some way at the angle of I use a value of a variable that is in ts of my component inside the css of that component, why I need to use a color in the css that is coming from the database... and…
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answer83
viewsRefresh with angular + IIS
I published an angular application on IIS and at first my application works normally, but when I refresh the page, I get a Not Found error. I looked at several websites and saw that it was necessary…
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answers132
viewsConvert JSON to Array
I have the following JSON: let result = {"0":4,"10":4,"30":6,"60":9,"90":12,"120":15,"150":18,"180":21} I need to convert to Array in the following format:…
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answers17
viewsHow do I access the mat-date-range-Picker’s isComplete() method in the template?
I’m trying to access the method isComplete() of mat-date-range-Picker in my template: You should select the range date But I’m getting this mistake: error TS2339: Property 'isComplete' does not…
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answers224
viewsHttp Failure Response for (url): 0 Unknown Error?
I have a local code. The front (Angular 8) sends a POST request to the back (.net). On another computer it works normally. But in my current computer does not work. Returns: Http failure response…
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answers65
viewsAngular 6 - Portal
I need to create a portal style application in Angular 6. This application should be able to include other applications. Explaining better: I have 3 applications: APP1 APP2 PORTAL Within the Portal…
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answer103
viewsWhen I give a post in the form I get this error: Typeerror: _co.postCreateTypeFields is not a Function
This is my html: <div class="container"> <form [formGroup]="form" (ngSubmit)="postCreateTypeFields()" style="width:400px; margin: 0 auto;"> <h1>Types Fields</h1> <div…
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answers29
viewsShare image dynamically on social networks Angular 11
I am using the plugin/framework Addthis to share on social networks, and I want to change the image dynamically based on different content, I came to make the implementation of updateTag, but when I…
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answer25
viewsIssue event after close ngx-toastr Angular
I am using the following code to generate the Poup-up toastr showSuccess() { this.toastr.success('You are awesome!', 'Success!', { onHidden: () => { console.log('hidden') }, onCloseClick:…
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answer1137
viewsEdit table at Angular 6
I have had some problems, because I don’t know Angular 6 well. I have this table: <div class="container-fluid"> <div class="row"> <div class="col-md-12"> <table class="table…
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answers47
viewsIs using Promise wrong (deprecated) nowadays?
Well, I work with angular nowadays and I always wonder if it is wrong to use Promises or not, example. I have a code that needs to be async. First function must validate the access permission, after…
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answer296
viewsRoutes at Angular 2+
My application starts with the Logincomponent component: bootstrap: [LoginComponent] In my login routing module I set the following routes: const loginRoutes: Routes = [ {path: 'dash', component:…
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answer352
viewsError in mat-select when trying to choose an item
Error: ngModel cannot be used to Register form Controls with a Parent formGroup Directive. Try using formGroup’s Partner Directive "formControlName" Instead. Example: My HTML <div…
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answer22
viewsComponents and Services
I am developing an application and came across the following problem: I am working with an api that manages a website and have some endpoints like: banners, testimonials, user, images etc, most…