Angular2 file download

It can be used to get the first element or the directive matching the selector from the view DOM. The ViewChild also provides an instance of other components or directive in a parent component so the parent component can access the methods of that component or directive. This placeholder tag is replaced with the original content as the template is parsed. The ng-content creates components that can be configured depending on the needs of the user. Decorators are functions that are invoked with a prefixed symbol and immediately succeeded by a class, parameter, method or property.

The decorator function is supplied data about the class, parameter or method, and the decorator function returns something in its place or manipulates its target in some way. Usually, the "something" a decorator returns is the same thing that was passed in, but it has been augmented in some way. Decorators are designed for a future version of JavaScript, but the Angular team wanted to use them, and they have been included in TypeScript.

Thank you. Recent Articles What is notepad in computer? What is responsive web design and why is it important? Angular 2 Interview Questions 1 What is Angular 2?

How is it used? What is Angular2? Some new features were added in Angular 2 which includes: Universal server rendering- It is the library which is used to make building universal apps a smooth experience. It is an important feature of Angular 2. A mobile toolkit- It provides all the mobile toolkit and techniques to build high-performance mobile applications. The web applications which are developed using the mobile toolkit can be loaded on any device with or without internet connection which is a great advantage.

A command line interface- it can generate components, routes, services, and pipes with the help of commands. Data binding- data binding has been improved in Angular 2. So, whatever DOM element property you need to bind, you just wrap it in square brackets. Modern- Angular 2 has been targeted as modern browsers in which various hacks that make angular harder to develop have been removed. Lazy loading can be done only in four steps:— Update your route file Install angular-router-loader and add the loader to your webpack configuration file.

Define the lazy routes Import the routes to the module. The Angular 2 comprises of the following key components: Module — This is used to break the application into the logical pieces of the program code and each piece of code or module is designed to perform a single and unique task.

Component — This is used to bring the modules together. Metadata — This is used to add more data to an Angular JS application. Service — This component is used to develop the components, which can be used to share in the entire application. Below are few component specific hooks in Angular2. The hidden property in Angular 2 is a special case. The property is more powerful and is used to bind any property of the elements. It is considered the closest cousin of ngshow and nghide. So, some of the advantages of Angular 2 are:- Angular 2 Angular1 Angular 2 is a mobile-oriented framework Whereas Angular1 was not developed with mobile base in mind.

Angular 2 is a versatile framework, i. Nowadays, the controllers are replaced by components and Angular 2 is completely component based. Whereas Angular1 was based on controllers whose scope is now over. The differences between observable and promises are: Observable is a more powerful way of handling HTTP asynchronous requests. Whereas, A promise handles a single event when an asynchronous operation completes or fails. An observable is like a stream which allows passing zero or more events where the callback is called for each event.

Observable works with multiple values for a particular time. Whereas, Promises works with and even returns a single value at a time. Observables can be canceled. Whereas, Promises cannot be canceled. Observable supports map, filter, reduce and similar operators.

Whereas, Promises cannot be retried. A promise should have access to the original function that returned the promise in order to have a retry capability. They are: In Angular 2, a component is a directive with a view whereas a directive is a decorator with no view. Components are the specific type of directive that allows us to utilize web component functionality throughout our application. Whereas, Directive is the mechanism by which we attach behavior to elements.

A component is used to break up the application into smaller components. Whereas, Directive is used to design the re-usable components. Components can be used to define pipes. Whereas, We cannot define pipes using directives. Components can be present per DOM element. Whereas, Directive is used to add behavior to an existing DOM element.

Here are some of the differences between ActivatedRoute and RouterState with reference to Angular ActivatedRoute consists of the information about a route associated with a component loaded in an outlet. Whereas, RouterState represents the state in which the writer actually is. We need ActivatedRouteSnapchat to traverse all the activated routes. For e. I could emit basePath and put the values directly, but it's still an overhead Don't get me wrong, I really like this approach and I'm really thankful for the effort to get such a clean solution.

I'm just sharing my experience. I followed the steps mentioned in this gist. But when I add the AppConfig in the constructor, I get the following error in console. I added the AppConfig in NgModule providers section in the following order. I see that the load method is successfully executed. I see the config data while debugging.

But I m not able to inject the AppConfig class into my service. Any ideas how I can resolve this issue? The issue was because of a silly error. I gave the import in app. I have the same problem as Carpediemy. When doing tests I get Cannot read propery 'SomeProperty' of null. Do we need to call the load function manually somehow or how to establish the config in testing? Carpediemy Chuvisco88 ever find a solution?

We had to just manually call config. How did you manually call config. I am getting an error "Cannot read property load of undefined". I have the same problem as anyones and the geekrumper solution does not work for me. Thanks in advance. I'm stuck with this error, in the load method, it can't reach the file env. Chuvisco88 , scottseeker , Priyesha were you able to find a solution for app initializer to work in unit tests? PooperPig : I am getting the same error and ddramone solution didnot work for me.

Is the issue solved. Did you get answer to this. So I did this to improve loading time. Hi, thank for great tutorial! If I use config deeper then one level, getConfig key returns undefined. Chuvisco88 , scottseeker , Priyesha Carpediemy , where any of you able to find a solution for this problem?

Property 'get' does not exist on type 'AppConfig'. I am getting an error "Cannot read property load of null". Someone92 You should use this. There is a much simpler way if you're just looking to set global environment properties host address for example :. Thank you for your help. Also your links is horribly outdated, there is official support on GitHub for Build-Time Environments.

I have the same issue with unit test. Did someone find the solution? I am able to get the external json file in my unit test by mocking the AppConfig. You can also mock other functions whichever is required. Chuvisco88 , scottseeker , Carpediemy , ridj87 I am able to run my unit test with this.

Branches Tags. Could not load branches. Could not load tags. Latest commit. Git stats commits. Failed to load latest commit information. Sep 3, Sep 7, Updated: starter. Please fix it. The headers are created and not used. Not helpful. Show 11 more comments. Alex Dzeiko Alex Dzeiko 11 11 silver badges 12 12 bronze badges. This doesn't even require any new windows opening and stuff like that. Massimiliano Kraus 3, 5 5 gold badges 22 22 silver badges 44 44 bronze badges.

GingerBeer GingerBeer 8 8 silver badges 11 11 bronze badges. You're right, but then how can you manage server errors within the single-page application? If you have an access token you need to provide this doesn't work — chris This is plain and simple.

But if you wanna do some authentication, then there is a possibility of having something like a one time token. So, instead of having it like this, you can have the url as: example. Of course its not a simple scenario and works in all the situations, but can be a solution in situation where, you have access to the database before returning the report as a stream.. Get the download url from the server. So the server can prepare the url with onetime security token.

FileBytes, AT. Hope this helps someone :. It will be better if you try to call the new method inside you subscribe this. Volodymyr Khmil Volodymyr Khmil 11 11 silver badges 11 11 bronze badges. The following example is to download a journal as PDF. Get, url: url, responseType: ResponseContentType. Casper Nybroe Casper Nybroe 1 1 gold badge 16 16 silver badges 37 37 bronze badges. Ismail H Ismail H 3, 1 1 gold badge 28 28 silver badges 53 53 bronze badges.

Change this line according to request headers you need. Blob; this. Baatar Baatar 2 2 silver badges 9 9 bronze badges. Tushar Walzade Tushar Walzade 3, 4 4 gold badges 28 28 silver badges 49 49 bronze badges. FileName : "TeamsiteExport. Add "Content-Disposition", contentDisposition. ToString ; return File excelOutput. David Zwart David Zwart 4 4 silver badges 19 19 bronze badges.

I got a solution for downloading from angular 2 without getting corrupt, using spring mvc and angular 2 1st- my return type is :- ResponseEntity from java end. Mel 5, 10 10 gold badges 37 37 silver badges 40 40 bronze badges.

Gabriel Sezefredo Gabriel Sezefredo 4 4 bronze badges. If I use window. If you save file with randomized name, you can permit security for download url. By removing security from download url, improvement in the donwload speed will be achieved. First, how to call the code from your component file this. Dibyodyuti Mondal Dibyodyuti Mondal 41 2 2 bronze badges. Basil Basil 1, 12 12 silver badges 19 19 bronze badges. I tried this and the file just seems to open in browser..

Simply put the url as href as below. Does it work? I get error Thanks can u pls share how does ur url looks like? Id it file protocol or http or something else? It's File protocol.

B--rian 4, 9 9 gold badges 29 29 silver badges 70 70 bronze badges. Max Max 11 3 3 bronze badges. Welcome to SO!