A few years ago I wrote a post about how to do loading spinners the Angular way. At the time I was inspired by the fact that I kept seeing people struggle with the same problem.
When you have a complex application with tons of components and all you want to do is toggle a loading graphic in one component half way across your app, what's the best way to do it? I've seen some of the craziest solutions for solving this problem. The most common issue is trying to toggle a loading spinner at just the right time, oftentimes from within a service that isn't directly related to a component.
Talk about overkill. Often we have a simple scenario where we click a button to begin some operation and showing a loading graphic is easy and straightforward.
In most cases this is simple and straightforward, but in large complex applications there are a lot of interactions going on. What if you want to hide every loading spinner on the page in the event of an error so as to prevent hanging loading graphics?
I created this library so I could stop having to think through those complex scenarios so often. Of course we're going to need a component to house our loading spinner so our users can just quickly place the component down and forget about it.
We want this component to perform a bit of behind the scenes magic in order to make the user's life easier. We'd like the component to register itself with a service that can track and maintain our spinners. We'll go into more detail on that service further down the page, but let's just keep that future service in mind when we craft the inputs for our component. What we have so far is very basic.
You can see our template expects us to supply a path to a loadingImage so lets go ahead and add that in as our first input. By declaring our loadingImage property with the Input decorator we make it possible for users of our component to pass in a value for it. So far we've done nothing special. Don't worry, we'll get there.
We know that we are going to need to hide and show this directive so let's go ahead and add an input for that. They could just as easily pass in a variable from the parent component so they can modify that variable at will to hide or show the spinner. Before we move on we should figure out how to make our loadingImage required because without it our component is useless as it is now. There is no built-in mechanism to declare an input property as required. This is probably because implementing it manually is pretty easy.
There are different component lifecycle hooks we can implement and tap into. One of which is OnInit. The OnInit function is called after inputs have been initialized on components that implement the OnInit interface. After declaring that our component implements the OnInit interface we then have to actually implement it by creating an ngOnInit method on our class. In this method we can check for values of our input properties and throw an error if a required property is not populated.
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You might be wondering why we didn't just do this check in the class constructor. The reason is because when the constructor runs the input properties have not yet been assigned.
OnInit is the first place in the component lifecycle that we can expect those values to be present. At this stage it's time to revisit a feature from the old Angular 1.Here, is a list of amazing Angular 4 loading spinner exampleschoose one for your next Angular application. So, this article will help you to choose a best Angular 4 loading spinner for your application.
Therefore, I thought let me collect some of the good examples of Angular 4 loading spinner and provide you the details, that will help you.
In between the time of requests, we can show the loading spinner to the users. One is default option and another is custom template. Here, few steps of tutorial will help you create a custom loader as a service and can use it throughout the application by just importing that service in your component. This example is based on Kendo UIthat will help you to show an overlay on the window while a remote request is made. I hope, you liked this list of best Angular 4 loading spinner examples. As I mentioned, the choice of loading spinner will automatically change the user-friendliness of your application.
So, review all the listed examples and choose the best suitable example for your application. Mohit Tanwani is an enthusiast Techie, a blogger, and IT geek. He has been crazily involved in the industry for more than 6 years now. By Mohit Tanwani Last updated Mar 4, Share Facebook Twitter Linkedin Email.
Angular 4 Loading Spinner Angular Loader. Mohit Tanwani. You might also like More from author. Prev Next. Notify of.In the real-time example, when we send a network request to the server, while we get a response, we need to display the spinner or any loader to the user.
It is the best practice for user experience. So in this example, I will show you how you can use loader or spinner while getting the response from the server.
At the time of this data, third-party libraries do not support the RxJS 6. We need to fill the gap between Angular 6 and third-party libraries. That is it. Type the following command to install the angular epic spinner library.
Okay, now we just need to use this component in any html file we want. Otherwise, it will not render it. We see nothing because we have set the display property to false. So, finally, we have displayed the spinner inside our Angular application.
Now, start the JSON server using the following command. Now that we have our server running, we can feed the data to our Angular application. The angular framework is bundled with HttpClient library by default. It is an interface that contains the property with its datatype we expect from the server. Create a service file by typing the following command.
It will fetch the data from the json server. Now, save the file, and you can see the data on the home page of our Angular Application. Otherwise, we can not access the scope, and we fail to fetch the data. Now, you can see till 2 seconds, we see the loading spinner, and after that, we can see our data. Thanks for taking. Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
If nothing happens, download GitHub Desktop and try again.Add loading spinner for buttons in Angular
If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. Angular directive ajax loading indicator. This directive uses urish angular-spinner as the loading indicator. See plunker demo. Insert angular-spinner 's us-spinner directive anywhere in your html file to be shown when there is pending ajax request and will be hidden upon completion of all ajax requests. It can be useful if you want to hide some elements while your application is fetching data from the backend.
You can still use us-spinner directly un-affected by ajax request using the us-spinner-standalone directive. Read angular-spinner docs on how to customize the spinner and refer to spin. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
Angular directive for ajax loading indicator. It detects any ajax request and shows the spinner. HTML Branch: master. Find file. Sign in Sign up.Learn how to create a beautiful progress spinner in Angular using material design. We can create a Progress spinner in Angular using material design component mat-progress-spinner or mat-spinner.
Progress Spinner displays the progress of an ongoing process by animating the indicator along a fixed invisible circular track in a clockwise direction. This tutorial contains step by step tutorial to implement progress spinner in angular by following material design specifications. We can import progress spinner module in our component ts file or app. After importing progress spinner module.
We will use progress spinner with determinate mode, when we can detect the process completion rate. Process completion determined by value property of mat-progress-spinner. We should bind the value property to the process completion rate to animate the progress spinner. Ones ngIf condition i.
Progress spinner will be removed from the DOM. You might be wondering why we have two elements mat-spinner and mat-progress-spinner. And in mat-progress-spinner element mode property is required.
The default color is themes primary color. In case if you want to give custom color to mat-spinnernot color from prebiult-themes, you can override the theme CSS colors by changing circle element stroke property. Or you can give a class name to the mat-spinner element, add the necessary CSS properties and use it wherever required.
To change the stroke width of mat-progress-spinner we can use strokeWidth property. To center the progress spinner middle of the webpage. Using ng generate command, we will create a component called mat-spinner-overlay. And now in mat-spinner-overlay. And finally add the necessary CSS mat-spinner-overlay. So to display overlay spinner use app-mat-spinner-overlay element with overlay propery true.Since spinner is used throughout the application, so its better to define it once in index.
I am also using BehaviorSubject object in service, which is way more awesome and better then observable in many cases, Behavior Subject is a special type of observable so you can subscribe to messages like any other observable. In plain words the variable controlling enabling and disabling the spinner in index.
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Step 1 : Copy spinner css IN app. Like this: Like Loading Hi, Is there any way i can contact you? Could you please share your mail id? Thanks Like Like. Nice article.
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If nothing happens, download the GitHub extension for Visual Studio and try again. Link to ng4-loading-spinner.
How to do loading spinners, the Angular 2+ way.
You can also configure your own threshold to show spinner only for more expensive processes! Import Ng4LoadingSpinnerService to the component where you want to show the spinner.
Default is ms. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. Angular 4 custom async loading spinner.
Jul 28, Updates for Angular 7. Set theme jekyll-theme-architect. Added tsickle as a dependency as its no longer included by default wi….