Why AngularJS routing is not working?
1 Answer. The problem is the default hash-prefix used for $location hash-bang URLs is (‘! ‘) that’s why there are additional unwanted characters in your URL. If you actually want to have no hash-prefix and make your example work then you can remove default hash-prefix (the ‘!’
What resolve property does in route configuration?
Resolve is a property on the routing configuration, and each property on resolve can be an injectable function (meaning it can ask for service dependencies). The function should return a promise.
What is resolve in angular routing?
Resolvelink A data provider class can be used with the router to resolve data during navigation. The interface defines a resolve() method that is invoked when the navigation starts. The router waits for the data to be resolved before the route is finally activated.
How do I use routing in AngularJS?
Apply ng-app directive. Apply ng-view directive to or other elements where you want to inject another child view. AngularJS routing module uses ng-view directive to inject another child view where it is defined. Therefore, Angular will inject login.
Who is known as father of Angular JS?
AngularJS was originally developed in 2009 by Miško Hevery at Brat Tech LLC as the software behind an online JSON storage service, that would have been priced by the megabyte, for easy-to-make applications for the enterprise.
What is routing in AngularJS with an example?
In AngularJS, routing is what allows you to create Single Page Applications. AngularJS routes enable you to create different URLs for different content in your application. AngularJS routes allow one to show multiple contents depending on which route is chosen. A route is specified in the URL after the # sign.
What is resolve Guard in angular?
Resolve guard is used in the scenario where before navigating to any route we want to ensure whether there is data available or not. If there is no data then it has no meaning to navigate there. It means we have to resolve data before navigating to that route. Here comes the role of Angular Resolve guard.
How do you use resolve in routing?
Before we start implementing a route resolver, let’s first see how the Resolve interface looks like. If you want to create a Route Resolver, you have to create a new class that will implement the above interface. This interface provides us with a resolve function, which gets you two parameters in case you need them.
Can you activate guard?
What is CanActivate Guard. The Angular CanActivate guard decides, if a route can be activated ( or component gets rendered). We use this guard, when we want to check on some condition, before activating the component or showing it to the user. This allows us to cancel the navigation.
How do you use runGuardsAndResolvers?
Given a route configuration, we can set a property runGuardsAndResolvers and set it accordingly to one of those two options….Examples of URLs satisfying this condition and hence execute the guards & resolvers would be the following:
- /home/1 => /home/2.
- /home/1 => /home/1;param1=38.
- /home/1;param1=38 => /home/1;param1=20.
What is the Routermodule forRoot method used for?
The forRoot() method creates an NgModule that contains all the directives, the given routes, and the Router service itself. The forChild() method creates an NgModule that contains all the directives and the given routes, but does not include the Router service.
Can you explain the difference between ActivatedRoute and RouterState?
Introducing RouterState! RouterState and ActivatedRoute are similar to their snapshot counterparts except that they expose all the values as observables, which are great for dealing with values changing over time. Any component instantiated by the router can inject its ActivatedRoute.
What is difference between forRoot and forChild?
forRoot creates a module that contains all the directives, the given routes, and the router service itself. forChild creates a module that contains all the directives and the given routes, but does not include the router service.
What is lazy loading in angular?
How do I know if angular lazy loading is working?
If you want to check how lazy loading works and how lazy loading routing flow, then Augury is the best tool we have. Click on ctrl+F12 to enable the debugger and click on the Augury tab. Click on the router tree. Here, it will show the route flow of our modules.
How do you implement lazy loading?
Next, to lazy load a simple img element, all you need to do in your markup is:
- you add the class lazy to the element.
- the value of src is a placeholder image.
- the path to the image you want to lazy load is inside the data-src attribute.
What is lazy loading example?
Examples of Lazy Loading As the name suggests, Infinite Scroll continuously loads content as the user scrolls down the page. As the user scrolls down the page, placeholder images are replaced with thumbnails. After a certain number of images are displayed, a button allows the user to load additional images.
Why is lazy loading used?
The benefits of lazy loading include: Reduces initial load time – Lazy loading a webpage reduces page weight, allowing for a quicker page load time. Bandwidth conservation – Lazy loading conserves bandwidth by delivering content to users only if it’s requested.
Does Lazy Load improve page speed?
You even risk turning off repeat users and customers from converting again. That’s where lazy loading comes in. Lazy loading is one of a number of crucial page speed optimizations you can make to increase performance and give yourself the best chance of converting new users.
When should you not use lazy loading?
When you SHOULDN’T use lazy load:
- You have images above the fold. (it delays your header/banner load)
- You have a store.
- Doing it only to fool pagespeed scores.
- You’ve got a CDN.
- Have only a few images on each page.
- You have a fast-loading website and strong server.
What is lazy loading and why is it used for?
Lazy loading (also known as asynchronous loading) is a design pattern commonly used in computer programming and mostly in web design and development to defer initialization of an object until the point at which it is needed. It can contribute to efficiency in the program’s operation if properly and appropriately used.
Why is lazy vs eager initialization preferred?
Lazy initialization is technique were we restrict the object creation until its created by application code. This saves the memory from redundant objects which some time may be very big/heavy. In other way eager initialization creates the object in advance and just after starting the application or module.
What is lazy loading in hibernate?
Hibernate now can “lazy-load” the children, which means that it does not actually load all the children when loading the parent. Instead, it loads them when requested to do so. You can either request this explicitly or, and this is far more common, hibernate will load them automatically when you try to access a child.
What is the difference between load () and get ()?
In hibernate, get() and load() are two methods which is used to fetch data for the given identifier. They both belong to Hibernate session class. Get() method return null, If no row is available in the session cache or the database for the given identifier whereas load() method throws object not found exception.
How can we avoid lazy loading exception in hibernate?
How to NOT fix the LazyInitializationException
- Don’t use FetchType. EAGER.
- Avoid the Open Session in View anti-pattern.
- Don’t use hibernate.
- Initializing associations with a LEFT JOIN FETCH clause.
- Use a @NamedEntityGraph to initialize an association.
- EntityGraph to initialize an association.
- Using a DTO projection.
How use lazy FetchType in hibernate?
The FetchType. LAZY tells Hibernate to only fetch the related entities from the database when you use the relationship. This is a good idea in general because there’s no reason to select entities you don’t need for your uses case. You can see an example of a lazily fetched relationship in the following code snippets.
What is the difference between fetch type eager and lazy?
Lazy only happens on first use (if the provider takes the hint), whereas with eager things (may) get pre-fetched. The main difference between the two types of fetching is a moment when data gets loaded into a memory.