Vue.js - The Progressive JavaScript Framework. API Global Config. Vue.config is an object containing Vue’s global configurations. You can modify its properties listed below before bootstrapping your application. P0302 is a relatively common Saturn Vue trouble code. It stands for: P0302: Misfire Detected Cylinder 2. P0302 is certainly a cause for concern, and can be a threat to the drivability the Saturn Vue. Vue Injector is an open-source dependency injection library for Vue.js created by a team of front-end developers at SCAND. It includes a number of instances that can be used for the implementation of the dependency injection pattern. Also, it includes the following:Dependency injection for components Construction of the injected services. Low prices on Fuel Injector Connector for your Saturn Vue at Advance Auto Parts. Find aftermarket and OEM parts online or at a local store near you.
Dependency injection for components
Construction of the injected services
Accessibility of Vue application from service
Utilization of decorators for convenient operation
The main benefits of Vue Injector:
Provides developers with the ability to utilize dependency injection an important design pattern that is not included in Vue.js framework by default
Provides convenient mechanism of data transfer
Allows creating both a service and a service factory
Allows requesting the service instead of creating it, providing the ability to depend on interfaces rather than concrete types
Provides the ability to implement event bus
Promotes the applications flexibility, efficiency, and robustness
Allows creating easily testable and maintainable applications
This page assumes you've already read the Components Basics. Read that first if you are new to components.
Usually, when we need to pass data from the parent to child component, we use props. Imagine the structure where you have some deeply nested components and you only need something from the parent component in the deep nested child. In this case, you still need to pass the prop down the whole component chain which might be annoying.
For such cases, we can use the provide and inject pair. Parent components can serve as dependency provider for all its children, regardless how deep the component hierarchy is. This feature works on two parts: parent component has a provide option to provide data and child component has an inject option to start using this data.
For example, if we have a hierarchy like this:
If we want to pass the length of todo-items directly to TodoListStatistics, we would pass the prop down the hierarchy: TodoList -> TodoListFooter -> TodoListStatistics. With provide/inject approach, we can do this directly:
However, this won't work if we try to provide some component instance property here:
To access component instance properties, we need to convert provide to be a function returning an object
This allows us to more safely keep developing that component, without fear that we might change/remove something that a child component is relying on. The interface between these components remains clearly defined, just as with props.
In fact, you can think of dependency injection as sort of “long-range props”, except:
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- parent components don’t need to know which descendants use the properties it provides
- child components don’t need to know where injected properties are coming from
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# Working with reactivity
In the example above, if we change the list of todos, this change won't be reflected in the injected todoLength property. This is because provide/inject bindings are not reactive by default. We can change this behavior by passing a ref property or reactive object to provide. In our case, if we wanted to react to changes in the ancestor component, we would need to assign a Composition API computed property to our provided todoLength:
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In this, any change to todos.length will be reflected correctly in the components, where todoLength is injected. Read more about computed in the Computed and Watch section and reactive provide/inject in the Composition API section.