Exploring Vue Components Through the Global Scope

Is it feasible to retrieve an instantiated Vue.js component object from the global JavaScript scope with Vue.js, or are these objects encapsulated within Vue's internals?

For instance, when I have code defining a component like this:

Vue.component('component-name', {
   /*...*/
});

and then utilize that component in a tag:

<component-name>
    /* able to use templates with component object variables like {{foo}}
</component-name>

Behind the scenes, Vue's template rendering involves manipulating a JavaScript object. Is there a method for me to peek at the instantiated Vue component object programmatically? Something akin to:

var theComponent = getInstantiatedComponent('component-name');

While I'm familiar with the Vue.js Chrome debugger tool, I am specifically interested in whether there is a way to access these objects through code and what the syntax would be (as my understanding of Chrome Plugins is not advanced enough to explore the debugger plugin).

Answer №1

To access any Vue component globally registered, you can use the following syntax within another component:

this.$options.components.MyComponent

Alternatively, you can also access it like this:

this.$options.components['MyComponent']

If the desired component 'MyComponent' is not found within the current component, JavaScript will search up the prototype chain until it either locates the component or reaches the root Vue instance where all global components are registered.

Answer №2

The Vue Dev Tools are designed to locate root level instances of Vue by scanning the DOM.

To see how this scanning function works, visit this link. Essentially, the tool searches through page elements to identify those with the property __vue__, then applies certain criteria to establish if it is a root instance.

Once a root instance is identified, you can navigate its properties (such as $children) to discover components instances.

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