⚠️ As a rule of thumb, keep in mind that when you end up duplicating your child components' props inside their parent component, you should start using slots at that point. Organize Your Vuex Store Properly. Usually, new Vue.js developers start to learn about Vuex because they stumbled upon on of these two issues. Vue 3 took the chance and unified both APIs. The less powerful old slots are gone and the old scoped slots are now just called 'slots'. Passing on all slots in Vue 3 is similar (but not exactly equivalent) to passing on scoped slots in Vue 2, so here is the W component from the previous section, adjusted to Vue 3.

Vue.js simplified: components, props, and slots December 10, 2020 8 min read 2425 In this article, we will be using Vue.js, Vue CLI and Bootstrap CSS.

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While this tutorial has content that we believe is of great benefit to our community, we have not yet tested or edited it to ensure you have an error-free learning experience. It's on our list, and we're working on it! You can help us out by using the 'report an issue' button at the bottom of the tutorial.

While basic component slots are all fine and dandy, sometimes you want the template inside the slot to be able to access data from the child component hosting the slot content. For example, if you’re trying to allow custom templates in a container while still retaining access to those containers’ data properties, you’ll want to use a scoped slot.

Introduction

Scoped slots are a new feature introduced in Vue 2.1.0. They allow you to pass properties from your child components into a scoped slot, and access them from the parent. Sort of like reverse property passing.

The first step to creating a scoped component slot is to pass properties into a default or named slot from your child component, like so:

Then, to use those properties inside a parent component’s slot content, create a template element tied to the slot. Add a scope attribute to the template element and set it to the name that you wish to access the scope properties from. This essentially creates a local variable for anything inside that template, allowing you to access it as if it was in the parent’s scope.

(For example, scope=“myScope”, properties passed into the <slot> will be accessible as {{myScope.myProperty}} while scope=“yourScope” will be accessed as {{yourScope.myProperty}}.)

Note: The template element does not get added to the DOM. It’s simply a wrapper.

If you’re using Vue 2.5 or above, use the slot-scope attribute instead of scope. Also you can skip the template elements.

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While this tutorial has content that we believe is of great benefit to our community, we have not yet tested or edited it to ensure you have an error-free learning experience. It's on our list, and we're working on it! You can help us out by using the 'report an issue' button at the bottom of the tutorial.

Oftentimes you will need to allow your parent Vue components to embed arbitrary content inside of child components. (Angular devs, you know this as transclusion or content projection.) Vue provides an easy way to do this via slots.

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Basic Usage

To allow a parent component to pass DOM elements into a child component, provide a <slot></slot> element inside the child component. You can then populate the elements in that slot with <child-component><p>MyParagraph</p></child-component>.

Note: If there is no <slot></slot> element in the child’s template, any content from the parent will be silently discarded.

Fallback Content

If the parent does not inject any content into the child’s slot, the child will render any elements inside its <slot></slot> tag, like so:

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Named Slots

Having one slot to inject content into is nice and all, but oftentimes it would be preferable to be able to inject various types of content at different locations in the child component. Say you’re making a burger component. You want the top and bottom buns to be predictably at the top and bottom of the burger, (don’t you?) but also want to be able spread things on the bun halves.

Vue allows us to do this by way of named slots. Named slots are simply slots with a name attribute <slot name='slotName'></slot> to allow for namespaced content injection.

Obviously I don’t have a clue as to how to make burgers, but that should at least serve as an understandable guide to Vue slots. Enjoy!