You’re browsing the documentation for v2.x and earlier. For v3.x, click here.
Practical use of Components and Mixins in Vue JS; 2.6.0+ If you use Vue version above 2.6.0, Vue introduces new unified slot api, which is v-slot. It replaces the slot and slot-scope attributes, which are deprecated, but have not been removed and are still documented here. You can refer to deprecated API here. # Slots (Default).
This page assumes you’ve already read the Components Basics. Read that first if you are new to components.
- 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.
- This page assumes you've already read the Components Basics.Read that first if you are new to components. # Slot Content Vue implements a content distribution API inspired by the Web Components spec draft (opens new window), using the slot element to serve as distribution outlets for content.
In 2.6.0, we introduced a new unified syntax (the
v-slot
directive) for named and scoped slots. It replaces the slot
and slot-scope
attributes, which are now deprecated, but have not been removed and are still documented here. The rationale for introducing the new syntax is described in this RFC.Slot Content
Vue implements a content distribution API inspired by the Web Components spec draft, using the
<slot>
element to serve as distribution outlets for content.This allows you to compose components like this:
Then in the template for
<navigation-link>
, you might have:When the component renders,
<slot></slot>
will be replaced by “Your Profile”. Slots can contain any template code, including HTML:Or even other components:
If
<navigation-link>
‘s template did not contain a <slot>
element, any content provided between its opening and closing tag would be discarded.Compilation Scope
When you want to use data inside a slot, such as in:
That slot has access to the same instance properties (i.e. the same “scope”) as the rest of the template. The slot does not have access to
<navigation-link>
‘s scope. For example, trying to access url
would not work:As a rule, remember that:
Everything in the parent template is compiled in parent scope; everything in the child template is compiled in the child scope.
Fallback Content
There are cases when it’s useful to specify fallback (i.e. default) content for a slot, to be rendered only when no content is provided. For example, in a
<submit-button>
component:We might want the text “Submit” to be rendered inside the
<button>
most of the time. To make “Submit” the fallback content, we can place it in between the <slot>
tags:Now when we use
<submit-button>
in a parent component, providing no content for the slot:will render the fallback content, “Submit”:
But if we provide content:
Then the provided content will be rendered instead:
Named Slots
Updated in 2.6.0+. See here for the deprecated syntax using the
slot
attribute.There are times when it’s useful to have multiple slots. For example, in a
<base-layout>
component with the following template:For these cases, the
<slot>
element has a special attribute, name
, which can be used to define additional slots:A
<slot>
outlet without name
implicitly has the name “default”.To provide content to named slots, we can use the
v-slot
directive on a <template>
, providing the name of the slot as v-slot
‘s argument:Now everything inside the
<template>
elements will be passed to the corresponding slots. Any content not wrapped in a <template>
using v-slot
is assumed to be for the default slot.However, you can still wrap default slot content in a
<template>
if you wish to be explicit:Either way, the rendered HTML will be:
Note that
v-slot
can only be added to a <template>
(with one exception), unlike the deprecated slot
attribute.Scoped Slots
Updated in 2.6.0+. See here for the deprecated syntax using the
slot-scope
attribute.Sometimes, it’s useful for slot content to have access to data only available in the child component. For example, imagine a
<current-user>
component with the following template:Template Slot Vue Js Download
We might want to replace this fallback content to display the user’s first name, instead of last, like this:
Vue Js Template Slot
That won’t work, however, because only the
<current-user>
component has access to the user
and the content we’re providing is rendered in the parent.To make
user
available to the slot content in the parent, we can bind user
as an attribute to the <slot>
element:Attributes bound to a
<slot>
element are called slot props. Now, in the parent scope, we can use v-slot
with a value to define a name for the slot props we’ve been provided:In this example, we’ve chosen to name the object containing all our slot props
slotProps
, but you can use any name you like.Abbreviated Syntax for Lone Default Slots
In cases like above, when only the default slot is provided content, the component’s tags can be used as the slot’s template. This allows us to use
v-slot
directly on the component:This can be shortened even further. Just as non-specified content is assumed to be for the default slot,
v-slot
without an argument is assumed to refer to the default slot:Note that the abbreviated syntax for default slot cannot be mixed with named slots, as it would lead to scope ambiguity:
Whenever there are multiple slots, use the full
<template>
based syntax for all slots:Destructuring Slot Props
Internally, scoped slots work by wrapping your slot content in a function passed a single argument:
That means the value of
v-slot
can actually accept any valid JavaScript expression that can appear in the argument position of a function definition. So in supported environments (single-file components or modern browsers), you can also use ES2015 destructuring to pull out specific slot props, like so:This can make the template much cleaner, especially when the slot provides many props. It also opens other possibilities, such as renaming props, e.g.
user
to person
:You can even define fallbacks, to be used in case a slot prop is undefined:
Dynamic Slot Names
New in 2.6.0+
Dynamic directive arguments also work on
v-slot
, allowing the definition of dynamic slot names:Named Slots Shorthand
New in 2.6.0+
Template Slot Vue Json
Similar to
v-on
and v-bind
, v-slot
also has a shorthand, replacing everything before the argument (v-slot:
) with the special symbol #
. For example, v-slot:header
can be rewritten as #header
:However, just as with other directives, the shorthand is only available when an argument is provided. That means the following syntax is invalid:
Instead, you must always specify the name of the slot if you wish to use the shorthand:
Other Examples
Slot props allow us to turn slots into reusable templates that can render different content based on input props. This is most useful when you are designing a reusable component that encapsulates data logic while allowing the consuming parent component to customize part of its layout.
For example, we are implementing a
<todo-list>
component that contains the layout and filtering logic for a list:Instead of hard-coding the content for each todo, we can let the parent component take control by making every todo a slot, then binding
todo
as a slot prop:Now when we use the
<todo-list>
component, we can optionally define an alternative <template>
for todo items, but with access to data from the child:However, even this barely scratches the surface of what scoped slots are capable of. For real-life, powerful examples of scoped slot usage, we recommend browsing libraries such as Vue Virtual Scroller, Vue Promised, and Portal Vue.
Deprecated Syntax
The
v-slot
directive was introduced in Vue 2.6.0, offering an improved, alternative API to the still-supported slot
and slot-scope
attributes. The full rationale for introducing v-slot
is described in this RFC. The slot
and slot-scope
attributes will continue to be supported in all future 2.x releases, but are officially deprecated and will eventually be removed in Vue 3.Named Slots with the slot
Attribute
Deprecated in 2.6.0+. See here for the new, recommended syntax.
To pass content to named slots from the parent, use the special
slot
attribute on <template>
(using the <base-layout>
component described here as example):Or, the
slot
attribute can also be used directly on a normal element:There can still be one unnamed slot, which is the default slot that serves as a catch-all for any unmatched content. In both examples above, the rendered HTML would be:
Scoped Slots with the slot-scope
Attribute
Deprecated in 2.6.0+. See here for the new, recommended syntax.
To receive props passed to a slot, the parent component can use
<template>
with the slot-scope
attribute (using the <slot-example>
described here as example):Here,
slot-scope
declares the received props object as the slotProps
variable, and makes it available inside the <template>
scope. You can name slotProps
anything you like similar to naming function arguments in JavaScript.Here
slot='default'
can be omitted as it is implied:The
slot-scope
attribute can also be used directly on a non-<template>
element (including components):The value of
slot-scope
can accept any valid JavaScript expression that can appear in the argument position of a function definition. This means in supported environments (single-file components or modern browsers) you can also use ES2015 destructuring in the expression, like so:Using the
<todo-list>
described here as an example, here’s the equivalent usage using slot-scope
:← Custom EventsDynamic & Async Components →
Caught a mistake or want to contribute to the documentation? Edit this on GitHub! Deployed on Netlify .
Tutorial
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.
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>
.ParentComponent.vue
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:ParentComponent.vue
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.SecretRecipeBurger.vue
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!