Vue Js Slot Props
2021年4月8日Register here: http://gg.gg/oz24w
This page assumes you’ve already read the Components Basics. Read that first if you are new to components.
Slot components can declare their own props, these props are then accepted at the top level FormulateInput and passed to the appropriate slot component as a prop. You can declare a slotProp for a specific type of input, or for all inputs. SlotProp declarations should always be an array of string values. # For all inputs types.# Prop Types
V-slot 指令自 Vue 2.6.0 起被引入，提供更好的支持 slot 和 slot-scope attribute 的 API 替代方案。v-slot 完整的由来参见这份 RFC。在接下来所有的 2.x 版本中 slot 和 slot-scope attribute 仍会被支持，但已经被官方废弃且不会出现在 Vue 3 中。 带有 slot attribute 的具名插槽. You can have as many of these components as you like, and the slotted props will remain local to the component where they’re declared. Named slots can also have props; use the let directive on an element with a slot=’.’ Attribute, instead of on the component itself. 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. Let’s go over the renderless slot pattern in Vue and see the problems that it can help solve. Introduced with Vue.js 2.3.0, scoped slots have considerably improved component reusability. For example, the renderless component pattern emerged and solved the problem of providing reusable behavior and pluggable presentation.
So far, we’ve only seen props listed as an array of strings:
Usually though, you’ll want every prop to be a specific type of value. In these cases, you can list props as an object, where the properties’ names and values contain the prop names and types, respectively:
This not only documents your component, but will also warn users in the browser’s JavaScript console if they pass the wrong type. You’ll learn much more about type checks and other prop validations further down this page.# Passing Static or Dynamic Props
So far, you’ve seen props passed a static value, like in:
You’ve also seen props assigned dynamically with v-bind or its shortcut, the : character, such as in:
In the two examples above, we happen to pass string values, but any type of value can actually be passed to a prop.# Passing a Number# Passing a Boolean# Passing an Array# Passing an Object# Passing the Properties of an Object
If you want to pass all the properties of an object as props, you can use v-bind without an argument (v-bind instead of :prop-name). For example, given a post object:
The following template:
Will be equivalent to:# One-Way Data FlowVue Js Slot Props Car Bodies
All props form a one-way-down binding between the child property and the parent one: when the parent property updates, it will flow down to the child, but not the other way around. This prevents child components from accidentally mutating the parent’s state, which can make your app’s data flow harder to understand.
In addition, every time the parent component is updated, all props in the child component will be refreshed with the latest value. This means you should not attempt to mutate a prop inside a child component. If you do, Vue will warn you in the console.
There are usually two cases where it’s tempting to mutate a prop:
*The prop is used to pass in an initial value; the child component wants to use it as a local data property afterwards. In this case, it’s best to define a local data property that uses the prop as its initial value:
*The prop is passed in as a raw value that needs to be transformed. In this case, it’s best to define a computed property using the prop’s value:
Note
Note that objects and arrays in JavaScript are passed by reference, so if the prop is an array or object, mutating the object or array itself inside the child component will affect parent state.# Prop Validation
Components can specify requirements for their props, such as the types you’ve already seen. If a requirement isn’t met, Vue will warn you in the browser’s JavaScript console. This is especially useful when developing a component that’s intended to be used by others.
To specify prop validations, you can provide an object with validation requirements to the value of props, instead of an array of strings. For example:123456789101112131415161718192021222324252627282930313233343536373839404142Vue Js Slot Props Free
When prop validation fails, Vue will produce a console warning (if using the development build).
Note
Note that props are validated before a component instance is created, so instance properties (e.g. data, computed, etc) will not be available inside default or validator functions.# Type Checks
The type can be one of the following native constructors:
*String
*Number
*Boolean
*Array
*Object
*Date
*Function
*Symbol
In addition, type can also be a custom constructor function and the assertion will be made with an instanceof check. For example, given the following constructor function exists:
You could use:Vuejs Slot Prop
to validate that the value of the author prop was created with new Person.# Prop Casing (camelCase vs kebab-case)Vue Js Slot Props Download
HTML attribute names are case-insensitive, so browsers will interpret any uppercase characters as lowercase. That means when you’re using in-DOM templates, camelCased prop names need to use their kebab-cased (hyphen-delimited) equivalents:Vue Js Slots Vs Props
Again, if you’re using string templates, this limitation does not apply.
Register here: http://gg.gg/oz24w
https://diarynote-jp.indered.space
This page assumes you’ve already read the Components Basics. Read that first if you are new to components.
Slot components can declare their own props, these props are then accepted at the top level FormulateInput and passed to the appropriate slot component as a prop. You can declare a slotProp for a specific type of input, or for all inputs. SlotProp declarations should always be an array of string values. # For all inputs types.# Prop Types
V-slot 指令自 Vue 2.6.0 起被引入，提供更好的支持 slot 和 slot-scope attribute 的 API 替代方案。v-slot 完整的由来参见这份 RFC。在接下来所有的 2.x 版本中 slot 和 slot-scope attribute 仍会被支持，但已经被官方废弃且不会出现在 Vue 3 中。 带有 slot attribute 的具名插槽. You can have as many of these components as you like, and the slotted props will remain local to the component where they’re declared. Named slots can also have props; use the let directive on an element with a slot=’.’ Attribute, instead of on the component itself. 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. Let’s go over the renderless slot pattern in Vue and see the problems that it can help solve. Introduced with Vue.js 2.3.0, scoped slots have considerably improved component reusability. For example, the renderless component pattern emerged and solved the problem of providing reusable behavior and pluggable presentation.
So far, we’ve only seen props listed as an array of strings:
Usually though, you’ll want every prop to be a specific type of value. In these cases, you can list props as an object, where the properties’ names and values contain the prop names and types, respectively:
This not only documents your component, but will also warn users in the browser’s JavaScript console if they pass the wrong type. You’ll learn much more about type checks and other prop validations further down this page.# Passing Static or Dynamic Props
So far, you’ve seen props passed a static value, like in:
You’ve also seen props assigned dynamically with v-bind or its shortcut, the : character, such as in:
In the two examples above, we happen to pass string values, but any type of value can actually be passed to a prop.# Passing a Number# Passing a Boolean# Passing an Array# Passing an Object# Passing the Properties of an Object
If you want to pass all the properties of an object as props, you can use v-bind without an argument (v-bind instead of :prop-name). For example, given a post object:
The following template:
Will be equivalent to:# One-Way Data FlowVue Js Slot Props Car Bodies
All props form a one-way-down binding between the child property and the parent one: when the parent property updates, it will flow down to the child, but not the other way around. This prevents child components from accidentally mutating the parent’s state, which can make your app’s data flow harder to understand.
In addition, every time the parent component is updated, all props in the child component will be refreshed with the latest value. This means you should not attempt to mutate a prop inside a child component. If you do, Vue will warn you in the console.
There are usually two cases where it’s tempting to mutate a prop:
*The prop is used to pass in an initial value; the child component wants to use it as a local data property afterwards. In this case, it’s best to define a local data property that uses the prop as its initial value:
*The prop is passed in as a raw value that needs to be transformed. In this case, it’s best to define a computed property using the prop’s value:
Note
Note that objects and arrays in JavaScript are passed by reference, so if the prop is an array or object, mutating the object or array itself inside the child component will affect parent state.# Prop Validation
Components can specify requirements for their props, such as the types you’ve already seen. If a requirement isn’t met, Vue will warn you in the browser’s JavaScript console. This is especially useful when developing a component that’s intended to be used by others.
To specify prop validations, you can provide an object with validation requirements to the value of props, instead of an array of strings. For example:123456789101112131415161718192021222324252627282930313233343536373839404142Vue Js Slot Props Free
When prop validation fails, Vue will produce a console warning (if using the development build).
Note
Note that props are validated before a component instance is created, so instance properties (e.g. data, computed, etc) will not be available inside default or validator functions.# Type Checks
The type can be one of the following native constructors:
*String
*Number
*Boolean
*Array
*Object
*Date
*Function
*Symbol
In addition, type can also be a custom constructor function and the assertion will be made with an instanceof check. For example, given the following constructor function exists:
You could use:Vuejs Slot Prop
to validate that the value of the author prop was created with new Person.# Prop Casing (camelCase vs kebab-case)Vue Js Slot Props Download
HTML attribute names are case-insensitive, so browsers will interpret any uppercase characters as lowercase. That means when you’re using in-DOM templates, camelCased prop names need to use their kebab-cased (hyphen-delimited) equivalents:Vue Js Slots Vs Props
Again, if you’re using string templates, this limitation does not apply.
Register here: http://gg.gg/oz24w
https://diarynote-jp.indered.space
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