Teal TealUI

委托util/delegate

允许动态增删要执行的函数。

基本用法
API
Delegate 类

基本用法

委托即函数数组。执行委托即执行数组中的每个函数。函数数组可以动态增删函数，以此增加程序的灵活性。

import Delegate from "util/delegate";

document.onclick = new Delegate();              // 创建新的委托。
document.onclick.add(function() { alert(1) });   // 添加委托函数。
document.onclick.add(function() { alert(2) });   // 添加委托函数。

API

Delegate 类

继承自：Function

表示一个委托。

字段 类型 描述 继承自
⮞ funcs : Function[]

获取所有委托的函数。

 Function[]

获取所有委托的函数。

 —
⮞ prototype : any

继承自

Function

 any Function
⮞ length : number

(只读)

继承自

Function

 number

(只读)

 Function
⮞ arguments : any

继承自

Function

 any Function
⮞ caller : Function

继承自

Function

 Function Function
⮞ name : string

(只读)Returns the name of the function. Function names are read-only and can not be changed.

继承自

Function

 string

(只读)Returns the name of the function. Function names are read-only and can not be changed.

 Function
方法 描述 继承自
⮞ new Delegate(...)(...funcs:Function[]):Delegate

初始化新的委托。

参数 类型 描述 默认值
funcs Function[] —

返回值

类型：Delegate

初始化新的委托。

 —
⮞ add(func)(func:Function):void

添加一个委托函数。

参数 类型 描述 默认值
func* Function —

返回值

类型：void

示例

var del = new Delegate()
del.add(() => { console.log("teal") })
del() // 控制台输出 teal

添加一个委托函数。

 —
⮞ remove(func)(func:Function):void

删除一个委托函数。

参数 类型 描述 默认值
func* Function —

返回值

类型：void

示例

var fn = () => { console.log("teal") }
var del = new Delegate()
del.add(fn)
del.remove(fn)
del() // 控制台不输出

删除一个委托函数。

 —
⮞ clear()():void

删除所有委托函数。 var del = new Delegate() del.add(() => { console.log("teal") }) del.clear() del() // 控制台不输出

返回值

类型：void

删除所有委托函数。 var del = new Delegate() del.add(() => { console.log("teal") }) del.clear() del() // 控制台不输出

 —
⮞ apply(thisArg, ...)(thisArg:any, argArray?:any):any

Calls the function, substituting the specified object for the this value of the function, and the specified array for the arguments of the function.

this：Function

参数 类型 描述 默认值
thisArg* any —
argArray any —

返回值

类型：any

继承自

Function

Calls the function, substituting the specified object for the this value of the function, and the specified array for the arguments of the function.

 Function
⮞ call(thisArg, ...)(thisArg:any, ...argArray:any[]):any

Calls a method of an object, substituting another object for the current object.

this：Function

参数 类型 描述 默认值
thisArg* any —
argArray any[] —

返回值

类型：any

继承自

Function

Calls a method of an object, substituting another object for the current object.

 Function
⮞ bind(thisArg, ...)(thisArg:any, ...argArray:any[]):any

For a given function, creates a bound function that has the same body as the original function. The this object of the bound function is associated with the specified object, and has the specified initial parameters.

this：Function

参数 类型 描述 默认值
thisArg* any —
argArray any[] —

返回值

类型：any

继承自

Function

For a given function, creates a bound function that has the same body as the original function. The this object of the bound function is associated with the specified object, and has the specified initial parameters.

 Function
⮞ toString()():string

Returns a string representation of a function.

返回值

类型：string

继承自

Function

Returns a string representation of a function.

 Function
⮞ [Symbol.hasInstance](value)(value:any):boolean

Determines whether the given value inherits from this function if this function was used as a constructor function.

A constructor function can control which objects are recognized as its instances by 'instanceof' by overriding this method.

参数 类型 描述 默认值
value* any —

返回值

类型：boolean

继承自

Function

Determines whether the given value inherits from this function if this function was used as a constructor function.

A constructor function can control which objects are recognized as its instances by 'instanceof' by overriding this method.

 Function