对象的默认功能？ [英] Default function on an object?

问题描述

是否可以在一个对象上设置一个默认函数，例如当我调用 myObj（）时，该函数被执行？让我们说我有以下 func object

Is it possible to set a default function on an object, such that when I call myObj() that function is executed? Let's say I have the following func object

function func(_func) {
    this._func = _func;

    this.call = function() {
        alert("called a function");
        this._func();
    }
}

var test = new func(function() {
    // do something
});

test.call();

我想要替换 test.call（），只需 test（）。

​I'd like to replace test.call() with simply test(). Is that possible?

推荐答案

返回一个函数：

return a function:

function func(_func) {
    this._func = _func;

    return function() {
        alert("called a function");
        this._func();
    }
}

var test = new func(function() {
    // do something
});

test();

但是这个指的是 return function（right？）or window ，您必须缓存 this 才能从函数内部访问它（ this._func （）; ）

but then this refers to the returned function (right?) or window, you will have to cache this to access it from inside the function (this._func();)

function func(_func) {
    var that = this;

    this._func = _func;

    return function() {
        alert("called a function");
        that._func();
    }
}

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