如何用原型B扩展原型A,所以每当我调用原型A时,两者都会被执行?
var Helper = function() {
}
Helper.prototype.resizer = function() {
$('body').append(' Window resized ');
}
var Something = function() {
// Extend Helper.resizer with Something.anything
// extend(Helper.resizer, this.anything);
}
Something.prototype.anything = function() {
$('body').append(' Run this on resize to ');
}
var help = new Helper();
var some = new Something();
$(window).on("resize", function(){
help.resizer();
});
在codepen上做了一个例子: http://codepen.io/robbue/pen/892c8f61e1b5a970d6f694a59db401a6 jQuery允许,或者只是vanilla。
答案 0 :(得分:2)
我真的不明白你的问题,因为原型不是执行,但我认为你想要这样的事情:
var Helper = function() {}
Helper.prototype.resizer = function() {
$('body').append(' Window resized ');
}
var Something = function(h) {
var oldresizer = h.resizer,
that = this;
h.resizer = function() {
var res = oldresizer.apply(this, arguments);
that.anything();
return res;
};
}
Something.prototype.anything = function() {
$('body').append(' Run this on resize to ');
}
var help = new Helper();
new Something(help);
$(window).on("resize", function(){
help.resizer();
});
或那:
function Helper() {}
Helper.prototype.resizer = function() {
$('body').append(' Window resized ');
}
function Something() { // inherits Helper
Helper.apply(this, arguments);
}
Something.prototype = Object.create(Helper.prototype);
Something.prototype.anything = function() {
$('body').append(' Run this on resize to ');
};
Something.prototype.resizer = function() {
Helper.prototype.resizer.call(this);
this.anything();
};
var help = new Something(help);
$(window).on("resize", function(){
help.resizer();
});