JavaScript 设计模式：工厂模式详解与实战

class Product {
	constructor(name} {
		this.name = name
	}
	init() {console.log('init')}
	fun1() {console.log('fun1')}
	fun2() {console.log('fun2')}
}
// 此处的Creator就是工厂
class Creator {
	create(name) {
		// 此处返回的是实例，工厂模式的特点
		return new Procuct(name)
	}
}
// 运行代码
let creator = new Creator()
let p = creator.create('p1')
p.init()
p.fun1()
p.fun2()

// jquery 代码为工厂模式
class jQuery {
    constructor(selector) {
        let slice = Array.prototype.slice
        let dom = slice.call(document.querySelectorAll(selector))
        let len = dom ? dom.length : 0
        for (let i = 0; i < len; i++) {
            this[i] = dom[i]
        }
        this.length = len
        this.selector = selector || ''
    }
    append(node) {}
    addClass(name) {}
    html(data) {}
    // 此处省略若干 API
}
window.$ = function (selector) {
    return new jQuery(selector)
}