（JS）职责链模式

（JS）职责链模式
一步操作分为多个角色来完成
将角色分开，使用一个链串起来

class Action {
    
	constructor(name) {
    
		this.name = name;
		this.nextAction = null;
	}
	
	setNextAction(action) {
    
		this.nextAction = action;
	}
	
	handle() {
    
		console.log(`${
      this.name}审批`);
		if (this.nextAction != null) {
    
			this.nextAction.handle();
		}
	}
}
let a1 = new Action("11");
let a2 = new Action("22");
let a3 = new Action("33");
a1.setNextAction(a2);
a2.setNextAction(a3);
a1.handle();

11审批
22审批
33审批