(JS) responsibility chain mode

（JS） Responsibility chain pattern
One step operation is divided into multiple roles
Separate roles , Use a chain to string together

class Action {
    
	constructor(name) {
    
		this.name = name;
		this.nextAction = null;
	}
	
	setNextAction(action) {
    
		this.nextAction = action;
	}
	
	handle() {
    
		console.log(`${
      this.name} The examination and approval `);
		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 The examination and approval 
22 The examination and approval 
33 The examination and approval