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本篇內(nèi)容主要講解“js中介者模式怎么實(shí)現(xiàn)”,感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷,實(shí)用性強(qiáng)。下面就讓小編來帶大家學(xué)習(xí)“js中介者模式怎么實(shí)現(xiàn)”吧!
概念
1、通過一個(gè)中介對象,所有其他相關(guān)對象都通過中介對象通信,而不是相互引用。
2、當(dāng)一個(gè)對象發(fā)生變化時(shí),只需通知中介對象。通過中介模式,可以解除對象與對象之間的耦合關(guān)系。
實(shí)例
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <p>1 0 30</p> <div id="results"></div> <script> //Mediator //這里用了構(gòu)造器模式 function Player(name) { this.name = name; this.point = 0; } Player.prototype.play = function() { this.point += 1; mediator.played(); } var scoreboard = { ele : document.getElementById("results"), update : function(score) { var i, msg = ""; for(i in score) { if(score.hasOwnProperty(i)) { msg += "<p><strong>" + i + "</strong>"; msg += score[i]; msg += "</p>"; } } this.ele.innerHTML = msg; } }; var mediator = { players : {}, setup : function() { var player = this.players; player.home = new Player("Home"); player.guest = new Player("Guest"); }, played : function() { var player = this.players; score = { Home : player.home.point, Guest : player.guest.point }; scoreboard.update(score); }, keypress : function(e) { e = e || window.event; //事件監(jiān)聽 if(e.which === 49) { mediator.players.home.play(); } if(e.which === 48) { mediator.players.guest.play(); } } }; mediator.setup(); window.onkeypress = mediator.keypress; setTimeout(function(){ window.onkeypress = null; console.log("game over!"); }, 30000); </script> </body> </html>
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