<button id="button">按我</button>
<script>
var MacroCommand = function () {
return {
commandsList: [],
add: function (command) {
console.log(command);
this.commandsList.push(command);
},
execute: function () {
for (var i = 0, command; (command = this.commandsList[i++]); ) {
command.execute();
}
},
};
};
var openAcCommand = {
execute: function () {
console.log("打开空调");
},
};
/**********家里的电视和音响是连接在一起的，所以可以用一个宏命令来组合打开电视和打开音响的命令
*********/
var openTvCommand = {
execute: function () {
console.log("打开电视");
},
};
var openSoundCommand = {
execute: function () {
console.log("打开音响");
},
};
var macroCommand1 = MacroCommand();
macroCommand1.add(openTvCommand);
macroCommand1.add(openSoundCommand);
/*********关门、打开电脑和打登录 QQ 的命令****************/
var closeDoorCommand = {
execute: function () {
console.log("关门");
},
};
var openPcCommand = {
execute: function () {
console.log("开电脑");
},
};
var openQQCommand = {
execute: function () {
console.log("登录 QQ");
},
};
var macroCommand2 = MacroCommand();
macroCommand2.add(closeDoorCommand);
macroCommand2.add(openPcCommand);
macroCommand2.add(openQQCommand);
/*********现在把所有的命令组合成一个“超级命令”**********/
var macroCommand = MacroCommand();
macroCommand.add(openAcCommand);
macroCommand.add(macroCommand1);
macroCommand.add(macroCommand2);
/*********最后给遥控器绑定“超级命令”**********/
var setCommand = (function (command) {
document.getElementById("button").onclick = function () {
command.execute();
};
})(macroCommand);
</script>
