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              <div class="button button--1">1</div>
<div class="button button--2">2</div>
<div class="button button--3">3</div>
<div class="button button--4">4</div>
<div class="button button--5">5</div>
<div class="button button--6">6</div>
            
          
!
            
              .button
	background-color: blue
	width: 100px
	height: 100px
	float: left

	&--2
		background-color: red
	
	&--3
		background-color: green
	&--4
		background-color: yellow

	&--5
		background-color: blue
	
	&--6
		background-color: red
            
          
!
            
              //参考 https://app.codegrid.net/entry/practical-jquery-1
//    http://www.jquerystudy.info/reference/events/currentTarget.html
//関数を呼び出すときは()無しで
$('.button--1').on('click', doAlert);

function doAlert (){
	alert("button");
}

//無名関数を記述し、それを実行
$('.button--2').on('click', function(){
	alert("無名関数");
});

//複数のイベントをスペースでつなぐことが出来る
$('.button--3').on('click mouseenter', function(){
	alert("green");
});

//$('セレクタ').on({'key1':value1, 'key2':value2, 'key3':value2 });
//連想配列=オブジェクトの表記

$('.button--4').on({
	'click' : function(){
		alert("click");
	},
	'mouseenter' : function(){
		alert("enter");
	}
});

//関数名を指定して、複数イベントを登録する
$('.button--5').on({
	'click' : doClick,
	'mouseenter' : doMouseEnter
});

function doMouseEnter(){
	alert("mouse enter");
}

function doClick(){
	alert("doCLick");
}

//イベントオブジェクトを、実行する関数に渡すことが出来る
//二番目の引数に、{key: 値}を与えると、関数が受け取ったevent.dataの下に入る。
//のでこの例で言えば、event.data.valueに3が入っている。
$('.button--6').on('click', {value: 3,test: 4 },doCount);

//eはjQueryオブジェクトだが、e.currentTargetは単なる文字列のようなので、
//それに対してjQueryファンクションを実行する場合には、$()でまずラップする必要がある
function doCount (e){
	console.log(e);
	alert("count: " + e.data.value);
	alert("test: " + e.data.test);
	let htmlContent = $(e.currentTarget).html();
	console.log(htmlContent);
}
            
          
!
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