url パラメータ

HTML

以下のリンクをクリックしてください
<p>koko ↓ 今見てるページで document.referrer でとる</p>
<a target=_blank href=https://jsfiddle.net/shigetak/052c9jag/?&utm_source=dpc&utm_medium=health&utm_content=20180201&utm_campaign=3toku2>utm_medium=health for jsfiddle </a>

CSS

.tab_wrap {
	position: relative;
}
.bgall {
	width: 100%;
	height: 100%;
	background: rgb(100, 100, 100, 0.9);
	position: absolute;
	top: 0;
	left: 0;
	opacity: 0.9;
}
.bgall p {
	position: absolute;
	top: 50%;
	text-align: center;
	display: inline-block;
	width: 100%;
	color: #fff;
	opacity: 1;
	font-weight: bold;
	font-size: 2rem;
}

@media screen and (min-width:741px) {
.entry_applewatch02 h2 {
	color: #19A59E;
	font-size: 34px;
	font-size: 3.4rem;
	line-height: 1.5;
	letter-spacing: 0.033em;
	font-style: italic;
	font-weight: 400;
	text-align: center;
	margin-bottom: 30px;
}
.panel_area ul {
	display: flex;
	justify-content: space-around;
	width: 80%;
	margin: 20px auto;
}
.panel_area ul li {
	width: 45%;
}
.tabimg01 {
	display: block;
	width: 70%;
	margin: 0 auto;
}
.tab_wrap {
	width: 800px;
	margin: 50px auto 20px;
}
input[type="radio"] {
	display: none;
}
.tab_area {
	font-size: 0;
	margin: 0 10px;
	text-align: center;
}
.tab_area label {
	width: 350px;
	margin: 0 5px;
	display: inline-block;
	padding: 12px 0;
	color: #fff;
	background: #929292;
	text-align: center;
	font-size: 13px;
	cursor: pointer;
	transition: ease 0.2s opacity;
	border-radius: 10px 10px 0 0
}
.tab_area label:hover {
	opacity: 0.5;
}
.panel_area {
	background: #f4f4f4;
	border-top: 5px solid #ef980a;
}
.tab_panel {
	width: 100%;
	padding: 40px 0;
	display: none;
}
.tab_panel p {
	font-size: 14px;
	letter-spacing: 1px;
	text-align: center;
}
#tab1:checked ~ .tab_area .tab1_label {
	background: #ef980a;
	color: #fff;
}
#tab1:checked ~ .panel_area #panel1 {
	display: block;
}
#tab2:checked ~ .tab_area .tab2_label {
	background: #ef980a;
	color: #fff;
}
#tab2:checked ~ .panel_area #panel2 {
	display: block;
}
#tab3:checked ~ .tab_area .tab3_label {
	background: #ef980a;
	color: #fff;
}
#tab3:checked ~ .panel_area #panel3 {
	display: block;
}
#tab4:checked ~ .tab_area .tab4_label {
	background: #ef980a;
	color: #fff;
}
#tab4:checked ~ .panel_area #panel4 {
	display: block;
}
#tab5:checked...

JavaScript

// referrer	
var a = document.referrer;
alert('ここから来ましたね\n ' + a);

//window.location.searchをURLSearchParamsに渡す
var urlParams = new URLSearchParams(document.referrer);

//param1の値を取得する
alert('utm_source : ' +urlParams.get('utm_source'));
alert('utm_medium : ' +urlParams.get('utm_medium'));
alert('utm_content : ' +urlParams.get('utm_content'));