JSFiddle - React, Tailwind, and code Playground

HTML

<select id="selectid" onChange="getData(this);" >
	<option value="option1">Deplacement</option>
	<option value="option2">lignes</option>
</select>
<div id="id_click">click</div>

JavaScript

//function mode select
var option = 0
function getData(val) {
   this.option = val.value === 'option1' ? 1 : 2;
   show(); 
}

function show() {
 console.log(this.option);
		val = this.option
		if (val == 2){
			var el = document.getElementById('id_click');
			el.onclick = function (e) {
				alert("click2")
				var ev = e || window.event;
				var x2 = el.getAttributeNS(null, "x"); 
				var y2 = el.getAttributeNS(null, "y"); 
				//console.log(x2+" "+y2)
			}
		}
}