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HTML 

              
                <script src="https://d3js.org/d3.v5.min.js"></script>

<svg width="1900" height="900">
<g></g>
</svg>
           <div class = "knopf">
                <button onclick="resetZoom()">Reset zoom</button>
           </div>
           <div class = "knopf2">
                <button onclick="NumtoPerc()">Num to Perc</button>
           </div>

           <div id="auswahl_id" class = "auswahl_class">
            <select id="changeAxisYLabel" onChange = "update()">
                <option value ="absoluteValue">Absolute Value</option>
                <option value ="percentage">Percentage</option>
            </select>
           </div>
!

CSS 

              
                            .knopf{
                position: absolute;
                top: 50px;
                left: 100px;
            }
            .knopf2{
                position: absolute;
                top: 50px;
                left: 200px;
            }
            .auswahl_class{
                position: absolute;
                top: 50px;
                left: 300px;
            }
!

JS 

              
                            // Step 1

            let min = 0;
            let max = 200;
            let x_arr = [];
            let y_arr = [];
            let s_arr = [];
            let z_arr = [];

            for (let i = 0; i < 360; i++) {
                var r = Math.round(Math.random() * (max - min)) + min;
                x_arr[i]= i;
                y_arr[i]= r;
                z_arr.push([x_arr[i],y_arr[i]]);
            }

            s_arr = y_arr.sort(function(a, b){return a - b});

            let neu_arr = [];
            let zz_arr = [];

            for (let i = 0; i < 360; i++) {
                neu_arr[i]= i;
                zz_arr.push([neu_arr[i], s_arr[i]]);
            }

//            console.log(z_arr);
//            console.log(zz_arr);

            // Zweiter und dritter Datensatz

            let x2_arr = [];
            let y2_arr = [];
            let s2_arr = [];
            let neu2_arr = [];
            let zz2_arr = [];

            for (let i = 0; i < 360; i++) {
                var r = Math.round(Math.random() * (max - min)) + min;
                x2_arr[i]= i;
                y2_arr[i]= r;
            }

            s2_arr = y2_arr.sort(function(a, b){return b - a});

            for (let i = 0; i < 360; i++) {
                neu2_arr[i]= i;
                zz2_arr.push([neu2_arr[i], s2_arr[i]]);
            }

            console.log(zz2_arr);

            let x3_arr = [];
            let y3_arr = [];
            let s3_arr = [];
            let neu3_arr = [];
            let zz3_arr = [];

            for (let i = 0; i < 360; i++) {
                var r = Math.round(Math.pow(Math.random(), 3) * (max - min)) + min;
                x3_arr[i]= i;
                y3_arr[i]= r;
            }

            s3_arr = y3_arr.sort(function(a, b){return a - b});

            for (let i = 0; i < 360; i++) {
                neu3_arr[i]= i;
                zz3_arr.push([neu3_arr[i], s3_arr[i]]);
            }

            console.log(zz3_arr);

            var dataset1 = zz_arr;
            var dataset2 = zz2_arr;
            var dataset3 = zz3_arr;

            // Step 3
            var svg = d3.select("svg"),
                margin = 200,
                width = svg.attr("width") - margin, //1700
                height = svg.attr("height") - margin //700

                const offsetX = margin/2 + width/2;
                const offsetY = margin/2 + height/2;
    
            // Step 4 
            let xScale = d3.scaleLinear().domain([0 , 365]).range([0, width]),
                yScale = d3.scaleLinear().domain([0, 210]).range([height, 0]),           
                newX = xScale,
                newY = yScale;

            // Margins, dadurch gruppiert
            var g = svg.append("g")
                .attr("transform", "translate(" + 100 + "," + 100 + ")");
    
            // Step 5
            // Title
            svg.append('text')
            .attr('x', width/2 + 100)
            .attr('y', 75)
            .attr('text-anchor', 'middle')
            .style('font-family', 'Helvetica')
            .style('font-size', 20)
            .text('Line Chart');
            
            // X label
            svg.append('text')
            .attr('x', width/2 + 85)
            .attr('y', height + 150)
            .attr('text-anchor', 'middle')
            .style('font-family', 'Helvetica')
            .style('font-size', 12)
            .text('Zeitachse');
            
            // Y label
            svg.append('text')
            .attr('text-anchor', 'middle')
            .attr('transform', 'translate(60,' + 435  + ')rotate(-90)')
            .style('font-family', 'Helvetica')
            .style('font-size', 12)
            .text('Wert');

//            var axBot = d3.axisBottom(xScale).ticks(7).tickValues([0, 60, 120, 180, 240, 300, 360]);
//            var axLft = d3.axisLeft(yScale);
    
            // Step 6
            var axBot = g.append("g")
             .attr("transform", "translate(0," + height + ")")
             .attr('id', 'x-axis')
             .call(d3.axisBottom(xScale).ticks(7).tickValues([0, 60, 120, 180, 240, 300, 360]));
            
            var axLft = g.append("g")
             .attr('id', 'y-axis')
             .call(d3.axisLeft(yScale));

            // Don't draw beyond the axes
            var clip = svg.append("defs")
               .append("SVG:clipPath")
               .attr("id", "clip")
               .append("SVG:rect")
               .attr("width", width)
               .attr("height", height)
               .attr("x", 100)
               .attr("y", 100);

            var scatter = svg.append('g')
               .attr("clip-path", "url(#clip)")

            // Step 7
            scatter
//            svg.append('g')
//            .select('#points')
            .selectAll("dot")
            .data(dataset1)
            .enter()
            .append("circle")
            .attr("cx", function (d) { return xScale(d[0]); } )
            .attr("cy", function (d) { return yScale(d[1]); } )
            .attr("r", 5)
            .attr("transform", "translate(" + 100 + "," + 100 + ")")
            .style("fill", "#CC0000")
            .on("mouseover",movetooltip)
            .on("mouseout", mouseout);

            scatter
//            svg.append('g')
//            .select('#points')
            .selectAll("dot")
            .data(dataset2)
            .enter()
            .append("circle")
            .attr("cx", function (d) { return xScale(d[0]); } )
            .attr("cy", function (d) { return yScale(d[1]); } )
            .attr("r", 5)
            .attr("transform", "translate(" + 100 + "," + 100 + ")")
            .style("fill", "#008800")
            .on("mouseover",movetooltip)
            .on("mouseout", mouseout);

            scatter
//            svg.append('g')
//            .select('#points')
            .selectAll("dot")
            .data(dataset3)
            .enter()
            .append("circle")
            .attr("cx", function (d) { return xScale(d[0]); } )
            .attr("cy", function (d) { return yScale(d[1]); } )
            .attr("r", 5)
            .attr("transform", "translate(" + 100 + "," + 100 + ")")
            .style("fill", "#0000FF")
            .on("mouseover",movetooltip)
            .on("mouseout", mouseout);

            // Step 8        
            var line = d3.line()
            .x(function(d) { return xScale(d[0]); }) 
            .y(function(d) { return yScale(d[1]); }) 
            .curve(d3.curveMonotoneX)

            var scatterline = svg.append("g")
               .attr("clip-path", "url(#clip)")

            scatterline
            .append("path")
            .datum(dataset1) 
            .attr("id", "pointline")
            .attr("class", "line") 
            .attr("transform", "translate(" + 100 + "," + 100 + ")")
            .attr("d", line)
            .style("fill", "none")
            .style("stroke", "#CC0000")
            .style("stroke-width", "2")

            scatterline
            .append("path")
            .datum(dataset2) 
            .attr("id", "pointline")
            .attr("class", "line") 
            .attr("transform", "translate(" + 100 + "," + 100 + ")")
            .attr("d", line)
            .style("fill", "none")
            .style("stroke", "#008800")
            .style("stroke-width", "2")

            scatterline
            .append("path")
            .datum(dataset3)
            .attr("id", "pointline")
            .attr("class", "line") 
            .attr("transform", "translate(" + 100 + "," + 100 + ")")
            .attr("d", line)
            .style("fill", "none")
            .style("stroke", "#0000FF")
            .style("stroke-width", "2")

                var zoomCallback = function(){

                    newX = d3.event.transform.rescaleX(xScale);
                    newY = d3.event.transform.rescaleY(yScale);
                
                    axBot.call(d3.axisBottom(newX));

                    let axleft = d3.axisLeft(newY);
                    if (document.getElementById("changeAxisYLabel").value == "percentage") {
                        const maxval = d3.max(dataset1, x => x[1]);
                        axleft.tickFormat(d => Math.round(d*100/maxval) + "%")                    
                    }
                    axLft.call(axleft);

                    d3.selectAll('circle')
                    .attr("cx", (d) => { return newX(d[0]); })
                    .attr("cy", (d) => { return newY(d[1]); });
                
                    d3.selectAll('#pointline')
                    .attr("d",
                        d3.line()
                        .x(function(d) { return newX(d[0]); }) 
                        .y(function(d) { return newY(d[1]); }) 
                        .curve(d3.curveMonotoneX)
                    );
                }

                let zoom = d3.zoom()
           	    .scaleExtent([0.5, 9])
                .extent([[0, 0], [width, height]])
                .translateExtent([[0, 0], [width, height]])
	            .on('zoom', zoomCallback);

                d3.select('svg')
                .call(zoom);

                function resetZoom() {
                   d3.select('svg')
                   .transition()
                   .call(zoom.transform, d3.zoomIdentity)
                }

                function NumtoPerc(){
                    const maxval = d3.max(dataset1, x => x[1]);
                    axLft.call(
                    d3.axisLeft(yScale)
                    .tickFormat(d => Math.round(d*100/maxval) + "%")
                    )                    
                }

                function update() {
				var select = document.getElementById('changeAxisYLabel');
				var option = select.options[select.selectedIndex];

                let vv = option.value;
                let tt = option.text;

                    if (vv == "percentage") {
                        console.log("In Prozent angegeben");
                        const maxval = d3.max(dataset1, x => x[1]);
                        axLft.call(
                        d3.axisLeft(newY)
                        .tickFormat(d => Math.round(d*100/maxval) + "%")
                        )                    

                    } else if (vv == "absoluteValue") {
                        console.log("In Zahlen angegeben");

                        const maxval = d3.max(dataset1, x => x[1]);
                        axLft.call(
                        d3.axisLeft(newY)
                        )                    
                    }
                }

			    update();

            // Tooltip

            let tooltip = svg.append("g")
               .attr("transform","translate(100,100)")
               .style("visibility","hidden");

            tooltip.append("rect")
               .attr("width",70)
               .attr("height",30)
               .attr("fill", "#FFFFFF")
               .attr("stroke", "black")
               .attr("rx",10);

            tooltip.append("text")
               .attr("y", 19)
               .attr("x", 5)
               .attr("font-family","Verdana")
               .attr("font-size", 10)
               .text("I'm a Tooltip");

            function movetooltip(d,i) {
                tooltip.attr("transform","translate("+(110+newX(d[0]))+","+(70+newY(d[1]))+")")
  //                     .transition()
  //                     .duration(1000)
                       .style("visibility","visible")
  //                     .style("opacity", 0.5)

                var select = document.getElementById('changeAxisYLabel');
				var option = select.options[select.selectedIndex];

                let vv = option.value;

                const maxval = d3.max(dataset1, x => x[1]);

                tooltip.select("text")
                .text((vv == "percentage") ? d[0] + " : "+ Math.round(d[1]*100/maxval) + "%" : d[0] + " : "+ d[1])
               }

            function mouseout(){
                tooltip
                .style("visibility", "hidden")
                .transition()
                .duration(5000);
            }
!
999px

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