Show tooltip and select moves into view

www/graph.css

@@ -17,9 +17,9 @@
     --color9: #577590;
     --color10: #277da1;
     --hover-color: var(--color1);
+    --hover-related-color: #d1bce9;
     /* --hover-color: var(darkblue); */
     --selected-color: var(--color1);
-    --selected-color: var(--color1);
 }
 
 body {
@@ -41,16 +41,20 @@ svg.dragging {
 }
 
 #arrowHead {
-    fill: #9df32c;
+    fill: #b0e99a;
 }
 
 #arrowHeadSelected {
     fill:  var(--hover-color);;
 }
+#arrowHeadSelectedRelated {
+    fill:  var(--hover-related-color);;
+}
 
 svg .links line, svg .links path {
-    stroke: #f3722c;
+    /* stroke: #f3722c; */
-    stroke: #9df32c;
+    /* stroke: #9df32c; */
+    stroke: #b0e99a;
     stroke-width: 6;
     fill: none;
     transition: stroke-width 1s;
@@ -58,6 +62,18 @@ svg .links line, svg .links path {
 }
 
 svg .links line.hover, svg .links path.hover {
+    stroke: var(--hover-color);
+    /* stroke-width: 12; */
+    marker-end: url(#arrowHeadSelected);
+}
+
+svg .links .linkedHover path{
+    stroke: var(--hover-related-color);
+    stroke-width: 12;
+    marker-end: url(#arrowHeadSelectedRelated);
+}
+
+svg .links .linkedSelected path{
     stroke: var(--hover-color);
     stroke-width: 12;
     marker-end: url(#arrowHeadSelected);
@@ -67,10 +83,9 @@ svg.zoomed .links line, svg.zoomed .links path {
     stroke-width: 2;
 }
 
-svg.zoomed .links line, svg.zoomed .links path.hover {
+/* svg.zoomed .links line, svg.zoomed .links path.hover {
-    stroke-width: 2;
     stroke-width: 4;
-}
+} */
 
 svg .title {
     font-size: 200;
@@ -88,7 +103,7 @@ svg #countries .country.eu_country {
     fill: black;
 }
 
-svg #header #titlePath, svg #header #subtitlePath {
+svg #header #titlePath, svg #header #title2Path, svg #header #subtitlePath {
     stroke: none;
     fill: none;
 }
@@ -104,8 +119,8 @@ svg #header text {
 }
 
 svg #header text:nth-of-type(2) {
-    dominant-baseline: hanging;
+    /* dominant-baseline: hanging; */
-    transform: translate(10px, 25px);
+    /* transform: translate(10px, 25px); */
 }
 
 svg #header text#subtitle {
@@ -131,13 +146,15 @@ svg #header text#subtitle {
     /* font-size: 16pt; */
     /*Set this in JS*/
     transition: font-size .4s, opacity 1s;
-    fill: white;
+    fill: white; /*also when hovering node*/
     opacity: 1;
     pointer-events: none;
     /*prevent mouse glitches*/
 }
 
-.node:not(:hover):not(.linkHover) text.nodeTitle.overlapping {
+/* .node:not(:hover):not(.linkHover) text.nodeTitle.overlapping { */
+.node text.nodeTitle.overlapping {
+    /* used to be shown on hover, but disabled now that we have a tooltip */
     opacity: 0;
 }
 
@@ -155,26 +172,30 @@ svg.zoomed.zoomed2 .node text.nodeTitle {
 
 /* Whenever a connected link is hovered */
 
-.node.linkHover circle, .node.linkHover path, label:hover .node path {
+.node.linkHover circle, .node.linkHover path, .node.linkedHover path, label:hover .node path {
-    fill: var(--hover-color) !important;
+    fill: var(--hover-related-color) !important;
-    stroke: var(--hover-color);
+    stroke: var(--hover-related-color);
     stroke-width: 5px;
 }
+.node.linkedSelected path {
+    fill: var(--hover-related-color) !important;
+    /* same as linkHover/linkedHover but without border */
+}
 
 .node.linkHover text.nodeTitle.overlapping {
     transition: opacity 0s;
 }
 
-.node:hover circle, .node:hover path {
+.node:hover circle, .node:hover path, .node.selected path {
     fill: var(--hover-color) !important;
     stroke: var(--hover-color);
     stroke-width: 5px;
 }
-
+/* 
 .node:hover text {
     transition: none;
     fill: var(--hover-color);
-}
+} */
 
 .node.selected circle, .node.selected path {
     fill: var(--selected-color) !important;
@@ -248,6 +269,7 @@ svg.zoomed.zoomed2 .node text.nodeTitle {
     display: none;
 }
 
+
 #nodeInfo h2 {
     margin: 0;
     padding: 0;
@@ -258,6 +280,45 @@ svg.zoomed.zoomed2 .node text.nodeTitle {
     height: calc(100vh - 40px - 20px - 30px);
 }
 
+#tooltip{
+    position:absolute;
+    z-index: 100;
+    opacity: 1;
+    transition: opacity .3s;
+    background:white;
+    padding: 20px 10px;
+    border-radius: 5px;
+    box-shadow: 2px 2px 5px rgba(0, 0, 0, .5);
+}
+
+#tooltip:not(.visible){
+    position:absolute;
+    z-index: 100;
+    opacity:0;
+    pointer-events: none;
+}
+
+#tooltip h3{
+    margin: 5px 0;
+    text-align: center;;
+}
+#tooltip .category{
+    display: block;
+    color: black;
+    text-align: center;;
+}
+#tooltip .category::before{
+    content:'· '
+}
+#tooltip .category::after{
+    content:' ·'
+}
+#tooltip .clickForMore{
+    display: block;
+    color: gray;
+    text-align: center;;
+}
+
 #closeInfo {
     cursor: pointer;
     position: absolute;
@@ -283,6 +344,7 @@ header {
     right: 0;
     background: white;
     padding: 10px;
+    border-top-left-radius: 5px;
 }
 
 h1 {
@@ -353,3 +415,30 @@ p.subtitle {
 #alluvial .flow_label text {
     font-size: 30;
 }
+
+
+
+body.light{
+    background:white;
+}
+body.light #map .borders{
+    stroke: white;
+}
+body.light svg #countries .country{
+    fill:white;
+    stroke:lightgray;
+    stroke-width: 5;;
+}
+body.light svg #countries .country.eu_country{
+    fill:rgb(235, 226, 236);
+}
+body.light .node text.nodeTitle {
+    fill:black;
+}
+
+body.light #arrowHead{
+    fill:#577590;
+}
+body.light svg .links line, body.light svg .links path {
+    stroke:#577590;
+}

www/graph.js

@@ -4,7 +4,7 @@ const CONFIG = {
     'subtitle': "Connections in the European Union & beyond",
     // 'nodeSize': 8,
     'nodeRadius': 5,
-    'nodeRepositionPadding': 8,
+    'nodeRepositionPadding': 10,
     'baseUrl': 'https://www.securityvision.io/wiki/index.php/',
     'dataUrl': 'result.json',
     'preSimulate': false, // run simulation before starting, so we don't start with lines jumping around
@@ -51,7 +51,16 @@ const CONFIG = {
         "Company": ["Managed by", "Provided by", "Developped by (institutions)"],
         "Tech": ["Technologies Used", "Software Deployed"],
         "Funding": ["Funded by"],
-    }
+    },
+    "zoom": {
+        "scale_min": .2,
+        "scale_max": 20,
+    },
+
+    "cases": [
+        "Data-lab Burglary-Free Neighbourhood",
+        "Dragonfly Project",
+    ]
 };
 
 // let width = window.innerWidth;
@@ -59,7 +68,7 @@ const CONFIG = {
 
 
 function getSymbolForCategories(classes) {
-    if(!Array.isArray(classes)) {
+    if (!Array.isArray(classes)) {
         classes = [classes];
     }
     if (classes.includes('Institution')) {
@@ -194,12 +203,19 @@ function getClasses(obj) {
     return 'node ' + classes.join(' ');
 }
 
+function getLinkId(link) {
+    return "link_" + link.nr;
+    // return "link-" + link.source.id + '-' + link.target.id + '-' + slugify(link.name);
+}
+
 
 
 class NodeMap {
     constructor(parent) {
         this.root = d3.select(parent);
         this.resizeEvent = window.addEventListener('resize', this.resize.bind(this));
+        this.tooltipEl = document.getElementById('tooltip');
+        this.selectedNode = null;
     }
 
     resize() {
@@ -247,7 +263,7 @@ class NodeMap {
 
     render() {
         this.svg = this.root.append('svg')
-        this.svg.append('defs').html(`<marker markerHeight="4" markerWidth="4" refY="0" refX="6" viewBox="0 -3 8 6" preserveAspectRatio="none" orient="auto" id="arrowHead" ><path d="M0,-3L8,0L0,3"></path></marker><marker markerHeight="4" markerWidth="4" refY="0" refX="6" viewBox="0 -3 8 6" preserveAspectRatio="none" orient="auto" id="arrowHeadSelected"><path d="M0,-3L8,0L0,3"></path></marker>
+        this.svg.append('defs').html(`<marker markerHeight="4" markerWidth="4" refY="0" refX="6" viewBox="0 -3 8 6" preserveAspectRatio="none" orient="auto" id="arrowHead" ><path d="M0,-3L8,0L0,3"></path></marker><marker markerHeight="4" markerWidth="4" refY="0" refX="6" viewBox="0 -3 8 6" preserveAspectRatio="none" orient="auto" id="arrowHeadSelected"><path d="M0,-3L8,0L0,3"></path></marker><marker markerHeight="4" markerWidth="4" refY="0" refX="6" viewBox="0 -3 8 6" preserveAspectRatio="none" orient="auto" id="arrowHeadSelectedRelated"><path d="M0,-3L8,0L0,3"></path></marker>
         <!--Sketching:-->
         <defs>
           <filter id="tint">
@@ -315,23 +331,25 @@ class NodeMap {
             .attr("d", this.proj(this.borders))
 
         let zoomTimeout = null;
-        const zoom = d3.zoom().scaleExtent([0.2, 10]).on("start", () => {
+        this.zoom = d3.zoom()
+            .scaleExtent([CONFIG.zoom.scale_min, CONFIG.zoom.scale_max])
+            .on("start", () => {
                 this.svg.node().classList.add("dragging");
             }).on("end", () => {
                 this.svg.node().classList.remove("dragging");
-        }).on("zoom", ({ transform }) => {
+            }).on("zoom", (evt) => {
-            this.container.attr("transform", transform);
+                this.container.attr("transform", evt.transform);
                 const oldZoom = this.svg.classed('zoomed');
-            const newZoom = transform.k > 2.0;
+                const newZoom = evt.transform.k > 2.0;
                 if (zoomTimeout) {
                     clearTimeout(zoomTimeout)
                 }
                 zoomTimeout = setTimeout(() => {
-                this.g_nodes.attr('style', `font-size:${22000 / this.height / transform.k}pt`)
+                    this.g_nodes.attr('style', `font-size:${22000 / this.height / evt.transform.k}pt`)
                     setTimeout(() => {
                         this.calculateLabels();
                     }, 500);
-            }, 500);
+                }, 250);
                 if (oldZoom != newZoom) {
                     this.svg.classed('zoomed', newZoom);
 
@@ -343,6 +361,10 @@ class NodeMap {
             "type": "LineString",
             "coordinates": []
         };
+        const title2Feature = {
+            "type": "LineString",
+            "coordinates": []
+        };
         const subtitleFeature = {
             "type": "LineString",
             "coordinates": []
@@ -351,12 +373,17 @@ class NodeMap {
             // projection apparently tries to find the shortest path between two points
             // which is NOT following a lat/lon line on the globe
             titleFeature.coordinates.push([index, 52]);
+            title2Feature.coordinates.push([index, 50.5]);
             subtitleFeature.coordinates.push([index, 49]);
         }
         this.title.append("path")
             .attr("id", "titlePath")
             .attr("d", this.proj(titleFeature))
             ;
+        this.title.append("path")
+            .attr("id", "title2Path")
+            .attr("d", this.proj(title2Feature))
+            ;
         this.title.append("path")
             .attr("id", "subtitlePath")
             .attr("d", this.proj(subtitleFeature))
@@ -364,7 +391,7 @@ class NodeMap {
         this.title.append("text")
             .html('<textPath  xlink:href="#titlePath">Biometric</textPath>')
         this.title.append("text")
-            .html('<textPath  xlink:href="#titlePath">Mass Surveillance</textPath>')
+            .html('<textPath  xlink:href="#title2Path">Mass Surveillance</textPath>')
         this.title.append("text")
             .attr("id", "subtitle")
             .html('<textPath  xlink:href="#subtitlePath">' + CONFIG.subtitle + '</textPath>')
@@ -448,8 +475,8 @@ class NodeMap {
             ;
 
         this.svg
-            .call(zoom)
+            .call(this.zoom)
-            .call(zoom.transform, d3.zoomIdentity.scale(.5, .5));
+            .call(this.zoom.transform, d3.zoomIdentity.scale(.5, .5));
 
 
         this.update();
@@ -457,6 +484,14 @@ class NodeMap {
         setTimeout(() => this.calculateLabels(), 1000);
     }
 
+    resetZoom() {
+        this.deselectNode();
+        this.svg
+            .transition()
+            .duration(2000) // milliseconds
+            .call(this.zoom.transform, d3.zoomIdentity.scale(.5, .5));
+    }
+
     getSizeForNode(node) {
         return this.nodeSize;
     }
@@ -532,17 +567,111 @@ class NodeMap {
         console.log(`moved ${moved} nodes`);
     }
 
+    showTooltip(el, node, links) {
+        // TODO: make links optional (otherwise collect links here)
+
+        this.tooltipEl.innerHTML = `
+        <span class='category'>${getCategories(node)[0]}</span>
+        <h3>${node.fulltext}</h3>
+        `;
+        if (links.length) {
+            const rels = links.length === 1 ? 'relationship' : 'relationships';
+            this.tooltipEl.innerHTML += `
+            <span class='clickForMore'>Click to examine ${links.length} ${rels}</span>
+            `;
+        }
+        const rect = el.getBoundingClientRect()
+        const rectTT = this.tooltipEl.getBoundingClientRect();
+        this.tooltipEl.style.top = (rect.top - rectTT.height) + 'px';
+        this.tooltipEl.style.left = (rect.left + rect.width / 2 - rectTT.width / 2) + 'px';
+        // console.log(el, node, rect.top);
+
+        this.tooltipEl.classList.add('visible');
+    }
+
+    hideTooltip() {
+        this.tooltipEl.classList.remove('visible');
+    }
+
+    selectNode(node) {
+        this.deselectNode(); // remove potential old selection
+
+        this.selectedNode = node;
+        let links = [];
+        let connectedNodes = [];
+        for (let link of this.graph.links) {
+            if (link.source == node || link.target == node) {
+                links.push(link);
+                const otherNode = node == link.target ? link.source : link.target;
+                connectedNodes.push(otherNode);
+            }
+        }
+
+        let allNodes = [...connectedNodes, node];
+
+        this.zoomFit(allNodes);
+
+        document.getElementById(node.id).classList.add('selected');
+        connectedNodes.forEach(n => document.getElementById(n.id).classList.add('linkedSelected'));
+        links.forEach(l => document.getElementById(getLinkId(l)).classList.add('linkedSelected'));
+
+        // TODO: show details;
+
+        // alert('not yet implemented');
+    }
+
+    deselectNode() {
+        this.selectedNode = null;
+        let nodeEls = document.getElementsByClassName('selected');
+        while (nodeEls.length) {
+            nodeEls[0].classList.remove('selected');
+        }
+        let els = document.getElementsByClassName('linkedSelected');
+        while (els.length) {
+            els[0].classList.remove('linkedSelected');
+        }
+    }
+
     update() {
-        console.log(this.graph)
+        // console.log(this.graph)
 
         this.resolveOverlaps();
 
         // see also: https://www.createwithdata.com/enter-exit-with-d3-join/
         this.node = this.node.data(this.graph.nodes, d => d.id)
             .join((enter) => {
-                let group = enter.append("g").attr("class", getClasses);
+                let group = enter.append("g")
+                    .attr("class", getClasses)
+                    .attr("id", (n) => getIdForTitle(n.fulltext));
                 // group.call(drag(simulation));
-                group.on("click", (evt, n) => selectNode(evt, n, node));
+                group.on("click", (evt, n) => this.selectNode(n));
+                group.on("mouseover", (evt, n) => {
+                    // d3.select(this).classed('hover', true);
+                    const links = document.getElementsByClassName('link');
+                    const linkedLinks = [];
+                    for (let link of links) {
+                        const l = d3.select(link).datum();
+                        if (n == l.target || n == l.source) {
+                            link.classList.add('linkedHover');
+                            // make sure it's the last element, so it's drawn on top
+                            // link.parentNode.appendChild(link); .. causes gliches
+                            // find related related node:
+                            const otherNode = n == l.target ? l.source : l.target;
+                            const otherNodeEl = document.getElementById(otherNode.id);
+                            otherNodeEl.classList.add('linkedHover');
+                            linkedLinks.push(l);
+                        }
+                    }
+                    this.showTooltip(evt.target, n, linkedLinks);
+
+                });
+                group.on("mouseout", (evt, n) => {
+                    this.hideTooltip();
+                    const links = document.getElementsByClassName('linkedHover');
+                    while (links.length) {
+                        links[0].classList.remove('linkedHover');
+                    }
+                });
                 // group.append('circle').attr("r", 5 /*this.nodeSize*/);
                 group.append('path')
                     .attr('d', (n) => {
@@ -637,10 +766,11 @@ class NodeMap {
             .join(
                 enter => {
                     let group = enter.append("g")
-                        .attr("class", (l) => "link " + slugify(l.name));
+                        .attr("class", (l) => "link " + slugify(l.name))
+                        .attr("id", getLinkId);
                     group.append("path")
                         .attr("marker-end", "url(#arrowHead)")
-                        .attr('id', (d, i) => 'linkid_' + i)
+                        .attr('id', (d, i) => 'linkpath_' + i)
                         .on("mouseover", function (ev, link) {
                             d3.select(this).classed('hover', true);
                             const nodes = document.getElementsByClassName('node');
@@ -654,14 +784,17 @@ class NodeMap {
                         }).on("mouseout", function (ev, link) {
                             d3.select(this).classed('hover', false);
                             const nodes = document.getElementsByClassName('linkHover');
-                            for (let n of nodes) {
+                            while (nodes.length) {
-                                n.classList.remove('linkHover');
+                                nodes[0].classList.remove('linkHover');
                             }
                             // l.classed('hover',false);
                             // l.target.classed('hover',false);
                             // l.source.classed('hover',false);
                             // console.log(l,'l');
-                        });
+                        }).on("click", (ev, link) => {
+                            this.selectNode(link.source);
+                        })
+                        ;
                     group.filter((l) => l.name != "City").append("text").attr("class", "labelText").text(function (l) {
                         return l.name;
                     });
@@ -795,6 +928,60 @@ class NodeMap {
     redraw() {
         this.update()
     }
+
+    // viewBox + preserveAspectRatio can lead to a visible area that is larger than
+    // the viewBox. Try to get this
+    getVisibleBox() {
+        const svgEl = this.svg.node()
+        const vbRatio = svgEl.viewBox.baseVal.width / svgEl.viewBox.baseVal.height;
+        const wRatio = this.width / this.height;
+        if (wRatio > vbRatio) {
+            // wider
+            return {
+                width: (wRatio / vbRatio) * svgEl.viewBox.baseVal.width,
+                height: svgEl.viewBox.baseVal.height
+            }
+        } else {
+            // taller
+            return {
+                width: svgEl.viewBox.baseVal.width,
+                height: (vbRatio / wRatio) * svgEl.viewBox.baseVal.height
+            }
+        }
+    }
+
+    zoomFit(nodes, paddingPercent = 0.8, transitionDuration = 2000) {
+        // var bounds = root.node().getBBox();
+        const x0 = Math.min(...nodes.map(n => n.x - CONFIG.nodeRadius));
+        const x1 = Math.max(...nodes.map(n => n.x + CONFIG.nodeRadius));
+        const y0 = Math.min(...nodes.map(n => n.y - CONFIG.nodeRadius));
+        const y1 = Math.max(...nodes.map(n => n.y + CONFIG.nodeRadius));
+
+        const width = x1 - x0;
+        const height = y1 - y0;
+
+        const visibleBox = this.getVisibleBox();
+        const fullWidth = visibleBox.width, //2000, //this.width, TODO: use viewbox now, but consider the overflowing of the vbox
+            fullHeight = visibleBox.height; //2000; //this.height;
+        const viewBox = this.svg.node().viewBox.baseVal;
+        const midX = x0 + width / 2,
+            midY = y0 + height / 2;
+        if (width == 0 || height == 0) return; // nothing to fit
+        let scale = paddingPercent / Math.max(width / fullWidth, height / fullHeight);
+        scale = Math.min(CONFIG.zoom.scale_max, scale);
+        const translate = [fullWidth / 2 - midX, fullHeight / 2 - midY];
+        const transform = d3.zoomIdentity.translate(
+            -midX * scale + viewBox.width / 2,
+            -midY * scale + viewBox.height / 2)
+            .scale(scale);
+        // console.log("zoomFit", x0, x1, y0, y1, translate, scale, transform);
+        this.svg
+            .transition()
+            .duration(transitionDuration || 0) // milliseconds
+            .call(this.zoom.transform, transform);
+        // .call(this.zoom.translateTo, midX, midY)
+        // .call(this.zoom.scaleTo, scale);
+    }
 }
 
 class AlluvialMap {
@@ -838,7 +1025,7 @@ class AlluvialMap {
             .nodeWidth(40) // height
             .nodePadding(10)
             .extent([[1, 5], [2000 - 1, 2000 - 5]]);
-        console.log(this.graph);
+        // console.log(this.graph);
         let s = this.sankey({
             nodes: this.graph.nodes.map(d => Object.assign({}, d)),
             links: this.graph.links.map(d => Object.assign({}, d))
@@ -938,16 +1125,27 @@ class AlluvialMap {
 
 }
 
+titleIdMap = {};
+function getIdForTitle(title) {
+    if (!titleIdMap.hasOwnProperty(title)) {
+        titleIdMap[title] = slugify(title) + `-${Object.keys(titleIdMap).length}`
+    }
+    return titleIdMap[title];
+}
+
 JsonToGraph = function (data) {
     let nodes = [];
     let links = [];
 
     let smwBugFixLocationMaps = {};
     console.log(data)
+    let i = 0;
+    let linkI = 0;
     for (const node_id in data.results) {
         if (Object.hasOwnProperty.call(data.results, node_id)) {
+            i++;
             let node = data.results[node_id];
-            node.id = node.fulltext; //node_id;
+            node.id = getIdForTitle(node.fulltext); //node_id;
             nodes.push(node);
             // console.log(node_id, node);
 
@@ -967,9 +1165,9 @@ JsonToGraph = function (data) {
                 }
                 for (const target_node of node.printouts[prop]) {
                     links.push({
-                        "source": node_id,
+                        "source": node.id,
-                        "target": target_node.fulltext,
+                        "target": getIdForTitle(target_node.fulltext),
-                        "name": prop
+                        "name": prop,
                     })
                 }
             }
@@ -998,14 +1196,18 @@ JsonToGraph = function (data) {
 
     console.debug(`Fixed location for ${fixes} nodes`);
 
-    console.log(links.length);
-
     nodeMap = Object.fromEntries(nodes.map(d => [d['id'], d]));
     links = links.filter(l => nodeMap[l.source] && nodeMap[l.target]).map(l => {
         l.source = nodeMap[l.source];
         l.target = nodeMap[l.target];
+        l.nr = linkI++;
         return l;
-    });
+    }).filter((link, index, self) =>
+        // remove incidental duplicates
+        index === self.findIndex((l) => (
+            l.source.id === link.source.id && l.target.id === link.target.id && l.name === link.name
+        ))
+    );
 
 
 
@@ -1318,9 +1520,9 @@ class Store {
             let inputEl = document.createElement('input')
             let textEl = document.createElement('span');
             let svg = d3.select(labelEl).append('svg')
-            .attr("viewBox", [-12,-12,24,24]);
+                .attr("viewBox", [-12, -12, 24, 24]);
             svg.append('g')
-                .attr("class", "node "+ f)
+                .attr("class", "node " + f)
                 .append('path')
                 .attr('d', getSymbolForCategories(f)());
             inputEl.type = "checkbox";

www/index.html

@@ -8,6 +8,7 @@
 
 <body>
 
+    <div id='tooltip'></div>
     <div id='map'></div>
     <!-- <div id='alluvial'></div> -->
 
@@ -31,6 +32,12 @@
     <script src="https://unpkg.com/d3-sankey@0"></script>
     <!-- <script src="//unpkg.com/d3fc@14.0.1"></script> -->
     <script src="graph.js"></script>
+
+    <script>
+        if(window.location.hash == '#light') {
+            document.body.classList.add('light');
+        }
+    </script>
 </body>
 
 </html>