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HTML

              
                <head>
  <script src="https://brechtvdv.github.io/demo-data/comunica-logger.js"></script>
  <script src="https://brechtvdv.github.io/demo-data/comunica-browser.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/clusterize.js/0.18.0/clusterize.min.js"></script>
  <script src='//cdn.jsdelivr.net/npm/yasgui-yasqe@2.11.22/dist/yasqe.bundled.min.js'></script>

  <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/clusterize.js/0.18.0/clusterize.min.css">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.2/css/all.css" integrity="sha384-oS3vJWv+0UjzBfQzYUhtDYW+Pj2yciDJxpsK1OYPAYjqT085Qq/1cq5FLXAZQ7Ay" crossorigin="anonymous">
  <link rel="stylesheet" href="https://brechtvdv.github.io/demo-data/ldf-client.css">
  <link href='//cdn.jsdelivr.net/npm/yasgui-yasqe@2.11.22/dist/yasqe.min.css' rel='stylesheet' type='text/css'/>

</head>
<body>

<h2>View your website as a spreadsheet</h2>

<label for="url">Enter URL of a webpage containing JSON-LD snippets</label>
</br>
</br>
    <input type="text" name="url" id="urlInput" value="https://nieuwsvandegrooteoorlog.hetarchief.be/nl/media/le-bruxellois-journal-quotidien-ind%C3%A9pendant/zsYcSJRZZqIZlNsdSlk0dvuv"> 
<br/><br/>   

<div>
<button id="startbutton" onclick="fetchRecords()">Generate</button>
<div class="showquerytooltip" id="showquerytooltip">
  <span class="showquerytooltiptext">Show SPARQL query</span>
  <a id="showquerybutton" onclick="showquery()"><img src="https://brechtvdv.github.io/demo-data/sparql.png" alt="SPARQL" id="sparqlimg"></a>
</div>
  <i id="loader" class="fa fa-refresh fa-spin" style="font-size:24px"></i>
</div>

<div id="queryBlock">
  <br>
  <label for="query">Query</label>
  <br>
  <textarea id="query" rows="9" cols="100">
  SELECT * WHERE { 
    GRAPH ?document {
     ?newspaper a <http://schema.org/Newspaper> . 
     ?newspaper <http://schema.org/datePublished> ?datePublished . 
     ?newspaper <http://purl.org/dc/terms/title> ?title . 
     ?newspaper <http://schema.org/publisher> ?publisher . 
    }
  }
  </textarea>
</div>

<br> 
<label for="result">Spreadsheet (<span id="aantalVerwerkteRijen">0 records</span>, <span id="bestandsgrootte">0 Bytes</span>)</label> <div class="kopieertooltip" id="kopieertooltip"><button id="kopieerbutton" onclick="kopieer()"><span class="kopieertooltiptext">Copy to clipboard</span><i class="far fa-copy"></i></button></div>


<div id="scrollArea" class="clusterize-scroll">
  <div id="contentArea" class="clusterize-content">
  </div>
</div>

<label for="logs">Logs</label>
<div id="scrollAreaLogs" class="clusterize-scroll">
  <div id="contentAreaLogs" class="clusterize-content">
  </div>
</div>
 
</body>
              
            
!

CSS

              
                #loader {
      visibility: hidden;
    }

    #queryBlock {
      display: none;
      visibility: hidden;
    }

    #urlInput {
      width: 100%;
    }

    #bestandsgrootte::after, #aantalVerwerkteRijen::after {
      content: none;
    }
    #showquerybutton {
      float: right;
    }

    #sparqlimg {
      height: 25px;
    }

    .startbutton {
      float: left;
    }

    .kopieertooltip, .showquerytooltip, #startbutton {
      position: relative;
      display: inline-block;
    }

    .kopieertooltip {
        visibility: hidden;
        float: right;
        margin-left: 10px;
        margin-bottom: 10px;
    }

    .kopieertooltiptext {
      top: -5px;
      right: 105%;
    }

    .showquerytooltip {
      vertical-align: middle;
    }

    .showquerytooltiptext {
      top: -5px;
      left: 105%; 
    }

    .kopieertooltiptext, .showquerytooltiptext {
      visibility: hidden;
      width: 150px;
      background-color: black;
      color: #fff;
      text-align: center;
      border-radius: 6px;
      padding: 5px 0;
      
      /* Position the tooltip */
      position: absolute;
      z-index: 1;
    }

    .kopieertooltip:hover .kopieertooltiptext, .showquerytooltiptext:hover .showquerytooltiptext {
      visibility: visible;
    }

    .showquerytooltip:hover .showquerytooltiptext {
      visibility: visible;
    }

    #scrollArea {
      height: 23.5em;
      font-size: 10pt;
      margin: .5em 0 1em;
      position: relative;
      overflow: scroll; 
      width: 100%;
    }

    #scrollAreaLogs {
      color: #666;
      height: 6.3em;
      font-size: 9pt;
      line-height: 1.6;
      margin: .5em -999999px 1em 0;
      position: relative;
      overflow: scroll; 
      width: 100%;
    }
    
              
            
!

JS

              
                	let aantalVerwerkteRijen = 0;
let bestandsgrootte = 0;
let data = '';

let clusterize = new Clusterize({
    scrollId: 'scrollArea',
    contentId: 'contentArea'
  });

let clusterizeLogs = new Clusterize({
    scrollId: 'scrollAreaLogs',
    contentId: 'contentAreaLogs'
  });

function kopieer() {
  navigator.clipboard.writeText(data)
    .then(() => {
      console.log('Text copied.');
    })
    .catch(() => {
      console.log('Failed to copy text.');
    });
}

function updateView(res) {
  if (!data) {
        Object.keys(res).forEach((key) => {
          data += key.replace('?', '') + ',';
        });
        data = data.substring(0, data.length - 1); // remove trailing comma
        clusterize.append(['<div>' + data + '</div>']);
        data += '\n';
      } 
        aantalVerwerkteRijen++;
        document.getElementById("aantalVerwerkteRijen").innerHTML = aantalVerwerkteRijen;
        if (aantalVerwerkteRijen === 1) document.getElementById("aantalVerwerkteRijen").innerHTML += " record";
        else document.getElementById("aantalVerwerkteRijen").innerHTML += " records";
        let row = '';
        Object.keys(res).forEach((key) => {
          row += res[key].value + ',';
        });
        row = row.substring(0, row.length - 1); // remove trailing comma
        data += row + '\n';
        clusterize.append(['<div>' + row + '</div>']);

        bestandsgrootte += byteCount(row);
        document.getElementById("bestandsgrootte").innerHTML = formatBytes(bestandsgrootte, 2);
}
  
function byteCount(s) {
    return encodeURI(s).split(/%..|./).length - 1;
}

function fetchRecords() {
  const url = document.getElementById('urlInput').value;
  
  data = '';
  aantalVerwerkteRijen = 0;
  bestandsgrootte = 0;
 // document.getElementById("result").innerHTML = ''';

  //check if url is filled
  if (url.length != 0) {    
    document.getElementById("loader").style.visibility = 'visible';
    const query = document.getElementById("query").value;

    window.logger.log = function (level, message, data) {
      // Only keep Requesting logs
      if (message.indexOf('Requesting') != -1) {
        let log = message + '\n';
        // Add to UI
        clusterizeLogs.append(['<div>' + log + '</div>']);
      }
    };
    const myEngine = Comunica.newEngine();
    myEngine.query(query,
  { sources: [ { type: 'hypermedia', value: url } ], log: window.logger })
  .then(function (result) {
    result.bindingsStream.on('data', function (data) {
      const res = data.toObject();
      updateView(res);
      });
    result.bindingsStream.on('end', function () {
      document.getElementById("loader").style.visibility = 'hidden';
      if (!data.length) {
                clusterize.append(['<div>' + "Geen data gevonden." + '</div>']);
      }
    });
    });

    document.getElementById("kopieertooltip").style = 'visibility: visible';

  } else {
    console.log("no url provided");
  }
}

function formatBytes(a,b){if(0==a)return"0 Bytes";var c=1024,d=b||2,e=["Bytes","KB","MB","GB","TB","PB","EB","ZB","YB"],f=Math.floor(Math.log(a)/Math.log(c));return parseFloat((a/Math.pow(c,f)).toFixed(d))+" "+e[f]}
  
function showquery() {
  if (document.getElementById('queryBlock').style.display === '') {
    document.getElementById('queryBlock').style.display = 'inline';
    new YASQE.fromTextArea(document.getElementById('query'))
    document.getElementById('queryBlock').style.visibility = 'visible';
  }
  else if (document.getElementById('queryBlock').style.display === 'none') {
    document.getElementById('queryBlock').style.display = 'inline';
    document.getElementById('queryBlock').style.visibility = 'visible';
  } else {
    document.getElementById('queryBlock').style.display = 'none';
    document.getElementById('queryBlock').style.visibility = 'hidden';
  }
}
              
            
!
999px

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