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              <main>
  <h1>JSON-Powered Responsive Table with Semantics Retained by ARIA</h1>
  <p>
    A variation on the previous example, using vanilla JavaScript to construct the table from a pile of JSON.
  </p>

  <div id="BookTable" role="region" aria-labelledby="BookTableCaption" tabindex="0">
    <p>
      The JSON is probably invalid or the script that parses it is broken. Either way, my fault.
    </p>
  </div>

  <p>
    Note that this is an <em>accessible</em> (keyboard and screen reader) responsive (width and print) table generated with vanilla JavaScript from a pile of JSON. It retains table semantics for screen readers thanks to the liberal application of ARIA roles. You can <a href="http://adrianroselli.com/2018/04/tables-json-css-aria-rwd-tlas.html">read more at my site</a>.
  </p>
</main>
            
          
!
            
              @import url("https://fonts.googleapis.com/css?family=Lato:400,400i,700");

body {
  background-color: #6d695c;
  background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAACVBMVEUAAAAAAAAAAACDY+nAAAAAA3RSTlMmDQBzGIDBAAAAG0lEQVR42uXIIQEAAADCMHj/0NdkQMws0HEeAqvwAUGJthrXAAAAAElFTkSuQmCC);
  font-size: 100%;
  color: #333;
  font-family: Lato, Arial, sans-serif;
  padding: 0;
  margin: 0;
}

main {
  display: block;
  box-sizing: border-box;
  width: auto;
  padding: 1em 2vw;
  margin: 1em 2vw;
  color: #000;
  background-color: rgba(204, 204, 204, 0.7);
  border: 0.07em solid rgba(0, 0, 0, 0.5);
  border-radius: 0.5em;
}

table {
  margin: 1em 0;
  border-collapse: collapse;
/*   width: 100%; */
}

caption {
  text-align: left;
  font-style: italic;
  padding: 0.25em 0.5em 0.5em 0.5em;
}

th,
td {
  padding: 0.25em 0.5em 0.25em 1em;
  vertical-align: text-top;
  text-align: left;
  text-indent: -0.5em;
}

th {
  vertical-align: bottom;
  background-color: rgba(0, 0, 0, 0.5);
  color: #fff;
  font-weight: bold;
}

td::before {
  display: none;
}

tr:nth-child(even) {
  background-color: rgba(255, 255, 255, 0.25);
}

tr:nth-child(odd) {
  background-color: rgba(255, 255, 255, 0.5);
}

td:nth-of-type(2) {
  font-style: italic;
}

th:nth-of-type(3),
td:nth-of-type(3) {
  text-align: right;
}

div {
  overflow: auto;
}

@media screen and (max-width: 37em), print and (max-width: 5in) {
  table,
  tr,
  td {
    display: block;
  }
  tr {
    padding: 0.7em 2vw;
  }
  th,
  tr:first-of-type {
    display: none;
  }
  td::before {
    display: inline;
    font-weight: bold;
  }
  td {
    display: grid;
    grid-template-columns: 4em auto;
    grid-gap: 1em 0.5em;
  }
  caption {
    font-style: normal;
    background-color: rgba(0, 0, 0, 0.35);
    color: #fff;
    font-weight: bold;
  }
  td:nth-of-type(3) {
    text-align: left;
  }
  td:nth-of-type(4), td:nth-of-type(5) {
    text-align: right;
    width: 12em;
  }
  td:nth-of-type(4)::before, td:nth-of-type(5)::before {
    text-align: left;
  }
  td:nth-of-type(2)::before {
    font-style: normal;
  }
}

@media print {
  body {
    font-size: 6pt;
    color: #000;
    background-color: #fff;
    background-image: none;
  }
  body,
  main {
    margin: 0;
    padding: 0;
    background-color: #fff;
    border: none;
  }
  table {
    page-break-inside: avoid;
  }
  div {
    overflow: visible;
  }
  th {
    color: #000;
    background-color: #fff;
    border-bottom: 1pt solid #000;
  }
  tr {
    border-top: 1pt solid #000;
  }
}

@media print and (max-width: 5in) {
  caption {
    color: #000;
    background-color: #fff;
    border-bottom: 1pt solid #000;
  }
  table {
    page-break-inside: auto;
  }
  tr {
    page-break-inside: avoid;
  }
}

button {
  font-size: 90%;
  font-family: Lato, Arial, sans-serif;
  color: #fff;
  background-color: #00c;
  border: .1em solid #00f;
  border-radius: .5em;
  font-weight: bold;
  padding: .5em;
  text-align: center;
  box-shadow: .25em .25em .5em rgba(0, 0, 0, .5);
}

button[disabled] {
  background-color: #ccc;
  border-color: #ccc;
  color: #666;
}

button:not([disabled]):focus,
button:not([disabled]):hover {
  color: #00f;
  background-color: #fff;
  outline: 0;
}

button:active {
  box-shadow: 0 0 .5em rgba(0, 0, 0, .5);
}

            
          
!
            
              // Verify the JSON is JSON
// https://jsonformatter.curiousconcept.com/
// Minify the JSON for use below
// https://www.cleancss.com/json-minify/
// Minify the HTML node
// https://www.willpeavy.com/minifier/
// Escape the HTML for the JSON
// https://www.freeformatter.com/json-escape.html
var tableData =
  '{"items":[{"table":"BooksJSON","caption":"Books I May or May Not Have Read","row":[{"Author":"Miguel De Cervantes","Title":"The Ingenious Gentleman Don Quixote of La Mancha","Year":"1605","ISBN-13":"9783125798502","ISBN-10":"3125798507"},{"Author":"Mary Shelley","Title":"Frankenstein; or, The Modern Prometheus","Year":"1818","ISBN-13":"9781530278442","ISBN-10":"1530278449"},{"Author":"Herman Melville","Title":"Moby-Dick; or, The Whale","Year":"1851","ISBN-13":"9781530697908","ISBN-10":"1530697905"},{"Author":"Emma Dorothy Eliza Nevitte Southworth","Title":"The Hidden Hand","Year":"1888","ISBN-13":"9780813512969","ISBN-10":"0813512964"},{"Author":"F. Scott Fitzgerald","Title":"The Great Gatsby","Year":"1925","ISBN-13":"9780743273565","ISBN-10":"0743273567"},{"Author":"George Orwell","Title":"Nineteen Eighty-Four","Year":"1948","ISBN-13":"9780451524935","ISBN-10":"0451524934"}]}]}';

function ParseJSON(data, elmID, nodeType) {
  try {
    var JSONdata = JSON.parse(data);

    var divContainer = document.getElementById(elmID);
    divContainer.innerHTML = "";

    var filteredNodes = JSONdata.items;

    for (var a = 0; a < filteredNodes.length; a++) {
      var json = filteredNodes[a];
      if (json.table === nodeType) {

        // data grid
        if (json.caption !== undefined && json.row !== undefined) {
          var table = document.createElement("table");
          var caption = document.createElement("caption");
          caption.innerHTML = json.caption;
          caption.setAttribute('id', elmID+'Caption');
          table.appendChild(caption);
          table.setAttribute('id', json.table);
          table.setAttribute('role','table');

          var tableHead = Object.keys(json.row[0]);
          var tableRows = Object.values(json.row);

          var tr = table.insertRow(-1);
          tr.setAttribute('role','row');
          for (var i = 0; i < tableHead.length; i++) {
            var th = document.createElement("th");
            th.setAttribute('role','columnheader');
            th.innerHTML = tableHead[i];
            tr.appendChild(th);
          }

          for (var j = 0; j < tableRows.length; j++) {
            var tableCells = Object.values(json.row[j]);
            var tr = table.insertRow(-1);
            tr.setAttribute('role','row');
            for (var k = 0; k < tableCells.length; k++) {
              var tabCell = tr.insertCell(-1);
              tabCell.setAttribute('role','cell');
              tabCell.innerHTML = tableCells[k];
            }
          }
        }

        // build it
        if (json.caption !== undefined && json.row !== undefined) {
          divContainer.appendChild(table);          
        }
      }
    }
  } catch (e) {
    console.log("ParseJSON(): " + e);
  }
}

function ResponsiveCellHeaders(elmID) {
  try {
    var THarray = [];
    var table = document.getElementById(elmID);
    var ths = table.getElementsByTagName("th");
    for (var i = 0; i < ths.length; i++) {
      var headingText = ths[i].innerHTML;
      THarray.push(headingText);
    }
    var styleElm = document.createElement("style"),
      styleSheet;
    document.head.appendChild(styleElm);
    styleSheet = styleElm.sheet;
    for (var i = 0; i < THarray.length; i++) {
      styleSheet.insertRule(
        "#" +
          elmID +
          " td:nth-child(" +
          (i + 1) +
          ')::before {content:"' +
          THarray[i] +
          ': ";}',
        styleSheet.cssRules.length
      );
    }
  } catch (e) {
    console.log("ResponsiveCellHeaders(): " + e);
  }
}

ParseJSON(tableData, "BookTable", "BooksJSON");
ResponsiveCellHeaders('BooksJSON');
            
          
!
999px
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