Create bookmarklet.js

Author: GSam

NZX/bookmarklet.js

@@ -0,0 +1,34 @@
+{
+    var table = document.querySelector('.table-to-list.instruments-table > tbody');
+    let total_value = 0.0;
+    let total_prev_value = 0.0;
+    for (var i = 0, row; row = table.rows[i]; i++) {
+        let v = '';
+        let price = row.querySelector('td[data-title=Price]');
+        let change = row.querySelector('td[data-title=Change]');
+        let quantity = row.querySelector('td[data-title=Quantity]');
+        let oldprice = price.textContent.trim().replace('$', '') - parseFloat(change.textContent.split('/')[0].trim().replace('$', ''));
+        let oldquant = parseInt(quantity.textContent.trim()) * oldprice;
+
+        total_prev_value += oldquant;
+        total_value += parseFloat(price.textContent.trim().replace('$', '')) * parseInt(quantity.textContent.trim());
+    }
+    let newrow = table.insertRow(-1);
+    let cell = newrow.insertCell(-1);
+    cell.setAttribute('class', 'text-center');
+    cell.innerHTML = "<strong>Total</strong>";
+    cell = newrow.insertCell(-1);
+    cell = newrow.insertCell(-1);
+    cell = newrow.insertCell(-1);
+    cell = newrow.insertCell(-1);
+    cell.classList.add('text-right');
+    if (total_value - total_prev_value > 0) {
+        cell.classList.add('up');
+    } else {
+        cell.classList.add('down');
+    };
+    cell.innerHTML = '$' + (total_value - total_prev_value).toFixed(3) + " / " + ((total_value - total_prev_value) * 100 / total_prev_value).toFixed(3) + '%';
+    cell = newrow.insertCell(-1);
+    cell.setAttribute('class', 'text-right');
+    cell.innerHTML = '$' + total_value;
+}