feat(subParsers/table): support for table alignment

Credits to [torcellite (Karthik Balakrishnan)](https://github.com/torcellite)

CREDITS.md

@@ -33,7 +33,11 @@ Credits
       Bug fixing and late maintainer
     * [Hannah Wolfe](https://github.com/ErisDS)<br/>
       Bug fixes
-    * [Alexandre Courtiol](https://github.com/acourtiol)
+    * [Alexandre Courtiol](https://github.com/acourtiol)<br/>
+      Bug fixes and build optimization
+    * [Karthik Balakrishnan](https://github.com/torcellite)<br/>
+      Support for table alignment
+      
 
   - Original Project
     * [John Gruber](http://daringfireball.net/projects/markdown/)<br/>

dist/showdown.js

@@ -17,7 +17,8 @@ var showdown = {},
       simplifiedAutoLink:        false,
       literalMidWordUnderscores: false,
       strikethrough:             false,
-      tables:                    false
+      tables:                    false,
+      tablesHeaderId:            false
     },
     globalOptions = JSON.parse(JSON.stringify(defaultOptions)); //clone default options out of laziness =P
 
@@ -2012,46 +2013,68 @@ showdown.subParser('tables', function (text, options, globals) {
   var table = function () {
 
     var tables = {},
-        style = 'text-align:left;',
         filter;
 
-    tables.th = function (header) {
-      if (header.trim() === '') {
+    tables.th = function (header, style) {
+      var id = '';
+      header = header.trim();
+      if (header === '') {
         return '';
       }
-      var id = header.trim().replace(/ /g, '_').toLowerCase();
-      return '<th id="' + id + '" style="' + style + '">' + header + '</th>';
+      if (options.tableHeaderId) {
+        id = ' id="' + header.replace(/ /g, '_').toLowerCase() + '"';
+      }
+      if (style.trim() === '') {
+        style = '';
+      } else {
+        style = ' style="' + style + '"';
+      }
+      return '<th' + id + style + '>' + header + '</th>';
     };
 
-    tables.td = function (cell) {
-      var subText = showdown.subParser('blockGamut')(cell, options, globals);
-      return '<td style="' + style + '">' + subText + '</td>';
+    tables.td = function (cell, style) {
+      var subText = showdown.subParser('spanGamut')(cell.trim(), options, globals);
+      if (style.trim() === '') {
+        style = '';
+      } else {
+        style = ' style="' + style + '"';
+      }
+      return '<td' + style + '>' + subText + '</td>';
     };
 
     tables.ths = function () {
       var out = '',
           i = 0,
-        hs = [].slice.apply(arguments);
+          hs = [].slice.apply(arguments[0]),
+          style = [].slice.apply(arguments[1]);
+
       for (i; i < hs.length; i += 1) {
-        out += tables.th(hs[i]) + '\n';
+        out += tables.th(hs[i], style[i]) + '\n';
       }
+
       return out;
     };
 
     tables.tds = function () {
-      var out = '', i = 0, ds = [].slice.apply(arguments);
+      var out = '',
+          i = 0,
+          ds = [].slice.apply(arguments[0]),
+          style = [].slice.apply(arguments[1]);
+
       for (i; i < ds.length; i += 1) {
-        out += tables.td(ds[i]) + '\n';
+        out += tables.td(ds[i], style[i]) + '\n';
       }
       return out;
     };
 
     tables.thead = function () {
       var out,
-        hs = [].slice.apply(arguments);
+          hs = [].slice.apply(arguments[0]),
+          style = [].slice.apply(arguments[1]);
+
       out = '<thead>\n';
       out += '<tr>\n';
-      out += tables.ths.apply(this, hs);
+      out += tables.ths.apply(this, [hs, style]);
       out += '</tr>\n';
       out += '</thead>\n';
       return out;
@@ -2059,9 +2082,11 @@ showdown.subParser('tables', function (text, options, globals) {
 
     tables.tr = function () {
       var out,
-        cs = [].slice.apply(arguments);
+        cs = [].slice.apply(arguments[0]),
+        style = [].slice.apply(arguments[1]);
+
       out = '<tr>\n';
-      out += tables.tds.apply(this, cs);
+      out += tables.tds.apply(this, [cs, style]);
       out += '</tr>\n';
       return out;
     };
@@ -2072,15 +2097,44 @@ showdown.subParser('tables', function (text, options, globals) {
         line,
         hs,
         out = [];
+
       for (i; i < lines.length; i += 1) {
         line = lines[i];
         // looks like a table heading
         if (line.trim().match(/^[|].*[|]$/)) {
           line = line.trim();
-          var tbl = [];
+
+          var tbl = [],
+              align = lines[i + 1].trim(),
+              styles = [],
+              j = 0;
+
+          if (align.match(/^[|][-=|: ]+[|]$/)) {
+            styles = align.substring(1, align.length - 1).split('|');
+            for (j = 0; j < styles.length; ++j) {
+              styles[j] = styles[j].trim();
+              if (styles[j].match(/^[:][-=| ]+[:]$/)) {
+                styles[j] = 'text-align:center;';
+
+              } else if (styles[j].match(/^[-=| ]+[:]$/)) {
+                styles[j] = 'text-align:right;';
+
+              } else if (styles[j].match(/^[:][-=| ]+$/)) {
+                styles[j] = 'text-align:left;';
+              } else {
+                styles[j] = '';
+              }
+            }
+          }
           tbl.push('<table>');
           hs = line.substring(1, line.length - 1).split('|');
-          tbl.push(tables.thead.apply(this, hs));
+
+          if (styles.length === 0) {
+            for (j = 0; j < hs.length; ++j) {
+              styles.push('text-align:left');
+            }
+          }
+          tbl.push(tables.thead.apply(this, [hs, styles]));
           line = lines[++i];
           if (!line.trim().match(/^[|][-=|: ]+[|]$/)) {
             // not a table rolling back
@@ -2090,7 +2144,7 @@ showdown.subParser('tables', function (text, options, globals) {
             tbl.push('<tbody>');
             while (line.trim().match(/^[|].*[|]$/)) {
               line = line.trim();
-              tbl.push(tables.tr.apply(this, line.substring(1, line.length - 1).split('|')));
+              tbl.push(tables.tr.apply(this, [line.substring(1, line.length - 1).split('|'), styles]));
               line = lines[++i];
             }
             tbl.push('</tbody>');

src/showdown.js

@@ -15,7 +15,8 @@ var showdown = {},
       simplifiedAutoLink:        false,
       literalMidWordUnderscores: false,
       strikethrough:             false,
-      tables:                    false
+      tables:                    false,
+      tablesHeaderId:            false
     },
     globalOptions = JSON.parse(JSON.stringify(defaultOptions)); //clone default options out of laziness =P
 

src/subParsers/tables.js

@@ -4,46 +4,68 @@ showdown.subParser('tables', function (text, options, globals) {
   var table = function () {
 
     var tables = {},
-        style = 'text-align:left;',
         filter;
 
-    tables.th = function (header) {
-      if (header.trim() === '') {
+    tables.th = function (header, style) {
+      var id = '';
+      header = header.trim();
+      if (header === '') {
         return '';
       }
-      var id = header.trim().replace(/ /g, '_').toLowerCase();
-      return '<th id="' + id + '" style="' + style + '">' + header + '</th>';
+      if (options.tableHeaderId) {
+        id = ' id="' + header.replace(/ /g, '_').toLowerCase() + '"';
+      }
+      if (style.trim() === '') {
+        style = '';
+      } else {
+        style = ' style="' + style + '"';
+      }
+      return '<th' + id + style + '>' + header + '</th>';
     };
 
-    tables.td = function (cell) {
-      var subText = showdown.subParser('blockGamut')(cell, options, globals);
-      return '<td style="' + style + '">' + subText + '</td>';
+    tables.td = function (cell, style) {
+      var subText = showdown.subParser('spanGamut')(cell.trim(), options, globals);
+      if (style.trim() === '') {
+        style = '';
+      } else {
+        style = ' style="' + style + '"';
+      }
+      return '<td' + style + '>' + subText + '</td>';
     };
 
     tables.ths = function () {
       var out = '',
           i = 0,
-        hs = [].slice.apply(arguments);
+          hs = [].slice.apply(arguments[0]),
+          style = [].slice.apply(arguments[1]);
+
       for (i; i < hs.length; i += 1) {
-        out += tables.th(hs[i]) + '\n';
+        out += tables.th(hs[i], style[i]) + '\n';
       }
+
       return out;
     };
 
     tables.tds = function () {
-      var out = '', i = 0, ds = [].slice.apply(arguments);
+      var out = '',
+          i = 0,
+          ds = [].slice.apply(arguments[0]),
+          style = [].slice.apply(arguments[1]);
+
       for (i; i < ds.length; i += 1) {
-        out += tables.td(ds[i]) + '\n';
+        out += tables.td(ds[i], style[i]) + '\n';
       }
       return out;
     };
 
     tables.thead = function () {
       var out,
-        hs = [].slice.apply(arguments);
+          hs = [].slice.apply(arguments[0]),
+          style = [].slice.apply(arguments[1]);
+
       out = '<thead>\n';
       out += '<tr>\n';
-      out += tables.ths.apply(this, hs);
+      out += tables.ths.apply(this, [hs, style]);
       out += '</tr>\n';
       out += '</thead>\n';
       return out;
@@ -51,9 +73,11 @@ showdown.subParser('tables', function (text, options, globals) {
 
     tables.tr = function () {
       var out,
-        cs = [].slice.apply(arguments);
+        cs = [].slice.apply(arguments[0]),
+        style = [].slice.apply(arguments[1]);
+
       out = '<tr>\n';
-      out += tables.tds.apply(this, cs);
+      out += tables.tds.apply(this, [cs, style]);
       out += '</tr>\n';
       return out;
     };
@@ -64,15 +88,44 @@ showdown.subParser('tables', function (text, options, globals) {
         line,
         hs,
         out = [];
+
       for (i; i < lines.length; i += 1) {
         line = lines[i];
         // looks like a table heading
         if (line.trim().match(/^[|].*[|]$/)) {
           line = line.trim();
-          var tbl = [];
+
+          var tbl = [],
+              align = lines[i + 1].trim(),
+              styles = [],
+              j = 0;
+
+          if (align.match(/^[|][-=|: ]+[|]$/)) {
+            styles = align.substring(1, align.length - 1).split('|');
+            for (j = 0; j < styles.length; ++j) {
+              styles[j] = styles[j].trim();
+              if (styles[j].match(/^[:][-=| ]+[:]$/)) {
+                styles[j] = 'text-align:center;';
+
+              } else if (styles[j].match(/^[-=| ]+[:]$/)) {
+                styles[j] = 'text-align:right;';
+
+              } else if (styles[j].match(/^[:][-=| ]+$/)) {
+                styles[j] = 'text-align:left;';
+              } else {
+                styles[j] = '';
+              }
+            }
+          }
           tbl.push('<table>');
           hs = line.substring(1, line.length - 1).split('|');
-          tbl.push(tables.thead.apply(this, hs));
+
+          if (styles.length === 0) {
+            for (j = 0; j < hs.length; ++j) {
+              styles.push('text-align:left');
+            }
+          }
+          tbl.push(tables.thead.apply(this, [hs, styles]));
           line = lines[++i];
           if (!line.trim().match(/^[|][-=|: ]+[|]$/)) {
             // not a table rolling back
@@ -82,7 +135,7 @@ showdown.subParser('tables', function (text, options, globals) {
             tbl.push('<tbody>');
             while (line.trim().match(/^[|].*[|]$/)) {
               line = line.trim();
-              tbl.push(tables.tr.apply(this, line.substring(1, line.length - 1).split('|')));
+              tbl.push(tables.tr.apply(this, [line.substring(1, line.length - 1).split('|'), styles]));
               line = lines[++i];
             }
             tbl.push('</tbody>');

test/features/tables/basic-alignment.html

@@ -1,20 +1,20 @@
 <table>
   <thead>
     <tr>
-      <th id="first_header" style="text-align:left;"> First Header  </th>
-      <th id="second_header" style="text-align:left;"> Second Header </th>
+      <th style="text-align:left;">First Header</th>
+      <th style="text-align:left;">Second Header</th>
     </tr>
   </thead>
 
   <tbody>
     <tr>
-      <td style="text-align:left;"><p>Row 1 Cell 1  </p></td>
-      <td style="text-align:left;"><p>Row 1 Cell 2  </p></td>
+      <td style="text-align:left;">Row 1 Cell 1</td>
+      <td style="text-align:left;">Row 1 Cell 2</td>
     </tr>
 
     <tr>
-      <td style="text-align:left;"><p>Row 2 Cell 1  </p></td>
-      <td style="text-align:left;"><p>Row 2 Cell 2  </p></td>
+      <td style="text-align:left;">Row 2 Cell 1</td>
+      <td style="text-align:left;">Row 2 Cell 2</td>
     </tr>
 
   </tbody>

test/features/tables/basic.html

@@ -1,20 +1,20 @@
 <table>
 <thead>
 <tr>
-<th id="first_header" style="text-align:left;"> First Header  </th>
-<th id="second_header" style="text-align:left;"> Second Header </th>
+<th>First Header</th>
+<th>Second Header</th>
 </tr>
 </thead>
 
 <tbody>
 <tr>
-<td style="text-align:left;"><p>Row 1 Cell 1  </p></td>
-<td style="text-align:left;"><p>Row 1 Cell 2  </p></td>
+<td>Row 1 Cell 1</td>
+<td>Row 1 Cell 2</td>
 </tr>
 
 <tr>
-<td style="text-align:left;"><p>Row 2 Cell 1  </p></td>
-<td style="text-align:left;"><p>Row 2 Cell 2  </p></td>
+<td>Row 2 Cell 1</td>
+<td>Row 2 Cell 2</td>
 </tr>
 
 </tbody>

test/features/tables/basic_with_header_ids.html

@@ -0,0 +1,21 @@
+<table>
+    <thead>
+    <tr>
+        <th id="first_header">First Header</th>
+        <th id="second_header">Second Header</th>
+    </tr>
+    </thead>
+
+    <tbody>
+    <tr>
+        <td>Row 1 Cell 1</td>
+        <td>Row 1 Cell 2</td>
+    </tr>
+
+    <tr>
+        <td>Row 2 Cell 1</td>
+        <td>Row 2 Cell 2</td>
+    </tr>
+
+    </tbody>
+</table>

test/features/tables/basic_with_header_ids.md

@@ -0,0 +1,4 @@
+| First Header  | Second Header |
+| ------------- | ------------- |
+| Row 1 Cell 1  | Row 1 Cell 2  |
+| Row 2 Cell 1  | Row 2 Cell 2  |

test/features/tables/large-table-with-allignments.html

@@ -0,0 +1,48 @@
+<table>
+    <thead>
+    <tr>
+        <th style="text-align:left;">First Header</th>
+        <th style="text-align:center;">Second Header</th>
+        <th style="text-align:right;">Third Header</th>
+        <th>Fourth Header</th>
+    </tr>
+    </thead>
+
+    <tbody>
+    <tr>
+        <td style="text-align:left;">Row 1 Cell 1</td>
+        <td style="text-align:center;">Row 1 Cell 2</td>
+        <td style="text-align:right;">Row 1 Cell 3</td>
+        <td>Row 1 Cell 4</td>
+    </tr>
+
+    <tr>
+        <td style="text-align:left;">Row 2 Cell 1</td>
+        <td style="text-align:center;">Row 2 Cell 2</td>
+        <td style="text-align:right;">Row 2 Cell 3</td>
+        <td>Row 2 Cell 4</td>
+    </tr>
+
+    <tr>
+        <td style="text-align:left;">Row 3 Cell 1</td>
+        <td style="text-align:center;">Row 3 Cell 2</td>
+        <td style="text-align:right;">Row 3 Cell 3</td>
+        <td>Row 3 Cell 4</td>
+    </tr>
+
+    <tr>
+        <td style="text-align:left;">Row 4 Cell 1</td>
+        <td style="text-align:center;">Row 4 Cell 2</td>
+        <td style="text-align:right;">Row 4 Cell 3</td>
+        <td>Row 4 Cell 4</td>
+    </tr>
+
+    <tr>
+        <td style="text-align:left;">Row 5 Cell 1</td>
+        <td style="text-align:center;">Row 5 Cell 2</td>
+        <td style="text-align:right;">Row 5 Cell 3</td>
+        <td>Row 5 Cell 4</td>
+    </tr>
+
+    </tbody>
+</table>

test/features/tables/large-table-with-allignments.md

@@ -0,0 +1,7 @@
+| First Header  | Second Header | Third Header  | Fourth Header |
+| :------------ |: ----------- :| ------------ :| ------------- |
+| Row 1 Cell 1  | Row 1 Cell 2  | Row 1 Cell 3  | Row 1 Cell 4  |
+| Row 2 Cell 1  | Row 2 Cell 2  | Row 2 Cell 3  | Row 2 Cell 4  |
+| Row 3 Cell 1  | Row 3 Cell 2  | Row 3 Cell 3  | Row 3 Cell 4  |
+| Row 4 Cell 1  | Row 4 Cell 2  | Row 4 Cell 3  | Row 4 Cell 4  |
+| Row 5 Cell 1  | Row 5 Cell 2  | Row 5 Cell 3  | Row 5 Cell 4  |

test/features/tables/large.html

@@ -1,47 +1,47 @@
 <table>
 <thead>
 <tr>
-<th id="first_header" style="text-align:left;"> First Header  </th>
-<th id="second_header" style="text-align:left;"> Second Header </th>
-<th id="third_header" style="text-align:left;"> Third Header  </th>
-<th id="fourth_header" style="text-align:left;"> Fourth Header </th>
+<th>First Header</th>
+<th>Second Header</th>
+<th>Third Header</th>
+<th>Fourth Header</th>
 </tr>
 </thead>
 
 <tbody>
 <tr>
-<td style="text-align:left;"><p>Row 1 Cell 1  </p></td>
-<td style="text-align:left;"><p>Row 1 Cell 2  </p></td>
-<td style="text-align:left;"><p>Row 1 Cell 3  </p></td>
-<td style="text-align:left;"><p>Row 1 Cell 4  </p></td>
+<td>Row 1 Cell 1</td>
+<td>Row 1 Cell 2</td>
+<td>Row 1 Cell 3</td>
+<td>Row 1 Cell 4</td>
 </tr>
 
 <tr>
-<td style="text-align:left;"><p>Row 2 Cell 1  </p></td>
-<td style="text-align:left;"><p>Row 2 Cell 2  </p></td>
-<td style="text-align:left;"><p>Row 2 Cell 3  </p></td>
-<td style="text-align:left;"><p>Row 2 Cell 4  </p></td>
+<td>Row 2 Cell 1</td>
+<td>Row 2 Cell 2</td>
+<td>Row 2 Cell 3</td>
+<td>Row 2 Cell 4</td>
 </tr>
 
 <tr>
-<td style="text-align:left;"><p>Row 3 Cell 1  </p></td>
-<td style="text-align:left;"><p>Row 3 Cell 2  </p></td>
-<td style="text-align:left;"><p>Row 3 Cell 3  </p></td>
-<td style="text-align:left;"><p>Row 3 Cell 4  </p></td>
+<td>Row 3 Cell 1</td>
+<td>Row 3 Cell 2</td>
+<td>Row 3 Cell 3</td>
+<td>Row 3 Cell 4</td>
 </tr>
 
 <tr>
-<td style="text-align:left;"><p>Row 4 Cell 1  </p></td>
-<td style="text-align:left;"><p>Row 4 Cell 2  </p></td>
-<td style="text-align:left;"><p>Row 4 Cell 3  </p></td>
-<td style="text-align:left;"><p>Row 4 Cell 4  </p></td>
+<td>Row 4 Cell 1</td>
+<td>Row 4 Cell 2</td>
+<td>Row 4 Cell 3</td>
+<td>Row 4 Cell 4</td>
 </tr>
 
 <tr>
-<td style="text-align:left;"><p>Row 5 Cell 1  </p></td>
-<td style="text-align:left;"><p>Row 5 Cell 2  </p></td>
-<td style="text-align:left;"><p>Row 5 Cell 3  </p></td>
-<td style="text-align:left;"><p>Row 5 Cell 4  </p></td>
+<td>Row 5 Cell 1</td>
+<td>Row 5 Cell 2</td>
+<td>Row 5 Cell 3</td>
+<td>Row 5 Cell 4</td>
 </tr>
 
 </tbody>

test/features/tables/mixed-alignment.html

@@ -0,0 +1,29 @@
+<table>
+  <thead>
+    <tr>
+      <th style="text-align:left;">Left-Aligned</th>
+      <th style="text-align:center;">Center-Aligned</th>
+      <th style="text-align:right;">Right-Aligned</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align:left;">col 3 is</td>
+      <td style="text-align:center;">some wordy paragraph</td>
+      <td style="text-align:right;">$1600</td>
+    </tr>
+
+    <tr>
+      <td style="text-align:left;">col 2 is</td>
+      <td style="text-align:center;">centered</td>
+      <td style="text-align:right;">$12</td>
+    </tr>
+
+    <tr>
+      <td style="text-align:left;">zebra stripes</td>
+      <td style="text-align:center;">are neat</td>
+      <td style="text-align:right;">$1</td>
+    </tr>
+
+  </tbody>
+</table>

test/features/tables/mixed-alignment.md

@@ -0,0 +1,5 @@
+| Left-Aligned  |    Center-Aligned    | Right-Aligned |
+| :------------ |:--------------------:| -------------:|
+| col 3 is      | some wordy paragraph |         $1600 |
+| col 2 is      |       centered       |           $12 |
+| zebra stripes |       are neat       |            $1 |

test/features/tables/multiple-tables.html

@@ -5,17 +5,17 @@
 <table>
     <thead>
     <tr>
-        <th id="header1" style="text-align:left;">header1    </th>
-        <th id="header2" style="text-align:left;">header2    </th>
-        <th id="header3" style="text-align:left;">header3</th>
+        <th>header1</th>
+        <th>header2</th>
+        <th>header3</th>
     </tr>
     </thead>
 
     <tbody>
     <tr>
-        <td style="text-align:left;"><p>Value1     </p></td>
-        <td style="text-align:left;"><p>Value2     </p></td>
-        <td style="text-align:left;"><p>Value3   </p></td>
+        <td>Value1</td>
+        <td>Value2</td>
+        <td>Value3</td>
     </tr>
 
     </tbody>
@@ -26,17 +26,17 @@
 <table>
     <thead>
     <tr>
-        <th id="headera" style="text-align:left;">headerA    </th>
-        <th id="headerb" style="text-align:left;">headerB    </th>
-        <th id="headerc" style="text-align:left;">headerC</th>
+        <th>headerA</th>
+        <th>headerB</th>
+        <th>headerC</th>
     </tr>
     </thead>
 
     <tbody>
     <tr>
-        <td style="text-align:left;"><p>ValueA     </p></td>
-        <td style="text-align:left;"><p>ValueB     </p></td>
-        <td style="text-align:left;"><p>ValueC   </p></td>
+        <td>ValueA</td>
+        <td>ValueB</td>
+        <td>ValueC</td>
     </tr>
 
     </tbody>

test/features/tables/with-equals.html

@@ -1,20 +1,20 @@
 <table>
 <thead>
 <tr>
-<th id="first_header" style="text-align:left;"> First Header  </th>
-<th id="second_header" style="text-align:left;"> Second Header </th>
+<th>First Header</th>
+<th>Second Header</th>
 </tr>
 </thead>
 
 <tbody>
 <tr>
-<td style="text-align:left;"><p>Row 1 Cell 1  </p></td>
-<td style="text-align:left;"><p>Row 1 Cell 2  </p></td>
+<td>Row 1 Cell 1</td>
+<td>Row 1 Cell 2</td>
 </tr>
 
 <tr>
-<td style="text-align:left;"><p>Row 2 Cell 1  </p></td>
-<td style="text-align:left;"><p>Row 2 Cell 2  </p></td>
+<td>Row 2 Cell 1</td>
+<td>Row 2 Cell 2</td>
 </tr>
 
 </tbody>

test/features/tables/with-surroundings.html

@@ -6,20 +6,20 @@ vulputate dictum. Vestibulum consequat ultricies nibh, sed tempus nisl mattis a.
 <table>
 <thead>
 <tr>
-<th id="first_header" style="text-align:left;"> First Header  </th>
-<th id="second_header" style="text-align:left;"> Second Header </th>
+<th>First Header</th>
+<th>Second Header</th>
 </tr>
 </thead>
 
 <tbody>
 <tr>
-<td style="text-align:left;"><p>Row 1 Cell 1  </p></td>
-<td style="text-align:left;"><p>Row 1 Cell 2  </p></td>
+<td>Row 1 Cell 1</td>
+<td>Row 1 Cell 2</td>
 </tr>
 
 <tr>
-<td style="text-align:left;"><p>Row 2 Cell 1  </p></td>
-<td style="text-align:left;"><p>Row 2 Cell 2  </p></td>
+<td>Row 2 Cell 1</td>
+<td>Row 2 Cell 2</td>
 </tr>
 
 </tbody>

test/features/tables/without-body.html

@@ -1,8 +1,8 @@
 <table>
 <thead>
 <tr>
-<th id="first_header" style="text-align:left;"> First Header  </th>
-<th id="second_header" style="text-align:left;"> Second Header </th>
+<th>First Header</th>
+<th>Second Header</th>
 </tr>
 </thead>
 

test/node/showdown.js

@@ -26,7 +26,8 @@ describe('showdown.options', function () {
         simplifiedAutoLink:        false,
         literalMidWordUnderscores: false,
         strikethrough:             false,
-        tables:                    false
+        tables:                    false,
+        tablesHeaderId:            false
       };
       expect(showdown.getDefaultOptions()).to.be.eql(opts);
     });

test/node/testsuite.features.js

@@ -28,8 +28,13 @@ describe('makeHtml() features testsuite', function () {
   }
 
   describe('table support', function () {
-    var converter = new showdown.Converter({tables: true});
+    var converter;
     for (var i = 0; i < tableSuite.length; ++i) {
+      if (tableSuite[i].name === 'basic_with_header_ids') {
+        converter = new showdown.Converter({tables: true, tableHeaderId: true});
+      } else {
+        converter = new showdown.Converter({tables: true});
+      }
       it(tableSuite[i].name, assertion(tableSuite[i], converter));
     }
   });