Format dates as ISO 8601. Fixes #41.

d3 · Feb 7, 2019 · 30be739 · 30be739
1 parent c6b02ea
commit 30be739
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Showing 2 changed files with 10 additions and 4 deletions.
diff --git a/src/dsv.js b/src/dsv.js
@@ -112,10 +112,11 @@ export default function(delimiter) {
     return row.map(formatValue).join(delimiter);
   }
 
-  function formatValue(text) {
-    return text == null ? ""
-        : reFormat.test(text += "") ? "\"" + text.replace(/"/g, "\"\"") + "\""
-        : text;
+  function formatValue(value) {
+    return value == null ? ""
+        : value instanceof Date ? value.toJSON()
+        : reFormat.test(value += "") ? "\"" + value.replace(/"/g, "\"\"") + "\""
+        : value;
   }
 
   return {

diff --git a/test/csv-test.js b/test/csv-test.js
@@ -258,6 +258,11 @@ tape("csvFormat(array) takes an array of objects as input", function(test) {
   test.end();
 });
 
+tape("csvFormat(array) converts dates to ISO 8601", function(test) {
+  test.deepEqual(dsv.csvFormat([{date: new Date(Date.UTC(2018, 0, 1))}]), "date\n2018-01-01T00:00:00.000Z");
+  test.end();
+});
+
 tape("csvFormat(array) escapes field names and values containing delimiters", function(test) {
   test.deepEqual(dsv.csvFormat([{"foo,bar": true}]), "\"foo,bar\"\ntrue");
   test.deepEqual(dsv.csvFormat([{field: "foo,bar"}]), "field\n\"foo,bar\"");