Bar graph added.

node_modules/d3-scale/src/ordinal.js

@@ -0,0 +1,46 @@
+import {initRange} from "./init.js";
+
+export const implicit = Symbol("implicit");
+
+export default function ordinal() {
+  var index = new Map(),
+      domain = [],
+      range = [],
+      unknown = implicit;
+
+  function scale(d) {
+    var key = d + "", i = index.get(key);
+    if (!i) {
+      if (unknown !== implicit) return unknown;
+      index.set(key, i = domain.push(d));
+    }
+    return range[(i - 1) % range.length];
+  }
+
+  scale.domain = function(_) {
+    if (!arguments.length) return domain.slice();
+    domain = [], index = new Map();
+    for (const value of _) {
+      const key = value + "";
+      if (index.has(key)) continue;
+      index.set(key, domain.push(value));
+    }
+    return scale;
+  };
+
+  scale.range = function(_) {
+    return arguments.length ? (range = Array.from(_), scale) : range.slice();
+  };
+
+  scale.unknown = function(_) {
+    return arguments.length ? (unknown = _, scale) : unknown;
+  };
+
+  scale.copy = function() {
+    return ordinal(domain, range).unknown(unknown);
+  };
+
+  initRange.apply(scale, arguments);
+
+  return scale;
+}