Also need stringify

Author: ndbroadbent

built/vendor/json-stringify-safe/stringify.js

@@ -0,0 +1,76 @@
+'use strict';
+
+/*
+ json-stringify-safe
+ Like JSON.stringify, but doesn't throw on circular references.
+
+ Copied from sentry-javascript/packages/raven-js/vendor/json-stringify-safe/stringify.js
+
+ Originally forked from https://github.com/isaacs/json-stringify-safe
+ version 5.0.1 on 3/8/2017 and modified to handle Errors serialization
+ and IE8 compatibility. Tests for this are in test/vendor.
+
+ ISC license: https://github.com/isaacs/json-stringify-safe/blob/master/LICENSE
+*/
+
+exports = module.exports = stringify;
+exports.getSerialize = serializer;
+
+function indexOf(haystack, needle) {
+  for (var i = 0; i < haystack.length; ++i) {
+    if (haystack[i] === needle) return i;
+  }
+  return -1;
+}
+
+function stringify(obj, replacer, spaces, cycleReplacer) {
+  return JSON.stringify(obj, serializer(replacer, cycleReplacer), spaces);
+}
+
+// https://github.com/ftlabs/js-abbreviate/blob/fa709e5f139e7770a71827b1893f22418097fbda/index.js#L95-L106
+function stringifyError(value) {
+  var err = {
+    // These properties are implemented as magical getters and don't show up in for in
+    stack: value.stack,
+    message: value.message,
+    name: value.name
+  };
+
+  for (var i in value) {
+    if (Object.prototype.hasOwnProperty.call(value, i)) {
+      err[i] = value[i];
+    }
+  }
+
+  return err;
+}
+
+function serializer(replacer, cycleReplacer) {
+  var stack = [];
+  var keys = [];
+
+  if (cycleReplacer == null) {
+    cycleReplacer = function cycleReplacer(key, value) {
+      if (stack[0] === value) {
+        return '[Circular ~]';
+      }
+      return '[Circular ~.' + keys.slice(0, indexOf(stack, value)).join('.') + ']';
+    };
+  }
+
+  return function (key, value) {
+    if (stack.length > 0) {
+      var thisPos = indexOf(stack, this);
+      ~thisPos ? stack.splice(thisPos + 1) : stack.push(this);
+      ~thisPos ? keys.splice(thisPos, Infinity, key) : keys.push(key);
+
+      if (~indexOf(stack, value)) {
+        value = cycleReplacer.call(this, key, value);
+      }
+    } else {
+      stack.push(value);
+    }
+
+    return replacer == null ? value instanceof Error ? stringifyError(value) : value : replacer.call(this, key, value);
+  };
+}

package.json

@@ -8,7 +8,7 @@
     "tdd": "jest --watch",
     "test": "jest --coverage --collectCoverageFrom=index.js && npm run lint",
     "lint": "eslint .",
-    "build": "babel index.js --out-dir built/",
+    "build": "babel index.js vendor/json-stringify-safe/stringify.js --out-dir built/",
     "prepublishOnly": "npm run test && npm run build",
     "serve-example": "webpack-dev-server --watch --config=example/webpack.config.js"
   },