Add browser-support (#75)

Author: danivek

lib/JSONAPISerializer.js

@@ -1,3 +1,5 @@
+require('setimmediate');
+
 const {
   pick,
   isEmpty,

lib/helpers.js

@@ -1,15 +1,6 @@
-const {
-  pick,
-  isEmpty,
-  omit,
-  isPlainObject,
-  isObjectLike,
-  transform,
-  toKebabCase,
-  toSnakeCase,
-  toCamelCase,
-} = require('30-seconds-of-code');
-const set = require('lodash.set');
+/* eslint-disable no-sequences */
+/* eslint-disable no-return-assign */
+
 const LRU = require('./lru-cache');
 
 // https://github.com/you-dont-need/You-Dont-Need-Lodash-Underscore#_get
@@ -21,6 +12,80 @@ const get = (obj, path, defaultValue) => {
   return result === undefined || result === obj ? defaultValue : result;
 };
 
+// https://stackoverflow.com/questions/54733539/javascript-implementation-of-lodash-set-method
+const set = (obj, path, value) => {
+  if (Object(obj) !== obj) return obj; // When obj is not an object
+  // If not yet an array, get the keys from the string-path
+  if (!Array.isArray(path)) path = path.toString().match(/[^.[\]]+/g) || [];
+  path.slice(0, -1).reduce(
+    (
+      a,
+      c,
+      i // Iterate all of them except the last one
+    ) =>
+      Object(a[c]) === a[c] // Does the key exist and is its value an object?
+        ? // Yes: then follow that path
+          a[c]
+        : // No: create the key. Is the next key a potential array-index?
+          (a[c] =
+            // eslint-disable-next-line no-bitwise
+            Math.abs(path[i + 1]) >> 0 === +path[i + 1]
+              ? [] // Yes: assign a new array object
+              : {}), // No: assign a new plain object
+    obj
+  )[path[path.length - 1]] = value; // Finally assign the value to the last key
+  return obj; // Return the top-level object to allow chaining
+};
+
+// https://github.com/30-seconds/30-seconds-of-code/blob/master/snippets/pick.md
+const pick = (obj, arr) =>
+  arr.reduce((acc, curr) => (curr in obj && (acc[curr] = obj[curr]), acc), {});
+
+// https://github.com/30-seconds/30-seconds-of-code/blob/master/snippets/isEmpty.md
+const isEmpty = (val) => val == null || !(Object.keys(val) || val).length;
+
+// https://github.com/30-seconds/30-seconds-of-code/blob/master/snippets/omit.md
+const omit = (obj, arr) =>
+  Object.keys(obj)
+    .filter((k) => !arr.includes(k))
+    .reduce((acc, key) => ((acc[key] = obj[key]), acc), {});
+
+// https://github.com/30-seconds/30-seconds-of-code/blob/master/snippets/isObjectLike.md
+const isObjectLike = (val) => val !== null && typeof val === 'object';
+
+// https://github.com/30-seconds/30-seconds-of-code/blob/master/snippets/isPlainObject.md
+const isPlainObject = (val) => !!val && typeof val === 'object' && val.constructor === Object;
+
+// https://github.com/30-seconds/30-seconds-of-code/blob/master/snippets/transform.md
+const transform = (obj, fn, acc) => Object.keys(obj).reduce((a, k) => fn(a, obj[k], k, obj), acc);
+
+// https://github.com/30-seconds/30-seconds-of-code/blob/master/snippets/toKebabCase.md
+const toKebabCase = (str) =>
+  str &&
+  str
+    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
+    .map((x) => x.toLowerCase())
+    .join('-');
+
+// https://github.com/30-seconds/30-seconds-of-code/blob/master/snippets/toSnakeCase.md
+const toSnakeCase = (str) =>
+  str &&
+  str
+    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
+    .map((x) => x.toLowerCase())
+    .join('_');
+
+// https://github.com/30-seconds/30-seconds-of-code/blob/master/snippets/toCamelCase.md
+const toCamelCase = (str) => {
+  const s =
+    str &&
+    str
+      .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
+      .map((x) => x.slice(0, 1).toUpperCase() + x.slice(1).toLowerCase())
+      .join('');
+  return s.slice(0, 1).toLowerCase() + s.slice(1);
+};
+
 module.exports = {
   get,
   set,