first implementation

frontend/node_modules/axios/lib/helpers/buildURL.js

@@ -0,0 +1,66 @@
+'use strict';
+
+import utils from '../utils.js';
+import AxiosURLSearchParams from '../helpers/AxiosURLSearchParams.js';
+
+/**
+ * It replaces URL-encoded forms of `:`, `$`, `,`, and spaces with
+ * their plain counterparts (`:`, `$`, `,`, `+`).
+ *
+ * @param {string} val The value to be encoded.
+ *
+ * @returns {string} The encoded value.
+ */
+function encode(val) {
+  return encodeURIComponent(val)
+    .replace(/%3A/gi, ':')
+    .replace(/%24/g, '$')
+    .replace(/%2C/gi, ',')
+    .replace(/%20/g, '+');
+}
+
+/**
+ * Build a URL by appending params to the end
+ *
+ * @param {string} url The base of the url (e.g., http://www.google.com)
+ * @param {object} [params] The params to be appended
+ * @param {?(object|Function)} options
+ *
+ * @returns {string} The formatted url
+ */
+export default function buildURL(url, params, options) {
+  if (!params) {
+    return url;
+  }
+
+  const _encode = (options && options.encode) || encode;
+
+  const _options = utils.isFunction(options)
+    ? {
+        serialize: options,
+      }
+    : options;
+
+  const serializeFn = _options && _options.serialize;
+
+  let serializedParams;
+
+  if (serializeFn) {
+    serializedParams = serializeFn(params, _options);
+  } else {
+    serializedParams = utils.isURLSearchParams(params)
+      ? params.toString()
+      : new AxiosURLSearchParams(params, _options).toString(_encode);
+  }
+
+  if (serializedParams) {
+    const hashmarkIndex = url.indexOf('#');
+
+    if (hashmarkIndex !== -1) {
+      url = url.slice(0, hashmarkIndex);
+    }
+    url += (url.indexOf('?') === -1 ? '?' : '&') + serializedParams;
+  }
+
+  return url;
+}