fix some typos

mock/utils.js

@@ -3,19 +3,21 @@
  * @returns {Object}
  */
 function param2Obj(url) {
-  const search = url.split('?')[1]
+  const search = decodeURIComponent(url.split('?')[1]).replace(/\+/g, ' ')
   if (!search) {
     return {}
   }
-  return JSON.parse(
-    '{"' +
-      decodeURIComponent(search)
-        .replace(/"/g, '\\"')
-        .replace(/&/g, '","')
-        .replace(/=/g, '":"')
-        .replace(/\+/g, ' ') +
-      '"}'
-  )
+  const obj = {}
+  const searchArr = search.split('&')
+  searchArr.forEach(v => {
+    const index = v.indexOf('=')
+    if (index !== -1) {
+      const name = v.substring(0, index)
+      const val = v.substring(index + 1, v.length)
+      obj[name] = val
+    }
+  })
+  return obj
 }
 
 /**