UnityEngine.PlayerPrefs wrapper for WebGL LocalStorage

FileIO.jslib

var FileIO = {

  SaveToLocalStorage : function(key, data) {
    localStorage.setItem(Pointer_stringify(key), Pointer_stringify(data));
  },

  LoadFromLocalStorage : function(key) {
    var returnStr = localStorage.getItem(Pointer_stringify(key));
    var bufferSize = lengthBytesUTF8(returnStr) + 1;
    var buffer = _malloc(bufferSize);
    stringToUTF8(returnStr, buffer, bufferSize);
    return buffer;
  },

  RemoveFromLocalStorage : function(key) {
    localStorage.removeItem(Pointer_stringify(key));
  },

  HasKeyInLocalStorage : function(key) {
    if (localStorage.getItem(Pointer_stringify(key))) {
      return 1;
    }
    else {
      return 0;
    }
  }
};

mergeInto(LibraryManager.library, FileIO);;

PlayerPrefs.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Linq;

namespace Jammer {

  /// <summary>
  /// UnityEngine.PlayerPrefs wrapper for WebGL LocalStorage
  /// </summary>
  public static class PlayerPrefs {

    public static void DeleteKey(string key) {
      Log.Debug(string.Format("Jammer.PlayerPrefs.DeleteKey(key: {0})", key));

      #if UNITY_WEBGL
        RemoveFromLocalStorage(key: key);
      #else
        UnityEngine.PlayerPrefs.DeleteKey(key: key);
      #endif
    }

    public static bool HasKey(string key) {
      Log.Debug(string.Format("Jammer.PlayerPrefs.HasKey(key: {0})", key));

      #if UNITY_WEBGL
        return (HasKeyInLocalStorage(key) == 1);
      #else
        return (UnityEngine.PlayerPrefs.HasKey(key: key));
      #endif
    }

    public static string GetString(string key) {
      Log.Debug(string.Format("Jammer.PlayerPrefs.GetString(key: {0})", key));

      #if UNITY_WEBGL
        return LoadFromLocalStorage(key: key);
      #else
        return (UnityEngine.PlayerPrefs.GetString(key: key));
      #endif
    }

    public static void SetString(string key, string value) {
      Log.Debug(string.Format("Jammer.PlayerPrefs.SetString(key: {0}, value: {1})", key, value));

      #if UNITY_WEBGL
        SaveToLocalStorage(key: key, value: value);
      #else
        UnityEngine.PlayerPrefs.SetString(key: key, value: value);
      #endif

    }

    public static void Save() {
      Log.Debug(string.Format("Jammer.PlayerPrefs.Save()"));

      #if !UNITY_WEBGL
        UnityEngine.PlayerPrefs.Save();
      #endif
    }

    #if UNITY_WEBGL
      [DllImport("__Internal")]
      private static extern void SaveToLocalStorage(string key, string value);

      [DllImport("__Internal")]
      private static extern string LoadFromLocalStorage(string key);

      [DllImport("__Internal")]
      private static extern void RemoveFromLocalStorage(string key);

      [DllImport("__Internal")]
      private static extern int HasKeyInLocalStorage(string key);
    #endif
  }
}