localstorage Help With localstorage api

[pheaset]

hey guys

I'm currently after completing a tutorial at http://zenva.com . I have been working on my knowledge with phaser. anyways, after finishing the tutorial i decided to polish the game. I am new to the localstorage api and was looking for some help. 

here is my code for the highscore. it currenly doesnt work with localstorage and im not sure why. Any help is much appreciated

  init: function(score) {
    var score = score || 0;
    localStorage.setItem("score", this.highestScore);
this.highestScore = this.highestScore = localStorage.getItem("score");
this.highestScore = Math.max(score, this.highestScore);
if(this.highestScore === null)
{
  localStorage.setItem("score", "0")
this.highestScore = localStorage.getItem("score");
}
   },

Here is the full file. Just incase its needed

var SpaceHipster = SpaceHipster || {};

//title screen
SpaceHipster.MainMenu = function(){};

SpaceHipster.MainMenu.prototype = {
  init: function(score) {
    var score = score || 0;
    localStorage.setItem("score", this.highestScore);
this.highestScore = this.highestScore = localStorage.getItem("score");
this.highestScore = Math.max(score, this.highestScore);
if(this.highestScore === null)
{
  localStorage.setItem("score", "0")
this.highestScore = localStorage.getItem("score");
}
   },
  create: function() {
  	//show the space tile, repeated
    this.background = this.game.add.tileSprite(0, 0, this.game.width, this.game.height, 'space');

    //give it speed in x
    this.background.autoScroll(0, 10);

    //start game text
    var text = "Tap to begin";
    var style = { font: "30px Arial", fill: "#fff", align: "center" };
    var t = this.game.add.text(this.game.width/2, this.game.height/2, text, style);
    t.anchor.set(0.5);

    //highest score
    text = "Highest score: "+this.highestScore;
    style = { font: "15px Arial", fill: "#fff", align: "center" };

    var h = this.game.add.text(this.game.width/2, this.game.height/2 + 50, text, style);
    h.anchor.set(0.5);
  },
  update: function() {
    if(this.game.input.activePointer.justPressed()) {
      this.game.state.start('Game');
    }
  }
};

 

[Xesenix]

You probably stored something not numeric in localStorage and now get bad results like NaN?

If that is the case try this:

init(score) {
  score = isNaN(score) ? 0 : score;
  this.highestScore = Number(localStorage.getItem("score"));
  this.highestScore = isNaN(this.highestScore) ? score : Math.max(score, Number(this.highestScore));
  localStorage.setItem('score', this.highestScore);
  return this.highestScore;
}

 

[bruno_]

You can use your browser's developer tools (press F12) to inspect your local storage.

[pheaset]

18 hours ago, Xesenix said:

You probably stored something not numeric in localStorage and now get bad results like NaN?

If that is the case try this:

init(score) {
  score = isNaN(score) ? 0 : score;
  this.highestScore = Number(localStorage.getItem("score"));
  this.highestScore = isNaN(this.highestScore) ? score : Math.max(score, Number(this.highestScore));
  localStorage.setItem('score', this.highestScore);
  return this.highestScore;
}

 

 

17 hours ago, bruno_ said:

You can use your browser's developer tools (press F12) to inspect your local storage.

Thank you both for the help.