jquery - Making an Array Variable Global in JavaScript -

i'm setting array variable 0 on load of javascript.

var postarray= new array(); 

however, used array hold objects retrieve localstorage. works when upload more blog posts entered localstorage , displays. however, after refresh page called again empty array , go enter 3rd blog post after i've refreshed, localstorage set having contents of postarray. therefore, i'm clearing out localstorage when dont want to.

if throw if statement, postarray undefined.

if (localstorage.getitem("posts") === null) {     var postarray = new array();  } 

i'm trying make postarray global @ start yet create new array when localstorage empty.

you should content localstorage, , if it's empty, return empty array.

for example.

var postarray= getposts();  function getposts() {   var posts = localstorage.getitem("posts");   return posts ? json.parse(posts) : []; }