Get Page Properties using JSOM

GetPageProperties.js

var context = SP.ClientContext.get_current();
var web = context.get_web(); 
var currentList = web.get_lists().getById(_spPageContextInfo.pageListId); 
var currentListItem = currentList.getItemById(_spPageContextInfo.pageItemId);
context.load(currentListItem);
context.executeQueryAsync(
  function(){
    console.log('Success')  
    console.log(currentListItem)
    console.log(currentListItem.get_item('PropertyName'))
  }, 
  function(){
    console.log('Error')
  }
);