问从localStorage中删除记录时从数组中删除元素

EN

var jpxun = JSON.parse(localStorage.getItem('jpxun')) || [];

if (jpxun) {
    var jpxun_length = jpxun.length;
} else {
    var jpxun_length = 0;
}

var hst = document.getElementById("usernames");

var MyUsernames = JSON.parse(localStorage.getItem("jpxun"));

if (jpxun_length > 0) {

    // declare array to hold items for outputting later in plain text format
    var plain_text_array = [];

    for (var i = 0; i < MyUsernames.length; i++) {

        var un1 = MyUsernames[i].name;

        hst.innerHTML += "<li>" +"<a id="+MyUsernames[i].id + " href='#content' onclick='deleteById(this)'>x </a>" + un1 + "</li>";

        // add word to plain text array
        plain_text_array.push(un1);

    }

}

var deleteById = function ( self ){

  MyUsernames = MyUsernames.filter(function(elem) {
      return elem.id !== self.id;
  });
          
  localStorage.setItem("jpxun",JSON.stringify(MyUsernames));
  
  self.parentNode.parentNode.removeChild(self.parentNode);
  
}