如何检索存储在本地存储中的值？

Question

var checkboxValues = JSON.parse(localStorage.getItem('checkboxValues')) || {},
        $checkboxes = $("#list :checkbox");

    $checkboxes.on("change", function(){
        $checkboxes.each(function(){
            checkboxValues[this.id] = this.checked;
        });
        localStorage.setItem("checkboxValues", JSON.stringify(checkboxValues));
    });

I am using the code above to store the data into local storage.

{"2":false,"3":false,"4":true}

The data stored in the local storage. How can i get only the value 2 or false? I want to collect the data in the local storage and stored into an array during submit the form.

var items=[];
$.each(checkboxValues, function(key, value) {
            if(value===true){
                $("#" + key).prop('checked', value);
                items.push(key);
            }
        });

The code seem like got problem during submit which caused integrity constraint duplicate entry when store the data to database. I am using ajax to post the data to server and store the data. Is there anything wrong with my code?

Answer 1

Use the below code to access the checkboxValues object. You need to parse it.

var obj = JSON.parse(localStorage.getItem("checkboxValues"));

To access "2", use obj["2"] .

var obj = {"2":false,"3":false,"4":true};
localStorage.setItem('checkboxValues',JSON.stringify(obj));
var storedObject = JSON.parse(localStorage.getItem('checkboxValues'));
console.log(storedObject["2"]);