javascript - 有没有一种方法可以将对象从一个本地存储传输到另一个本地存储？

Question

我正在尝试根据是否选中表中的复选框将对象从一个本地存储移动到另一个本地存储。

    // version 1.0
    // Developer 
    // Date: Tuesday December 29th 2015
    // Registeration for Cars and stuff as well as table to retreive the Car information

    var Car = [];

    function carReg(storagekey) {
        alert('submitted');
        "use strict";

    // checks localstorage to see if there are already values and then keeps those values rather than deleteing them
        //Car = JSON.parse(localStorage.getitem(storagekey));
        //  if (Car == null) {
        //      Car = [];
        //  }
    // push all of the data into localStorage under the specific variable id's
        Car.push({
            Brand: document.getElementById("mySelect").value,
            Model: document.getElementById("selectModel").value,
            Age: document.getElementById("carAge").value,
            KM: document.getElementById("km").value,
            Name: document.getElementById("name").value,
            ContactInfo: document.getElementById("cInfo").value,
        })
    // stores everthing into local storage under the specified key
        localStorage.setItem(storagekey, JSON.stringify(Car))

    }

    /////////////////////////////
    /// Table Code starts here//
    ///////////////////////////

    function maketable() {

    // get data from localStorage
        var carReg = JSON.parse(localStorage.getItem("register"))

    // Variables for the table values and classifications
        var table, row, cell1, cell2, cell3, cell4, cell5, cell6;
        table = document.getElementById('ownedCar')

    // Row definers
        for (var index = 0; index < carReg.length; index++) {

            var checkbox = document.createElement('input');
            checkbox.type = "checkbox";
            checkbox.id = index;

            row = table.insertRow(index+1)
            cell1 = row.insertCell(0);
            cell2 = row.insertCell(1);
            cell3 = row.insertCell(2);
            cell4 = row.insertCell(3);
            cell5 = row.insertCell(4);
            cell6 = row.insertCell(5);
            cell7 = row.insertCell(6);

        // row classifications
            cell1.innerHTML = carReg[index].Brand
            cell2.innerHTML = carReg[index].Model
            cell3.innerHTML = carReg[index].Age
            cell4.innerHTML = carReg[index].KM
            cell5.innerHTML = carReg[index].Name
            cell6.innerHTML = carReg[index].ContactInfo
            cell7.appendChild(checkbox);
        }
    }

    function selling() {

        //query from localStorage
        var carReg = JSON.parse(localStorage.getItem("register"))

        for (var index = 0; index < carReg; index++) {
            if (!(document.getElementById(index).checked)) {
                index = localStorage.setItem("sell", JSON.stringify(carReg))
            }
        }
    }

基本上应该执行此操作的部分是这个。

function selling() {
    //query from localStorage
    var carReg = JSON.parse(localStorage.getItem("register"))

    for (var index = 0; index < carReg; index++) {
        if (!(document.getElementById(index).checked)) {
            index = localStorage.setItem("sell", JSON.stringify(carReg))
        }
    }
}

但它没有做任何事情。我缺少什么吗？还是只是我的if语句部分错了？

Answer 1

我发现答案是我在 for 语句中缺少“.length”。谢谢瓦普西!