如何为我的计算器添加本地存储? [英] how to add a localstorage for my Calculator?

问题描述

我必须使用计算器.我得到了我需要的一切.唯一的是，我必须在结果"下添加一个LocalStorage.因此，计算器每次都会添加结果，直到删除会话为止.

I have to work on a calculator. I got everything i need. The only thing is, I have to add a LocalStorage under my Result. So the Calculator adds everytime the result, untill i delete the session.

例如:

"1 + 1 = 2，" 2 * 2 = 4，8/8 = 1

"1+1=2," 2*2=4, 8/8=1

本地存储:2,4,1

Localstorage: 2,4,1

function clear()
{
    number1.value = "";
    number2.value = "";
}
function clearresult()
{
    result.innerText = '';
}
function calc()
{
    var number1 = parseFloat(document.getElementById('number1').value);
    var number2 = parseFloat(document.getElementById('number2').value);
    var oper = document.getElementById('operators').value;
    if ( !isNaN(number1) && !isNaN(number2) )
    {
        if ( oper === '+' )
        {
            result.innerText = document.getElementById('result').value = parseFloat(number1) + parseFloat(number2);
        }
        if ( oper === '-' )
        {
            result.innerText = document.getElementById('result').value = parseFloat(number1) - parseFloat(number2);
        }
        if ( oper === '/' && number1 )
        {
            result.innerText = document.getElementById('result').value = parseFloat(number1) / parseFloat(number2);
        }
        if ( oper === '*' )
        {
            result.innerText = document.getElementById('result').value = parseFloat(number1) * parseFloat(number2);
        }
        clear();
        for (var i = 0; i < localStorage.length; i++)
        {
            localStorage.setItem('resultstorage', result.innerText);
            output.innerText = localStorage.getItem('resultstorage');
        }
    }
    else
    {
        alert("Es wurden keine Zahlen eingegeben!");
        clear();
        clearresult();
    }
}

推荐答案

*将结果存储在数组中，并将该数组存储在本地存储中，如下所述

*store your result in array and store that array in localstorage as mentioned below

let itemsArray = []
localStorage.setItem('items', JSON.stringify(itemsArray))
const data = JSON.parse(localStorage.getItem('items'))

将新结果放入数组

itemsArray.push(input.value)
localStorage.setItem('items', JSON.stringify(itemsArray))  

从本地存储中删除阵列

localStorage.clear()

这篇关于如何为我的计算器添加本地存储?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！