Question

我想知道是否有人知道如何从本地存储中调用特定密钥，如下所示：

钥匙清单：

_#12345
_this is a random key
_random123
_#54321

理想的剧本：

MyScript {
    Find all keys that start with "_#" then print value of key (ignore other keys)
}

Answer 1

这应该有效：

// sample values:
localStorage.setItem("_#12345",'Correct');
localStorage.setItem("_this is a random key",'Wrong');
localStorage.setItem("_random123",'Wrong');
localStorage.setItem("_#54321",'Correct');

// iterate over all keys in localStorage
for (var i = 0; i < localStorage.length; i++) {
    var key = localStorage.key(i); // get key by index

    if (key.indexOf("_#") === 0) { // if starts with _#
        var elem = localStorage.getItem(key); // get value by key
        console.log(elem); // print it out / do something else
    }
}

输出：

"Correct"
"Correct"

Answer 2

调用此函数以打印localstorage值

   function PrintLocalstorageValues()
    {
     for (var i = 0; i < localStorage.length; i++) {
        var keyName = localStorage.key(i);  

        if (keyName.indexOf("_#") ==0) { 
            var value= localStorage.getItem(keyName);  
            alert(value); //output ,you can push these into array
        }
     }
    }

感谢

使用javascript从localstorage调用指定的键

2 个答案: