HTML5 localStorage从价值中获取关键 [英] HTML5 localStorage getting key from value

问题描述

localStorage.getItem将检索值.

localStorage.getItem will retrive value.

和setItem将设置值.

and setItem will set value.

但是，如果我想知道哪个键与此特定值相关联?那么如何获取密钥.

But If I want to know which key was associated with this particular value? Then how to get Key of that.?

所以我已经回答了这个问题

推荐答案

访问 Html5存储文档到了解更多详情.使用以下语法来设置和获取localstorage/sessionstorage中的值 用于存储会话的值

visit Html5 Storage Doc to get more details. Use the following syntax to set and get the values in localstorage/sessionstorage for storing values for a session

sessionStorage.getItem('key')
sessionStorage.setItem('key','value')

或使用永久存储值

localStorage.getItem('key')
localStorage.setItem('key','value')

您说您想知道值，但是您想要键，则可以使用该功能

and u said u want to know the value but you want key then you can use the function

  localStorage.key(i);

或者您也可以遍历可用键并通过交叉检查值来获取所需键

or also you can loop through the available keys and get the desired key by cross checking the value

for(var i=0, len=localStorage.length; i<len; i++) {
    var key = localStorage.key(i);
    var value = localStorage[key];
    if(value.equals(desired_value))
    console.log(key + " => " + value);
}

这篇关于HTML5 localStorage从价值中获取关键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！