LocalStorage-按值而不是键删除项目? [英] LocalStorage - Remove item by value and not key?

问题描述

好的，所以我在LocalStorage中有这样的JSON:

Ok so I have a JSON like this stocked in LocalStorage :

[{"pseudo":"Lucia","id":2},{"pseudo":"Romain","id":1}]

我搜索了如何删除一项，但只找到了这一点:

I searched how I can remove one item and I only find this :

storage.removeItem(keyName);

但是，如果我错了，请纠正我，如果我这样做，如果我执行storage.removeItem(pseudo)，则会删除keyName为"pseudo"的所有值.

But, correct me if I am wrong, if I use this will remove all the value with keyName "pseudo" if I do storage.removeItem(pseudo);

如何仅从json中删除{"pseudo":"Romain","id":1}并保留{"pseudo":"Lucia","id":2}?

How can I only remove {"pseudo":"Romain","id":1} from the json and keep {"pseudo":"Lucia","id":2} ?

谢谢.

推荐答案

localstorage仅支持字符串值，因此您需要解析数据.

localstorage only supports string values, so you need to parse data.

    var storedNames = JSON.parse(localStorage.getItem("keyName"));

    // here you need to make a loop to find the index of item to delete
    var indexToRemove = 1;

    //remove item selected, second parameter is the number of items to delete 
    storedNames.slice(indexToRemove, 1);

   // Put the object into storage
   localStorage.setItem('keyName', JSON.stringify(storedNames));

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