如何从sessionStorage（AngularJs）中删除单个对象 [英] How to remove single object from the sessionStorage (AngularJs)

问题描述

我将列表添加到sessionStorage，例如：

I add list to sessionStorage like:

var item = new cartItem(product.id, product.name, product.price, qty);
orderItem.push(item);
sessionStorage.setItem('addedProductsList', JSON.stringify(orderItem));
var retrieveArray= JSON.parse(sessionStorage.addedProductsList);  

及其工作正常，现在我想通过productId从此列表中删除单个对象。

and its working fine, now i want to remove a single object from this list by productId.

推荐答案

请参阅以下文章： http://www.nczonline.net/blog/2009/07/21/introduction-to-sessionstorage/

如果你想从会话存储中删除指定键/值对，你需要这样的smth：

If you want to remove specify key/value pair from session storage, you need smth like this:

sessionStorage.removeItem(key)

根据您的情况：

var retrieveArray= JSON.parse(sessionStorage.addedProductsList);

for (i=0; i<retrieveArray.length; i++){
    if (retrieveArray[i].id == "Your ProductId") {
        retrieveArray.splice(i,1);
    }
}

sessionStorage.addedProductsList = retrieveArray;

此外，正确的实现允许您从sessionStorage中读取，写入和删除值，就好像它是常规对象。例如：

Additionally, proper implementations allow you to read, write, and remove values from sessionStorage as if it were a regular object. For example:

//save a value
sessionStorage.name = "Name";

//retrieve item
var name = sessionStorage.name;

//remove the key
delete sessionStorage.name;

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