Javascript 在javascript中清除localStorage？
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Clearing localStorage in javascript?
提问by Bnicholas
Is there any way to reset/clear browser's localStorage in javascript?
有没有办法在javascript中重置/清除浏览器的localStorage？
回答by Digital Plane
Use this to clear localStorage:
使用它来清除 localStorage：
localStorage.clear();
回答by Ajeet Lakhani
If you want to remove a specific Item or variable from the user's local storage, you can use
如果要从用户的本地存储中删除特定的 Item 或变量，可以使用
localStorage.removeItem("name of localStorage variable you want to remove");
回答by Naftali aka Neal
window.localStorage.clear(); //try this to clear all local storage
回答by Christian Juth
Here is a function that will allow you to remove all localStorage items with exceptions. You will need jQueryfor this function. You can download the gist.
这是一个允许您删除所有 localStorage 项目但有异常的功能。您将需要jQuery来实现此功能。您可以下载要点。
You can call it like this
你可以这样称呼
let clearStorageExcept = function(exceptions) {
let keys = [];
exceptions = [].concat(exceptions); // prevent undefined
// get storage keys
$.each(localStorage, (key) => {
keys.push(key);
});
// loop through keys
for (let i = 0; i < keys.length; i++) {
let key = keys[i];
let deleteItem = true;
// check if key excluded
for (let j = 0; j < exceptions.length; j++) {
let exception = exceptions[j];
if (key == exception) {
deleteItem = false;
}
}
// delete key
if (deleteItem) {
localStorage.removeItem(key);
}
}
};
回答by Willem van der Veen
Localstorage is attached on the global window. When we log localstorage in the chrome devtools we see that it has the following APIs:
Localstorage 附加在全局window. 当我们在 chrome devtools 中记录 localstorage 时，我们看到它具有以下 API：
We can use the following API's for deleting items:
我们可以使用以下 API 来删除项目：
localStorage.clear(): Clears the whole localstoragelocalStorage.removeItem('myItem'): To remove individual items
localStorage.clear(): 清除整个本地存储localStorage.removeItem('myItem')：删除单个项目
回答by Hyman Giffin
First things first, you need to check to make sure that localStorage is enabled. I would recommend doing it like this:
首先，您需要检查以确保启用了 localStorage。我建议这样做：
var localStorageEnabled = false;
try { localStorageEnabled = !!localStorage; } catch(e) {};
Yes, you can (in some cases) just check to see if the localStorage is a member of the window object. However, there are iframe sandboxing options (among other things) that will throw an exception if you even attempt to access the index 'localStorage'. Thus, for best-practices reasons, this is the best way to check to see if the localStorage is enabled. Then, you can just clear the localStorage like so.
是的，您可以（在某些情况下）只检查 localStorage 是否是 window 对象的成员。但是，如果您甚至尝试访问索引“localStorage”，也有 iframe 沙盒选项（除其他外）会引发异常。因此，出于最佳实践的原因，这是检查是否启用 localStorage 的最佳方法。然后，您可以像这样清除 localStorage 。
if (localStorageEnabled) localStorage.clear();
For example, you could clear the localStorage after an error occurs in webkit browsers like so.
例如，您可以像这样在 webkit 浏览器中发生错误后清除 localStorage。
// clears the local storage upon error
if (localStorageEnabled)
window.onerror = localStorage.clear.bind(localStorage);
In the above example, you need the .bind(window)because without it, the localStorage.clearfunction will run in the context of the windowobject, instead of the localStorageobject making it silently fail. To demonstrate this, look at the below example:
在上面的示例中，您需要 ，.bind(window)因为没有它，localStorage.clear函数将在window对象的上下文中运行，而不是localStorage对象使其静默失败。为了证明这一点，请看下面的例子：
window.onerror = localStorage.clear;
is the same as:
是相同的：
window.onerror = function(){
localStorage.clear.call(window);
}
回答by Moshiur Rahman
If you want to clear all item you stored in localStoragethen
如果要清除存储在localStorage 中的所有项目，则
localStorage.clear();
Use this for clear all stored key.
用于清除所有存储的密钥。
If you want to clear/remove only specific key/value then you can use removeItem(key).
如果您只想清除/删除特定的键/值，则可以使用removeItem(key)。
localStorage.removeItem('yourKey');
回答by vino
localStorage.clear();
or
或者
window.localStorage.clear();
to clear particular item
清除特定项目
window.localStorage.removeItem("item_name");
To remove particular value by id :
要按 id 删除特定值：
var item_detail = JSON.parse(localStorage.getItem("key_name")) || [];
$.each(item_detail, function(index, obj){
if (key_id == data('key')) {
item_detail.splice(index,1);
localStorage["key_name"] = JSON.stringify(item_detail);
return false;
}
});
回答by m-farhan
To clear sessionStorage
清除 sessionStorage
sessionStorage.clear();
回答by amaroko
Here is a simple code that will clear localstorage stored in your browser by using javascript
这是一个简单的代码，它将使用 javascript 清除存储在浏览器中的 localstorage
<script type="text/javascript">
if(localStorage) { // Check if the localStorage object exists
localStorage.clear() //clears the localstorage
} else {
alert("Sorry, no local storage."); //an alert if localstorage is non-existing
}
</script>
To confirm if localstorage is empty use this code:
要确认 localstorage 是否为空，请使用以下代码：
<script type="text/javascript">
// Check if the localStorage object exists
if(localStorage) {
alert("Am still here, " + localStorage.getItem("your object name")); //put the object name
} else {
alert("Sorry, i've been deleted ."); //an alert
}
</script>
if it returns null then your localstorage is cleared.
如果它返回 null 则你的本地存储被清除。
