有没有办法用javascript重置/清除浏览器的localStorage?
当前回答
这里的代码给出了一个不想删除的键字符串列表,然后从本地存储中的所有键中筛选这些键,然后删除其他键。
const allKeys = Object.keys(localStorage);
const toBeDeleted = allKeys.filter(value => {
return !this.doNotDeleteList.includes(value);
});
toBeDeleted.forEach(value => {
localStorage.removeItem(value);
});
其他回答
这里有一个函数,允许您删除所有localStorage项,但有例外。这个函数需要jQuery。你可以下载要点。
你可以这样称呼它
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);
}
}
};
这里的代码给出了一个不想删除的键字符串列表,然后从本地存储中的所有键中筛选这些键,然后删除其他键。
const allKeys = Object.keys(localStorage);
const toBeDeleted = allKeys.filter(value => {
return !this.doNotDeleteList.includes(value);
});
toBeDeleted.forEach(value => {
localStorage.removeItem(value);
});
本地存储附加在全局窗口上。当我们在chrome devtools中记录本地存储时,我们看到它具有以下API:
我们可以使用以下API删除项目:
localStorage.clear():清除整个localStoragelocalStorage.removeItem('myItem'):删除单个项目
下面是一个简单的代码,它将使用javascript清除存储在浏览器中的本地存储
<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>
要确认本地存储是否为空,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>
如果返回null,则清除本地存储。
手动按钮:
<script>
function ask() {
if (confirm('Clear localStorage?') == true) {
localStorage.clear()
location.reload()
}
else {
alert('Nothing happend')
}
}
}
</script>
<style>
button {border-width:0px;background-color:#efefef;padding:5px;width:5cm;margin:5px;}
</style>
<button onclick=ask()>Clear localStorage</button>