Javascript HTML5 Localstorage & jQuery：删除以某个单词开头的 localstorage 键
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HTML5 Localstorage & jQuery: Delete localstorage keys starting with a certain word
提问by jQuerybeast
I have 2 apps working together with localstorage and I was wondering how can I delete all the keys which start with note- and todo- . I know localstorage.clear() clears everything but thats not my aim.
我有 2 个应用程序与 localstorage 一起工作，我想知道如何删除所有以 note- 和 todo- 开头的键。我知道 localstorage.clear() 清除所有内容，但这不是我的目标。
Here is an example of what I have in my localstorage: 
这是我在本地存储中拥有的示例：
Where I want to delete all the todo-* with a button click and all note-* with other button click using jquery.
我想通过单击按钮删除所有 todo-* 以及使用 jquery 单击其他按钮删除所有 note-*。
Thanks alot
非常感谢
回答by Ghostoy
Object.keys(localStorage)
.forEach(function(key){
if (/^todo-|^note-/.test(key)) {
localStorage.removeItem(key);
}
});
回答by WEFX
I used a similar method to @Ghostoy , but I wanted to feed in a parameter, since I call this from several places in my code. I wasn't able to use my parameter name in a regular expression, so I just used substring instead.
我使用了与 @Ghostoy 类似的方法，但我想输入一个参数，因为我从代码中的多个位置调用它。我无法在正则表达式中使用我的参数名称，所以我只使用了子字符串。
function ClearSomeLocalStorage(startsWith) {
var myLength = startsWith.length;
Object.keys(localStorage)
.forEach(function(key){
if (key.substring(0,myLength) == startsWith) {
localStorage.removeItem(key);
}
});
}
