Topic: Storage management function addition request
Expected behavior。
Just want to judge whether the specified cache name exists in the cache and return a Boolean value
只想判断缓存中是否存在指定的缓存名称，并返回一个布尔值。
Hope to increase
希望增加
Storage.has('StorageName');
var res = Storage.has('StorageName');
if(res == true){
// ......
}else{
// ......
}
Actual behavior。 No such function. 没有这样的功能
We don't have such a method, but you can easily use the get method to do this:
Storage.set('date', new Date());
Storage.set('example', '');
console.log(Boolean(Storage.get('date'))); // -> true
console.log(Boolean(Storage.get('example'))); // -> false
console.log(Boolean(Storage.get('example2'))); // -> false
In some cases, you may want to store false in storage. In this case, it is better to create an additional method that will check it:
Storage.set('false', false);
const has = (name) => {
const storageValue = Storage.get(name);
return storageValue === false ? true : Boolean(storageValue);
}
console.log(has('false')); // -> true
All right. It's just that i always feel that lack a little function
In addition, Code version you released ,hope more tests can be conducted
When the caching function is used, an error is reported directly, and no method is found
I have modified the code myself. Please fix this problem in time
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Answered
- User: Free
- Premium support: No
- Technology: MDB Standard
- MDB Version: MDB5 5.0.0
- Device: PC
- Browser: Microsoft Edge
- OS: windows10
- Provided sample code: No
- Provided link: No