Storage

The storage object provide the functions for storing key-value items in local persistent storage.
Please note that typically internal flash memory is used to store data items. As you know flash memory has finite number of write/erase cycles (less than tens of thousands), so please do not use this storage API for the jobs need frequently write/erase cycles.
Object: Storage
storage.length
<number>
Returns the number of data items in the storage.
storage.setItem("key1", "value1");
storage.setItem("key2", "value2");
console.log(storage.length); // 2
storage.getItem(key)
key <string> 
Return the value associated with the given key.
storage.setItem("key1", "value1");
var value1 = storage.getItem("key1");
var value2 = storage.getItem("key2"); // null
console.log(value); // "value1"
storage.setItem(key, value)
key <string> 
value <string> 
Add the key with the value to the storage.
storage.setItem("key1", "value1");
var value1 = storage.getItem("key1"); // "value1"
storage.setItem("key1", "new value");
value1 = storage.getItem("key1"); // "new value"
storage.removeItem(key)
key <string> 
Remove the data item associated with the given key.
storage.setItem("key1", "value1");
storage.removeItem("key1");
var value1 = storage.getItem("key1"); // null
storage.clear()
Remove all the data items in the storage.
storage.setItem("key1", "value1");
storage.setItem("key2", "value2");
storage.clear();
var value1 = storage.getItem("key1"); // null
var value2 = storage.getItem("ket2"); // null
storage.key(index)
index <number> 
Returns: <string> 
Returns the key string of the given index.
storage.setItem("key1", "value1");
storage.setItem("key2", "value2");
console.log(storage.length); // 2
console.log(storage.key(0)); // "key1"
console.log(storage.key(1)); // "key2"
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Last updated 2 years ago