The setItem() method is used to set the storage object item which is specified by the user. This storage object can be a localStorage object or sessionStorage object.
Syntax: For local storage:
localStorage.setItem(keyname, value)
For session storage:
sessionStorage.setItem(keyname, value)
Parameters: Two parameters are required :-
- Keyname: It specifies the name of the key used for getting the value.
- value: It specifies the value which replaces the old value.
Return Value: A String, representing the inserted value.
Example:
html
<!DOCTYPE html><html>
<head>
<!--script for creating new local
storage item and retrieve it -->
<script>
// Set item in local storage.
function createItem() {
localStorage.setItem("city", "Gwalior");
}
function myFunction() {
var x = localStorage.getItem("city");
document.getElementById("demo").innerHTML = x;
}
</script>
</head>
<body>
<h1>Welcome to GeeksforGeeks</h1>
<h3>The Storage setItem() Method</h3>
<p>Click on button to create a
local storage item </p>
<button onclick="createItem()">
Create local storage item
</button>
<p>Click the button to get the item value:</p>
<button onclick="myFunction()">
Get the item value
</button>
<p id="demo"></p>
</body>
</html>
|
Output:
Before:
After:
Supported Browsers: The browser supported by DOM setItem() Method are listed below:
- Google Chrome 4 and above
- Edge 12 and above
- Internet Explorer 8 and above
- Firefox 3.5 and above
- Opera 10.5 and above
- Safari 4 and above