1.localeStroage.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>localStorage</title>
</head>
<body>
<h2>localStorage</h2>
<button onclick="saveData()">点我保存一个数据</button>
<button onclick="readData()">点我读取一个数据</button>
<button onclick="deleteData()">点我删除一个数据</button>
<button onclick="clearData()">清空数据</button>
<script>
let p = { name: "张三", age: 38 };
function saveData() {
readData.setItem("msg", "99999");
localStorage.setItem("msg2", 99999);
localStorage.setItem("person", JSON.stringify(p));
}
function readData() {
console.log(localStorage.getItem("msg"));
console.log(localStorage.getItem("msg2"));
const result = localStorage.getItem("person");
console.log(JSON.parse(result)); //null 的 JSON.parse(null) 还是空
}
function deleteData() {
localStorage.removeItem("msg");
}
function clearData() {
localStorage.clear();
}
</script>
</body>
</html>
2. sessionStroage
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>sessionStorage</title>
</head>
<body>
<h2>sessionStorage</h2>
<button onclick="saveData()">点我保存一个数据</button>
<button onclick="readData()">点我读取一个数据</button>
<button onclick="deleteData()">点我删除一个数据</button>
<button onclick="clearData()">清空数据</button>
<script>
let p = { name: "张三", age: 38 };
function saveData() {
sessionStorage.setItem("msg", "99999");
sessionStorage.setItem("msg2", 99999);
sessionStorage.setItem("person", JSON.stringify(p));
}
function readData() {
console.log(sessionStorage.getItem("msg"));
console.log(sessionStorage.getItem("msg2"));
const result = sessionStorage.getItem("person");
console.log(JSON.parse(result)); //null 的 JSON.parse(null) 还是空
}
function deleteData() {
sessionStorage.removeItem("msg");
}
function clearData() {
sessionStorage.clear();
}
</script>
</body>
</html>