转载：https://www.cnblogs.com/st-leslie/p/5617130.html
总结的非常好！
自己的demo
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>本地储存</title> </head> <body> <p id="dd"></p> <script> localStorage.setItem("name","小红红"); localStorage.setItem("age","20"); localStorage.setItem("height","160cm"); localStorage.setItem("name","aaaa"); //重新设置name的值，覆盖掉之前的 localStorage.removeItem("height"); //删除height的值 var ss = localStorage.getItem("age"); var dds =document.getElementById("dd"); dds.innerHTML = ss; //赋值 localStorage.clear(); //清除本地储存 </script> </body> </html>