The Essential Guide to HTML5

MAZES

alert("Stored: "+olddate);
}
catch(e) {
alert("Error with use of local storage: "+e);}
}

If you removed the if (typeof(localStorage) test and tried the code in the old IE, youd see the
message shown in Figure 7-15.

Figure 7-15. Browser error, caught in a try/catch

The Table 7-1 shows the complete date application. Remember: you may need to upload this to a server to
test it.

Table 7-1. Complete Code for the Date Application

Code Explanation

<html> Opening html tag

<head> Opening head tag

<title>Local Storage test</title> Complete title

<script> Opening script

function store() { Store function header

if (typeof(localStorage) == "undefined") { Check if localStorage recognized

alert("Browser does not recognize HTML local storage.");

Display alert message

} Close if clause

else { Else