store a single var in flash and load at start

Sat 2021.09.11

https://www.espruino.com/Reference#Stora­ge

Simple sample from above link:

var f = require("Storage");
f.write("a","Hello",0,14);
f.write("a"," ",5);
f.write("a","World!!!",6);
print(f.read("a")); // "Hello World!!!"

Add a counter:

var nCount = 0;

nCount++;

f.write("n",nCount.toString());
console.log("count is: ", f.read("n"));

nCount++;
nCount++;
nCount++;

f.write("n",nCount.toString());
console.log("count is: ", f.read("n"));

console.log(f.read("a"));

Now, type save() archiving that code block to permanent storage.

reset();

Reset device or power off / power on, then type in L-Hand console of WebIDE

console.log("count is: ", f.read("n"));

console.log(f.read("a"));

Output:

count is:  4
Hello World!!!
>