How to Save Setting in Script

About a month ago I had to do Save for Web with Month & Day Script? for the very first time. This was my first attempt at writing/reading from a text file.

In this case it is just a simple, single string of text to log save file directory path, that could be referenced in two separate scripts:

/////////////////// WRITE PREFERENCE FILE ///////////////////

// Select the folder to write to the preference file
var prefFilePath = Folder.selectDialog('Select the save folder...', '~/Documents');

// Create the preference file
var prefFile = new File('~/Desktop/Pref-File.txt');

// Write the directory path to the pref file
// r = read mode | w = write mode | a = append | e = edit
prefFile.open('w');
prefFile.write(prefFilePath.fsName);
prefFile.close();
prefFile.encoding = 'UTF-8';
// LineFeed options
// prefFile.lineFeed = "Unix";
// prefFile.lineFeed = "Windows";
// prefFile.lineFeed = "Macintosh";

// Alert notice
alert('Save path written to Desktop log file "Pref-File.txt"');

////////////////////////////////////////////////////////////

/////////////////// READ PREFERENCE FILE ///////////////////

// Pref file location
var prefFile = File('~/Desktop/Pref-File.txt');

// Open the pref file: r = read mode | w = write mode | a = append | e = edit
var openPrefFile = prefFile.open('r');

// Read the value
var prefFileValue = prefFile.readln();

// Pref file value returned
alert('Save folder location:' + '\r' + prefFileValue);

////////////////////////////////////////////////////////////

Perhaps one day I'll need to graduate to a JSON or XML file, however I was just happy to get a plain text file working in this case!

Typically you would write settings to a file and read them out again. Extendscript has good XML support.

You can also use the app.preferences object and save a preference setting as

app.preferences.mypref = 'foo';

var bar = app.preferences.mypref;