Modify Site Regional and Default Language settings with JSOM and JavaScript

There are some really nice code examples for the CSOM Regional and Language APIs in the Office Dev PnP Library:
https://github.com/OfficeDev/PnP/tree/master/Samples/Core.Settings.LocaleAndLanguage

But, I could not find JSOM code example of these APIs. So I am listing down some of the most frequently used Regional and Language functions here.

1) Add a Supported UI Language:

	(function () {
	"use strict";
	var context = SP.ClientContext.get_current();
	var web = context.get_web();
	//This is important. Wont work otherwise.
	web.set_isMultilingual(true);
	web.addSupportedUILanguage(1043); //Dutch
	//The full list of SharePoint 2013 and SharePoint Online LCIDs is here:
	//https://technet.microsoft.com/en-us/library/ff463597.aspx
	web.update();
	context.executeQueryAsync(function(){
	console.log("Language Added");
	},function(sender,args){
	console.log(args.get_message());
	});
	})();

view rawJSOM_MUI_Add.js hosted with ❤ by GitHub

2) Remove a Supported UI Language:

	(function () {
	"use strict";
	var context = SP.ClientContext.get_current();
	var web = context.get_web();
	//This is important. Wont work otherwise.
	web.set_isMultilingual(true);
	web.removeSupportedUILanguage(1043); //Dutch
	web.update();
	context.executeQueryAsync(function(){
	console.log("Language Removed");
	},function(sender,args){
	console.log(args.get_message());
	});
	})();

view rawJSOM_MUI_Remove.js hosted with ❤ by GitHub

3) Disable Multi Lingual and Remove all UI Languages:

	(function () {
	"use strict";
	var context = SP.ClientContext.get_current();
	var web = context.get_web();
	//Remove all UI languages
	web.set_isMultilingual(false);
	web.update();
	context.executeQueryAsync(function(){
	console.log("MUI Disabled");
	},function(sender,args){
	console.log(args.get_message());
	});
	})();

view rawJSOM_MUI_False.js hosted with ❤ by GitHub

4) Get Regional Settings:

A full list of all the regional settings properties is available here:
https://msdn.microsoft.com/EN-US/library/office/jj244880.aspx

	(function () {
	"use strict";
	var context = SP.ClientContext.get_current();
	var web = context.get_web();
	var regionalSettings = web.get_regionalSettings();
	context.load(regionalSettings, "TimeZone", "Time24", "LocaleId")
	context.executeQueryAsync(function () {
	//TimeZone
	console.log(regionalSettings.get_timeZone().get_description()); //(UTC) Dublin, Edinburgh, Lisbon, London
	//24 Hour Clock
	console.log(regionalSettings.get_time24()) //True/False
	//Locale Id
	console.log(regionalSettings.get_localeId()); //2057
	}, function (sender, args) {
	console.log(args.get_message());
	});
	})();

view rawJSOM_RegionalProperties_Get.js hosted with ❤ by GitHub

5) Set Regional Settings:

	(function () {
	"use strict";
	var context = SP.ClientContext.get_current();
	var web = context.get_web();
	var regionalSettings = web.get_regionalSettings();
	context.load(regionalSettings)
	context.executeQueryAsync(function () {
	regionalSettings.set_localeId(2057) //English (UK)
	regionalSettings.set_time24(true); //true/false
	regionalSettings.update();
	context.executeQueryAsync(function () {
	console.log("success");
	}, function (sender, args) {
	console.log(args.get_message());
	});
	}, function (sender, args) {
	console.log(args.get_message());
	});
	})();

view rawJSOM_RegionalProperties_Set.js hosted with ❤ by GitHub

6) Set Time Zone of a site:

This one was a bit tricky but I finally got there in the end. You will need to know the ID of the Time Zone you want to set in the site. A full list of SharePoint TimeZone IDs is here:
https://msdn.microsoft.com/library/microsoft.sharepoint.spregionalsettings.timezones.aspx

	(function () {
	"use strict";
	var context = SP.ClientContext.get_current();
	var web = context.get_web();
	var regionalSettings = web.get_regionalSettings();
	//Find the full list of SharePoint TimeZone IDs here
	//https://msdn.microsoft.com/library/microsoft.sharepoint.spregionalsettings.timezones.aspx
	var timeZone = regionalSettings.get_timeZones().getById(23); //(GMT+05:30) Chennai, Kolkata, Mumbai, New Delhi
	context.load(regionalSettings);
	context.load(timeZone);
	context.executeQueryAsync(function () {
	regionalSettings.set_timeZone(timeZone);
	regionalSettings.update();
	context.executeQueryAsync(function () {
	console.log("success");
	}, function (sender, args) {
	console.log(args.get_message());
	});
	}, function (sender, args) {
	console.log(args.get_message());
	});
	})();

view rawJSOM_RegionalSettings_SetTimeZone.js hosted with ❤ by GitHub