Don't overwrite a shared object with a new value.

The object returned by partyLoadShared() is automatically watched and its property values are synchronized. Don't try to update all the values of the shared object at once by assigning a new object to the root variable. This will replace the shared object with an unshared one and break syncing.

DONT overwrite the the shared object with a new value.

shared = partyLoadShared("globals")
...
shared = {x: 10, y: 10}

DO assign values to properties on the shared object.

shared = partyLoadShared("globals")
...
shared.x = 10;
shared.y = 10;

DO use partySetShared() to replace all properties at once

shared = partyLoadShared("globals")
...
partySetShared(shared, **{x: 10, y: 10});**

Don't keep global references to shared object properties.

Instead of storing references to the properties of your shared object in global variables, either access them directly when needed or store them in local variables.

DON'T:

var myX,myY;

function setup() {
	shared = partyLoadShared("globals");
	myX=shared.x;
	myY=shared.y;
}

function draw() {
 circfill(myX,myY,30);
}

DO:

var shared;
function setup() {
	shared = partyLoadShared("globals");
}

function draw() {
	let myX = shared.x;
	let myY = shared.y;
	ellipse(myX, myY, 30, 30);
}

var shared;

function setup() {
	shared = getSharedData("globals");
}

function draw() {
 ellipse(shared.x, shared.y, 30, 30);
}

Avoid setting shared object properties more often than needed.

Don’t repeatedly set a property every frame in the draw loop, if you can set it just when it needs to change.

Don't set shared object values every frame.