sharepoint list item update programmatically CSOM

SharePoint list item update using CSOM

	function updateListItem(listName, id,title) {
	var ctx = new SP.ClientContext();
	var oList = ctx.get_web().get_lists().getByTitle(listName);
	var olistItem = oList.getItemById(id);
	olistItem.set_item("Title", title);
	olistItem.update();
	ctx.load(olistItem);
	ctx.executeQueryAsync(
	function () {
	console.log('updated success');
	},
	function (sender, args) {
	console.log('Error in updating data');
	}
	);
	}

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