vide/docs/tut/crash-course/2-creation.md

Creating UI

Instances are created using create().

create() returns a constructor for a class which then takes a table of properties to assign when creating a new instance for that class.

Luau allows us to omit parentheses () when calling functions with string or table literals which is recommended to use for brevity.

local create = vide.create

return create "ScreenGui" {
    create "Frame" {
        AnchorPoint = Vector2.new(0.5, 0.5),
        Position = UDim2.fromScale(0.5, 0.5),
        Size = UDim2.fromScale(0.4, 0.7),

        create "TextLabel" {
            Text = "hi"
        },

        create "TextLabel" {
            Text = "bye"
        },

        create "TextButton" {
            Text = "click me",

            Activated = function()
                print "clicked!"
            end
        }
    }
}

Assign a value to a string key to set a property, and assign a value to a number key to set a child. Events can be connected to by assigning a function to a string key.