JSON

ConstraintSet can be initialized from a JSON string:

        {
            g1: { type: 'vGuideline', start: 80 },
            button: {
              top: ['title', 'bottom', 16],
              start: ['g1', 'start']
            },
            title: {
              centerVertically: 'parent',
              start: ['g1', 'start']
            }
        }

Is the equivalent to the Kotlin DSL:

    ConstraintSet {
        val button = createRefFor("button")
        val title = createRefFor("title")
        val g1 = createGuidelineFromStart(80.dp)
        constrain(button) {
            top.linkTo(title.bottom, 16.dp)
            start.linkTo(g1)
        }
        constrain(title) {
            centerVerticallyTo(parent)
            start.linkTo(g1)
        }
    },

The overall syntax is as follow:

    <id> : { <constraints> }

With following the pattern:

    <from anchor> : [ '<target id>', '<target anchor>', <margin> ]