Inputsvalidation

Security code

Masked CVC field with a lock affordance and a supporting hint about its location.

On the back

Installation

caveui components are copy-paste Jetpack Compose built entirely on Material 3 — there's no caveui dependency to add. Make sure Material 3 is on your classpath (it ships with the Compose BOM), then copy the Usage snippet below into your project.

kotlin

// build.gradle.kts (module)
dependencies {
    implementation(platform("androidx.compose:compose-bom:2025.06.00"))
    implementation("androidx.compose.material3:material3")
}

Usage

kotlin

var cvc by remember { mutableStateOf("") }
OutlinedTextField(
    value = cvc,
    onValueChange = { cvc = it.filter(Char::isDigit).take(4) },
    leadingIcon = { Icon(Icons.Filled.Lock, contentDescription = null) },
    visualTransformation = PasswordVisualTransformation(),
    placeholder = { Text("CVC") },
    supportingText = { Text("3 digits on the back") },
    keyboardOptions = KeyboardOptions(
        keyboardType = KeyboardType.NumberPassword,
    ),
    singleLine = true,
    modifier = Modifier.width(120.dp),
)