🧑🎓 Custom rules
You can define your own Predicates
, with entirely your own logic, or by composing other Predicates
:
const { asVerificable, isNumber, ensure } = require("verifica");
function isEvenNumber(verificable) {
const number = ensure(verificable, isNumber);
if (number % 2 !== 0) {
return makeError(verificable, {
type: "isEvenNumber",
});
}
// return nothing = OK
}
function sayEvenNumber(number) {
const vnumber = asVerificable(number);
ensure(vnumber, isEvenNumber);
console.log(`Number ${number} is even!`);
}
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