decodeUnknownSync

Avatar of Hemanta SundarayHemanta Sundaray

decodeunknownSync is synchronous decoder. On decode failure, it throws a native JavaScript Error.

schema.ts
import { Schema, SchemaIssue } from "effect";
const schema = Schema.Struct({
name: Schema.String,
age: Schema.Number,
});
const decode = Schema.decodeUnknownSync(schema);
// Happy path
const decoded = decode({ name: "Alice", age: 30 });
console.log("Decoded Value:", decoded);
// Error path
try {
decode({ name: 42, age: "30" }, { errors: "all" });
} catch (error) {
if (error instanceof Error) {
console.log("Error Message:", error.message);
if (SchemaIssue.isIssue(error.cause)) {
console.log("Issue Tree:", error.cause);
}
}
}

The human-readable message is on error.message, and the structured issue tree is attached to error.cause.

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