shelving/schema/RequiredSchema.js

Toolkit for using data in JavaScript.

import { ThroughSchema } from "./ThroughSchema.js";
/** Validate a value of a specifed type, but throw `"Required"` if the validated value is falsy. */
export class RequiredSchema extends ThroughSchema {
    validate(unsafeValue) {
        const safeValue = super.validate(unsafeValue);
        if (!safeValue)
            throw "Required";
        return safeValue;
    }
}
/** Create a new required schema from a source schema. */
export const REQUIRED = (source) => new RequiredSchema({ source });