@authduo/authduo/x/auth/utils/ensure.js

Free User-sovereign Authentication for the World

export class EnsureError extends Error {
    constructor(message) {
        super(`failed validation: ${message}`);
    }
}
function fn(kind, validate) {
    return (name, x) => {
        if (!validate(x))
            throw new EnsureError(`${name} should be ${kind}`);
        return x;
    };
}
export const ensure = {
    string: fn("string", x => typeof x === "string"),
    number: fn("number", x => typeof x === "number"),
    boolean: fn("boolean", x => typeof x === "boolean"),
    array: fn("array", x => Array.isArray(x)),
    object: fn("object", x => typeof x === "object" && !Array.isArray(x)),
};
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