tom-weatherhead/common-utilities.ts

// github:tom-weatherhead/common-utilities.ts/src/json.js

export function safeJsonParse<T>(str: string, dflt?: T): T {
    let result: T | undefined;
    let errorToThrow: unknown = new Error('safeJsonParse() : Typecast error');

    try {
        result = JSON.parse(str) as T;
    } catch (e) {
        errorToThrow = e;
    }

    if (typeof result !== 'undefined') {
        return result;
    } else if (typeof dflt !== 'undefined') {
        return dflt;
    } else {
        throw errorToThrow;
    }
}