This function displays structured information about one or more expressions that includes its type and value. Arrays and objects are explored recursively with values indented to show structure.

dumpObject.js

function dumpObject(object/*[, depth, name, objectHistory]*/) {
    var type = typeof object,
    isArray = object instanceof Array,
    isObject = type === 'object',
    isString = type === 'string',
    isFunction = type === 'function',
    isUndefined = type === 'undefined',
    isNull = object === null,
    prefix = ((isUndefined || isNull) ? '' : isString ? '"' : isArray ? '[' : isObject ? '{' : ''),
    posfix = ((isUndefined || isNull) ? '' : isString ? '"' : isArray ? ']' : isObject ? '}' : ''),
    value = '',
    tabs = '',
    depth = arguments[1] || 0,
    name = arguments[2] || '',
    objectHistory;

    if (!isUndefined && !isNull && (isArray || isObject)) {
        objectHistory = arguments[3] || [];

        if (objectHistory.indexOf(object) === -1) {
            objectHistory.push(object);

            for (var key in object) {
                value += dumpObject(object[key], depth + 1, key, objectHistory) + ',\n';
            }

            value = value.replace(/,\n$/, '');
        } else {
            value = '"' + object.toString() + '"';
        }
    } else {
        value = isUndefined ? 'undefined' : isNull ? 'null' : object.toString();

        if (isFunction) {
            value = value.replace(/\s+(?=([^'"]*['"][^'"]*['"])*[^'"]*$)/g, '');
        }
    }

    for (; tabs.length < depth; tabs += '\t'); // jshint ignore:line

    prefix = prefix + ((isArray || (isObject && !isNull)) ? '\n\r' : '');
    posfix = ((isArray || (isObject && !isNull)) ? '\n\r' + tabs : '') + posfix;

    return tabs + (name ? '"' + name + '": ' : ' ') + prefix + value + posfix;
}