function formatObject(arg, depth) {
    switch(typeof arg){
        case 'object':
            if (arg === null) {
                return 'null';
            } else if (Array.isArray(arg)) {
                let result = '[';
                if (depth < 1) {
                    for(let i = 0; i < arg.length; i++){
                        if (result !== '[') {
                            result += ',';
                        }
                        if (Object.prototype.hasOwnProperty.call(arg, i)) {
                            result += formatObject(arg[i], depth + 1);
                        }
                    }
                } else {
                    result += arg.length > 0 ? '...' : '';
                }
                result += ']';
                return result;
            } else if (arg instanceof Error) {
                return arg + '';
            } else {
                const keys = Object.keys(arg);
                let result = '{';
                if (depth < 1) {
                    for(let i = 0; i < keys.length; i++){
                        const key = keys[i];
                        const desc = Object.getOwnPropertyDescriptor(arg, 'key');
                        if (desc && !desc.get && !desc.set) {
                            const jsonKey = JSON.stringify(key);
                            if (jsonKey !== '"' + key + '"') {
                                result += jsonKey + ': ';
                            } else {
                                result += key + ': ';
                            }
                            result += formatObject(desc.value, depth + 1);
                        }
                    }
                } else {
                    result += keys.length > 0 ? '...' : '';
                }
                result += '}';
                return result;
            }
        case 'string':
            return JSON.stringify(arg);
        default:
            return String(arg);
    }
}
export function formatConsoleArgs(args) {
    let message;
    let idx;
    if (typeof args[0] === 'string') {
        message = args[0];
        idx = 1;
    } else {
        message = '';
        idx = 0;
    }
    let result = '';
    let startQuote = false;
    for(let i = 0; i < message.length; ++i){
        const char = message[i];
        if (char !== '%' || i === message.length - 1 || idx >= args.length) {
            result += char;
            continue;
        }
        const code = message[++i];
        switch(code){
            case 'c':
                {
                    // TODO: We should colorize with HTML instead of turning into a string.
                    // Ignore for now.
                    result = startQuote ? "" + result + "]" : "[" + result;
                    startQuote = !startQuote;
                    idx++;
                    break;
                }
            case 'O':
            case 'o':
                {
                    result += formatObject(args[idx++], 0);
                    break;
                }
            case 'd':
            case 'i':
                {
                    result += parseInt(args[idx++], 10);
                    break;
                }
            case 'f':
                {
                    result += parseFloat(args[idx++]);
                    break;
                }
            case 's':
                {
                    result += String(args[idx++]);
                    break;
                }
            default:
                result += '%' + code;
        }
    }
    for(; idx < args.length; idx++){
        result += (idx > 0 ? ' ' : '') + formatObject(args[idx], 0);
    }
    return result;
}

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