Error to key value message

error_to_string_key_value.js

const escape = value => {
    const hasSpace = /\s/.test(value);
    const hasNewLine = /\\n/.test(value);

    return hasSpace || hasNewLine ? JSON.stringify(value) : value
}

const toKeyValue = (key, value) => {
    return `${key}=${escape(value)}`
}

const toString = err => {
    const data = [
        toKeyValue('time', new Date().toISOString()),
        toKeyValue('type', 'error'),
        toKeyValue('name', err.name),
        toKeyValue('message', err.message),
        toKeyValue('stack', err.stack),
    ]

    return data.join(' ')
}

process.on('uncaughtException', (err)  => {
    const log = toString(err);
    console.log(log);
});

function main () {
    const a = 42;
    a = 69; // to test error
}

main()