console.assert(value[, ...message])


    如果 value假值或省略,则 console.assert() 写入一条消息。 它只写入一条消息,不会影响执行。 输出始终以 "Assertion failed" 开头。 如果提供,则使用 util.format() 格式化 message

    • value <any> The value tested for being truthy.
    • ...message <any> All arguments besides value are used as error message.

    console.assert() writes a message if value is falsy or omitted. It only writes a message and does not otherwise affect execution. The output always starts with "Assertion failed". If provided, message is formatted using util.format().

    If value is truthy, nothing happens.

    console.assert(true, 'does nothing');
    
    console.assert(false, 'Whoops %s work', 'didn\'t');
    // Assertion failed: Whoops didn't work
    
    console.assert();
    // Assertion failed