ECMA6 CSS3 HTML5 (sample source code)

ECMA 6:

This is a collection of 2 small sample applications and a small training school course and student data management application (with a JavaScript class definition), with all source code and data. They were developed in HTML 5.0, CSS 3 and JavaScript ECMA 6 programming languages.

They are compatible with any internet browser, have been developed with the latest version of Visual Studio Code, on the Windows 10 operating system and have been tested on the latest version of Google Chrome.

For those who don't know how to create dynamic web pages, with these working examples they will find the basics to do it.

New improvements in the following project (with example):

SCHOOL.JS: Class to insert, modify or delete students and/or courses of a school created with a single JavaScript object.

• Ok. I must use the backtick (`) for string creation, rather than concatenation (+).
• Ok. I must use vector.forEach() in place of for where necessary.
• Ok. I must use vector.splice(i,1) in place of for where necessary.
• Ok. Before performing a pop() or splice() from an array of objects, I must deallocate the object with object={} .
• Ok. I must deallocate an array with array=[], instead of for and pop().
• Ok. I must make private the methods that don't check the correctness of the input parameters or that can generate errors if used from outside.
• Ok. I must add get_stud_total(), set_stud() and get_stud() methods.
• Ok. add_student() must return the same course as the previously selected user.
• Ok. Allocating properties of a class with constructor.
• Ok. View the number of students in a course.
• Ok. View student ID, name and surname of all students in a course.

This software was developed thanks to the attendance of the Piedmont Region course called "FAL - Assistant programmer" of ENGIM (Turin) at the Artigianelli school in Corso Palestro 14 (Turin, Italy); a heartfelt thanks to teachers Dario Mennillo (JavaScript ECMA 6) and Giorgia Liuni (HTML 5.0 and CSS 3) !

System requirements

This app run on all machines with operating systems from Windows XP to Windows 11 . As far as hardware is concerned, all AMD and Intel microprocessors that support 32-bit protected mode, which have a clock frequency of no less than 667 MHZ and which have at least 1 GB of RAM installed are supported.

Description of operation and warranty:

My programs are distributed in 2 versions: zip archive generated with WinRAR (*) and installer created with Inno Setup Compiler (**); they do not contain advertising, there are no pop-ups of any kind, you do not have to pay to win, they do not connect in any way to the internet, they do not install or modify any DLL (dynamic linked libraries), all the files used by my applications are were created solely by me (***) and are transferred to a single destination folder. My program never accesses files outside the folder to which it was transferred, with the exception, only for some programs, of a configuration subfolder of the root directory of your hard disk/SD, created specifically to contain temporary files and preferences.

The installation program will only take care of selecting the destination, transferring files, creating an icon in the programs section of the start menu, optionally creating an icon on the desktop and configuring the new file extensions, defined by me, in such way that, doing a double click on one of them, he is load it into memory, to be able to modify it.

In Windows 10 or Windows 11 it is not recommended to install this software in the "Program files" and "Program files (x86)" folders, because, if you do not run this software, after the installation process, with administrator privilege, is impossible to save the configuration file, the top players score table file and the game recording file. The suggestion is to select a subfolder of the main folder of your hard disk/SD as the destination folder during the installation process.

My programs were conceived, designed and developed solely by me, in Assembly (80386+ protected mode) and Pascal through the Borland Delphi 7.0 development system. They run on all machines with operating systems from Windows XP to Windows 11 and numerous tests have been carried out by me on various PCs, periodically releasing updates to correct any bugs and expand their features.

As far as hardware is concerned, all AMD and Intel microprocessors that support 32-bit protected mode, which have a clock frequency of no less than 667 MHZ and which have at least 1 GB of RAM installed are supported. As regards the memory occupation on the hard disk or SD card, it is almost always around 50 MB to 100 MB with the exception of "my 5 video games" (500MB).

I have also created, designed and developed some software that is not compatible with operating systems superior to Windows XP, always explaining the hardware/software requirements, in Assembly (80x86+ real mode) and Pascal through the Borland Pascal 1.0 development system. They run on all machines with operating systems from Windows 2000 to Windows XP or on machines with the latest Windows systems equipped with an emulator.

As far as hardware is concerned, all AMD and Intel microprocessors are supported that support 16/20 bit real mode, that have a clock frequency of no less than 667 MHZ, that have at least 600 KB of free conventional RAM. The PC must has a VGA graphics card or MCGA compatible or emulated. As regards the memory occupation on the hard disk or SD card, it is almost always between 5 MB and 15 MB.

All my programs have dedicated software of my own invention for managing peripherals, such as the video card, sound card, keyboard and mouse; furthermore they are made up of a single thread with polling technology which sorts the various phases of the process progress based on various indices and according to certain events. it is modular software, so even if there is only one thread there are methods called by it that behave like other threads and contribute to the progress of portions of the process.

Windows 10 and Windows 11 messages such as "This file may be dangerous", "author unknown" or "The file is suspicious. Virus scanning. The file has been sent to the analysis department, please wait... The file appears safe", they are warnings that can be displayed the first time my software is run and which depend on a priori protection mechanisms by the operating system and antivirus manufacturers, but above all on the unusual structure of my programs published here.

(*) the latest version of WinRAR was mainly used, but in older programs it is possible that previous versions are still used.

(**) the Inno Setup Compiler 6.2.0 (a) version was mainly used, but in older programs the Inno Setup Compiler 5.5.1 (a) version may still be used.

(***) except for most .WAV file(s) which not contain more than the first 30 seconds of music from other sources (old Commodore 64 soundtracks, copyright-free files converted from MIDI, but also author's music: only the first 30 seconds of the instrumental part of the song). Some cover images and other images in the devlog sections were not entirely created by me but from images downloaded from the Internet and modified.

Messages from Windows 10, Windows 11 and some antiviruses (Avast):

Such notifications or warnings may be displayed, not for all versions of Windows and installed antivirus programs, during installation via the setup file or when first running the game or utility of a newly purchased or free downloaded .ZIP archive.

"This file may be dangerous": generic message that considers any executable file or archive containing some and coming from the Internet as a dangerous file that should not be installed.

"Author unknown": message that simply warns that the (c) CopyRight international registration has not been carried out and that the software does not come from a recognized software house.

Although this is authentic software, developed entirely by me, not having enough money to invest for copyright registration, this should be normal; with all the software developers in the world I don't think they all have had this opportunity.

"Allow the running app to make changes to your computer?" is a generic message that simply indicates that a "setup" executable file has been opened.

"The file is suspicious. Antivirus analysis. The file has been sent to the analysis department, please wait... The file seems safe": Some antiviruses, given the somewhat unusual structure of my games (screensaver style), notice that they not appear to have any interaction with the user, since they do not use default methods of accessing devices, and note that the behavior is similar to that of some computer viruses running in the background. In any case, I am not a hacker nor have I ever thought of causing damage, nor of stealing information or stealing money, nor of decoding or deprotecting other people's programs, nor of developing harmful software, much less viruses; any check for malware or viruses in my programs will result as clean.

Paolo Fassin (PCDear.ent.games)