Magento2.1.7 Change Custom Option Value

[mincovip]

Hello,

I want to change custom option value and 

I have added new attribute about 'disabled' and edited the option value in 'vendor\magento\module-catalog\Block\Product\View\Options\Type\Select.php' file.   

The html result is not ok ,  the disabled attribute have added but the option value don't change.    Why ?     Could you help me to fix it? 

screenshot  below:

source codefrontend html

[mincovip]

Any guys help me ?  

[Damian Culotta]

Hi @mincovip,

First of all is a really bad idea to change some core class. Next time you try to update you'll override your own changes.

Now, can you explain a little bit more about the new behavior you're trying to obtain?

[mincovip]

Hi  @Damian Culotta,

Thanks for you reply.

Yes, it's bad idea to change core class.   

I just want to change the option display effect.

For example, change the option value,    how to get the display effect ?  display effect

[mincovip]

Who can help me ?