The original intention was to recreate Vue's core functionality with very little code,
So I set a target of 50 lines or less,
But the rules of line feed are not easy to define,
And I found ...
You can replace all if-else statements with ternary operators,
All for loops are replaced by methods,
All variable declarations are placed in the properties of a object...
This is where things get weird,
The code will become difficult to read and maintain.
Performance is also affected.
But I did the stupid thing anyway.