Zero-width character test

Below are 34 zero-width Unicode characters, placed between underscores. Does your browser display them? Your text editor? Your terminal? To understand why not displaying them might be a problem, read:

Tracking via pasted text

As a point of reference, here are a few positive-width Unicode characters:

0020: _ _ | 00E9: _é_ | 03A9: _Ω_ | 5B57: _字_ | 1F407: _🐇_

Zero-width characters

 061C: _؜_

 180E: _᠎_

 200B: _​_
 200C: _‌_
 200D: _‍_
 200E: _‎_
 200F: _‏_

 202A: _‪_
 202B: _‫_
 202C: _‬_
 202D: _‭_
 202E: _‮_

 2060: _⁠_
 2061: _⁡_
 2062: _⁢_
 2063: _⁣_
 2064: _⁤_
 2066: _⁦_
 2067: _⁧_
 2068: _⁨_
 2069: _⁩_

 206A: __
 206B: __
 206C: __
 206D: __
 206E: __
 206F: __

 FEFF: __
 FFF9: __
 FFFA: __
 FFFB: __

E0001: _󠀁_

E0020: _󠀠_
... (E0020–E007F formerly used for tagging texts by language)
E007F: _󠁿_

This is probably not a complete list. Contact me if you know of any others.

As of February 2020, Unicode contains 143,859 characters.

Unicode Character Database

Programs which pass the test

Contact me if you know of any others.

This test is also available as a plain .txt file.