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js: Add a comment explaining the two halves of the key-matching code

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Ben Harris
2022-10-25 00:50:47 +01:00
parent d94d671bf9
commit 43c89dd5e1
1 changed files with 6 additions and 0 deletions
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6
emcc.c
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@ -310,6 +310,12 @@ void key(int keycode, const char *key, const char *chr, int location,
else if (key && (unsigned char)key[0] < 0x80 && key[1] == '\0')
/* Key generating a single ASCII character. */
keyevent = key[0];
/*
* In modern browsers (since about 2017), all keys that Puzzles
* cares about should be matched by one of the clauses above. The
* code below that checks keycode and chr should be relavent only
* in older browsers.
*/
else if (keycode == 8 || keycode == 46)
keyevent = 127; /* Backspace / Delete */
else if (keycode == 13)