`ERROR: Unhandled error: Uncaught TypeError` when setting custom keyboard shortcut in viewer

[Kal Sze]

calibre, version 4.7.0
macOS Mojave 10.14.6

ERROR: Unhandled error: Uncaught TypeError: onchange is not a function<br><span style="font-size:smaller">Error at userscript:viewer.js:26122:17</span>

Traceback (most recent call last):
    at HTMLAnchorElement.ρσ_anonfunc (userscript:viewer.js:16477:54)
    at close_customize_shortcut (userscript:viewer.js:25972:17)
    at commit_keyboard (userscript:viewer.js:26122:17)
TypeError: onchange is not a function

Steps that led to this error:
1. Open an ePub in Calibre's viewer;
2. Right-click in the window to bring up the options menu;
3. Click "Preferences";
4. Click "Keyboard shortcuts";
5. Click "Scroll forwards by screen-fulls";
6. Click "Add a new shortcut";
7. Press the right arrow key to get ArrowRight;
8. Click "OK";

[Kovid Goyal (kovid)]

Fixed in branch master. The fix will be in the next release. calibre is usually released every alternate Friday.

 status fixreleased