|
Last change
on this file since 6c1585f was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
|
initial commit
|
-
Property mode
set to
100644
|
|
File size:
485 bytes
|
| Line | |
|---|
| 1 | function incrementListIndex(current, dir, opt) {
|
|---|
| 2 | const len = opt.choices.realLength;
|
|---|
| 3 | const shouldLoop = 'loop' in opt ? Boolean(opt.loop) : true;
|
|---|
| 4 | if (dir === 'up') {
|
|---|
| 5 | if (current > 0) {
|
|---|
| 6 | return current - 1;
|
|---|
| 7 | }
|
|---|
| 8 | return shouldLoop ? len - 1 : current;
|
|---|
| 9 | }
|
|---|
| 10 | if (dir === 'down') {
|
|---|
| 11 | if (current < len - 1) {
|
|---|
| 12 | return current + 1;
|
|---|
| 13 | }
|
|---|
| 14 | return shouldLoop ? 0 : current;
|
|---|
| 15 | }
|
|---|
| 16 | throw new Error('dir must be up or down');
|
|---|
| 17 | }
|
|---|
| 18 |
|
|---|
| 19 | module.exports = incrementListIndex;
|
|---|
Note:
See
TracBrowser
for help on using the repository browser.
