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authortoasted-nutbread <toasted-nutbread@users.noreply.github.com>2019-10-02 20:57:48 -0400
committertoasted-nutbread <toasted-nutbread@users.noreply.github.com>2019-10-02 21:12:24 -0400
commit7380ada1f12c382d423133c2e9142f36a6634067 (patch)
treec4f29eedf1c30654d7d2e237710b1aab47b22699 /ext/mixed/js/display.js
parent0d6177398d0a738430a555ce307ba0a61c15bf9a (diff)
Simplify onWheel handler
Diffstat (limited to 'ext/mixed/js/display.js')
-rw-r--r--ext/mixed/js/display.js18
1 files changed, 5 insertions, 13 deletions
diff --git a/ext/mixed/js/display.js b/ext/mixed/js/display.js
index eb40a5df..dc64dbea 100644
--- a/ext/mixed/js/display.js
+++ b/ext/mixed/js/display.js
@@ -161,20 +161,12 @@ class Display {
}
onWheel(e) {
- const handler = () => {
- if (e.altKey) {
- if (e.deltaY < 0) { // scroll up
- this.entryScrollIntoView(this.index - 1, null, true);
- return true;
- } else if (e.deltaY > 0) { // scroll down
- this.entryScrollIntoView(this.index + 1, null, true);
- return true;
- }
+ if (e.altKey) {
+ const delta = e.deltaY;
+ if (delta !== 0) {
+ this.entryScrollIntoView(this.index + (delta > 0 ? 1 : -1), null, true);
+ e.preventDefault();
}
- };
-
- if (handler()) {
- e.preventDefault();
}
}