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Fix: calling event.preventDefault() on not cancelable events produces errors

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sasensi 2018-10-02 10:31:49 +02:00
parent cb9fbd7789
commit 54e1a0c1ef
1 changed files with 5 additions and 1 deletions
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6
src/view/View.js
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@ -1440,7 +1440,11 @@ new function() { // Injection scope for event handling on the browser
// which can call `preventDefault()` explicitly or return `false`. // which can call `preventDefault()` explicitly or return `false`.
// - If this is a unhandled mousedown event, but the view or tools // - If this is a unhandled mousedown event, but the view or tools
// respond to mouseup. // respond to mouseup.
if (called && !mouse.move || mouse.down && responds('mouseup')) //
// Some events are not cancelable anyway (like during a scroll inertia
// on mobile) so trying to prevent default in those case would result
// in no effect and an error.
if (event.cancelable !== false && (called && !mouse.move || mouse.down && responds('mouseup')))
event.preventDefault(); event.preventDefault();
}, },