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9 changes: 6 additions & 3 deletions js/src/util.js
Original file line number Diff line number Diff line change
Expand Up @@ -106,19 +106,22 @@ const Util = (($) => {
},

getTransitionDurationFromElement(element) {
if (!element) {
return 0
}

// Get transition-duration of the element
let transitionDuration = $(element).css('transition-duration')
const floatTransitionDuration = parseFloat(transitionDuration)

// Return 0 if element or transition duration is not found
if (!transitionDuration) {
if (!floatTransitionDuration) {
return 0
}

// If multiple durations are defined, take the first
transitionDuration = transitionDuration.split(',')[0]

// jQuery always converts transition durations into seconds,
// so multiply by 1000
return parseFloat(transitionDuration) * MILLISECONDS_MULTIPLIER
},

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19 changes: 5 additions & 14 deletions js/tests/unit/util.js
Original file line number Diff line number Diff line change
Expand Up @@ -46,44 +46,35 @@ $(function () {
assert.expect(1)
var $div = $('<div style="transition: all 300ms ease-out;"></div>').appendTo($('#qunit-fixture'))

assert.strictEqual(Util.getTransitionDurationFromElement($div), 300)
assert.strictEqual(Util.getTransitionDurationFromElement($div[0]), 300)
})

QUnit.test('Util.getTransitionDurationFromElement should accept transition durations in seconds', function (assert) {
assert.expect(1)
var $div = $('<div style="transition: all .4s ease-out;"></div>').appendTo($('#qunit-fixture'))

assert.strictEqual(Util.getTransitionDurationFromElement($div), 400)
assert.strictEqual(Util.getTransitionDurationFromElement($div[0]), 400)
})

QUnit.test('Util.getTransitionDurationFromElement should get the first transition duration if multiple transition durations are defined', function (assert) {
assert.expect(1)
var $div = $('<div style="transition: transform .3s ease-out, opacity .2s;"></div>').appendTo($('#qunit-fixture'))

assert.strictEqual(Util.getTransitionDurationFromElement($div), 300)
assert.strictEqual(Util.getTransitionDurationFromElement($div[0]), 300)
})

QUnit.test('Util.getTransitionDurationFromElement should return 0 if transition duration is not defined', function (assert) {
assert.expect(1)
var $div = $('<div></div>').appendTo($('#qunit-fixture'))

assert.strictEqual(Util.getTransitionDurationFromElement($div), 0)
assert.strictEqual(Util.getTransitionDurationFromElement($div[0]), 0)
})

QUnit.test('Util.getTransitionDurationFromElement should return 0 if element is not found in DOM', function (assert) {
assert.expect(1)
var $div = $('#fake-id')

assert.strictEqual(Util.getTransitionDurationFromElement($div), 0)
})

QUnit.test('Util.getTransitionDurationFromElement should properly handle inherited transition durations', function (assert) {
assert.expect(1)
var $parent = $('<div style="transition-duration: 5s;"></div>')
var $child = $('<div style="transition-duration: inherit;"></div>')
$('#qunit-fixture').append($parent.append($child))

assert.strictEqual(Util.getTransitionDurationFromElement($child), 5000)
assert.strictEqual(Util.getTransitionDurationFromElement($div[0]), 0)
})

QUnit.test('Util.getUID should generate a new id uniq', function (assert) {
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