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describe('__initializeTriggers unit tests', function() {
function mockTriggerButton(triggerSpec, callback) {
const btn = createHTMLNoProcessing(`<button hx-trigger="${triggerSpec}">Demo</button>`);
btn._htmx = {}
htmx.__initializeTriggers(btn, callback)
return btn;
}
function mockTriggerElement(html, callback) {
const elt = createDisconnectedHTML(html);
elt._htmx = {}
htmx.__initializeTriggers(elt, callback)
return elt;
}
it('basic trigger should work', function() {
let called = false
const btn = mockTriggerButton("", () => called = true);
btn.click()
assert.equal(true, called)
});
it('once should only trigger once', function() {
let called = 0
const btn = mockTriggerButton("click once", () => called++);
btn.click()
assert.equal(1, called)
btn.click()
assert.equal(1, called)
});
it('default trigger for button is click', function() {
let called = 0
const btn = mockTriggerElement('<button>Test</button>', () => called++);
btn.click()
assert.equal(1, called)
});
it('default trigger for form is submit', function() {
let called = 0
const form = mockTriggerElement('<form></form>', () => called++);
form.dispatchEvent(new Event('submit'))
assert.equal(1, called)
});
it('default trigger for input is change', function() {
let called = 0
const input = mockTriggerElement('<input type="text">', () => called++);
input.dispatchEvent(new Event('change'))
assert.equal(1, called)
});
it('default trigger for select is change', function() {
let called = 0
const select = mockTriggerElement('<select></select>', () => called++);
select.dispatchEvent(new Event('change'))
assert.equal(1, called)
});
it('default trigger for textarea is change', function() {
let called = 0
const textarea = mockTriggerElement('<textarea></textarea>', () => called++);
textarea.dispatchEvent(new Event('change'))
assert.equal(1, called)
});
it('delay modifier delays execution', function(done) {
let called = false
const btn = mockTriggerButton("click delay:50ms", () => called = true);
btn.click()
assert.equal(false, called)
setTimeout(() => {
assert.equal(true, called)
done()
}, 100)
});
it('delay modifier resets on subsequent triggers', function(done) {
let called = 0
const btn = mockTriggerButton("click delay:50ms", () => called++);
btn.click()
setTimeout(() => btn.click(), 30)
setTimeout(() => {
assert.equal(1, called)
done()
}, 120)
});
it('throttle modifier limits execution frequency', function(done) {
let called = 0
const btn = mockTriggerButton("click throttle:100ms", () => called++);
btn.click()
btn.click()
btn.click()
assert.equal(1, called)
setTimeout(() => {
assert.equal(2, called)
done()
}, 150)
});
it('target modifier filters events by target selector', function() {
let called = 0
const div = createProcessedHTML('<div hx-trigger="click target:.target" hx-action="js:null"><button class="target">Target</button><button>Other</button></div>');
htmx.__initializeTriggers(div, () => called++);
div.querySelector('.target').click()
assert.equal(1, called)
div.querySelector('button:not(.target)').click()
assert.equal(1, called)
});
it('consume modifier stops event propagation', function() {
let innerCalled = 0;
let outerCalled = 0;
const outer = createProcessedHTML('<div id="outer"><button hx-action="js:null" hx-trigger="click consume" id="inner">Test</button></div>');
outer.addEventListener('click', () => outerCalled++)
const inner = outer.querySelector('#inner')
inner.addEventListener('click', () => innerCalled++)
inner.click()
assert.equal(1, innerCalled)
assert.equal(0, outerCalled)
});
it('changed modifier only triggers when value changes', function() {
let called = 0
const input = mockTriggerElement('<input type="text" hx-trigger="input changed">', () => called++);
input.value = 'test'
input.dispatchEvent(new Event('input'))
assert.equal(1, called)
input.dispatchEvent(new Event('input'))
assert.equal(1, called)
input.value = 'changed'
input.dispatchEvent(new Event('input'))
assert.equal(2, called)
});
it('event filter evaluates condition', function() {
let called = 0
const btn = mockTriggerButton("click[shiftKey]", () => called++);
let mouseEvent1 = new CustomEvent('click');
mouseEvent1.shiftKey = false
btn.dispatchEvent(mouseEvent1)
assert.equal(0, called)
let mouseEvent = new CustomEvent('click');
mouseEvent.shiftKey = true
btn.dispatchEvent(mouseEvent)
assert.equal(1, called)
});
it('from modifier listens on different element', function() {
let called = 0
const container = createHTMLNoProcessing('<div><button id="source">Source</button><div id="target"></div></div>');
const target = container.querySelector('#target')
const source = container.querySelector('#source')
target._htmx = {}
target.setAttribute('hx-trigger', 'click from:#source')
htmx.__initializeTriggers(target, () => called++);
target.click()
assert.equal(0, called)
source.click()
assert.equal(1, called)
});
it('multiple triggers separated by comma', function() {
let called = 0
const btn = mockTriggerButton("click, mouseenter", () => called++);
btn.click()
assert.equal(1, called)
btn.dispatchEvent(new Event('mouseenter'))
assert.equal(2, called)
});
it('every trigger polls at interval', async function () {
let called = 0
mockTriggerButton("every 10ms", () => called++);
await htmx.timeout(50);
assert.isAtLeast(called, 2)
});
it('revealed trigger fires once on revealed', function() {
let called = 0;
const div = createProcessedHTML('<div hx-action="js:null" hx-trigger="revealed">Test</div>');
htmx.__initializeTriggers(div, () => called++);
htmx.trigger(div, "intersect");
assert.equal(1, called)
});
it('revealed trigger fires multiple times on on intersection', function() {
let called = 0;
const div = createProcessedHTML('<div hx-action="js:null" hx-trigger="intersect">Test</div>');
htmx.__initializeTriggers(div, () => called++);
htmx.trigger(div, "intersect");
assert.equal(1, called)
htmx.trigger(div, "intersect");
assert.equal(2, called)
});
});
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