crafted by photobiz
var Modal = (function() {
var trigger = $qsa('.modal__trigger'); // what you click to activate the modal
var modals = $qsa('.modal'); // the entire modal (takes up entire window)
var modalsbg = $qsa('.modal__bg'); // the entire modal (takes up entire window)
var content = $qsa('.modal__content'); // the inner content of the modal
var closers = $qsa('.modal__close'); // an element used to close the modal
var w = window;
var isOpen = false;
var contentDelay = 400; // duration after you click the button and wait for the content to show
var len = trigger.length;
// make it easier for yourself by not having to type as much to select an element
function $qsa(el) {
return document.querySelectorAll(el);
}
var getId = function(event) {
event.preventDefault();
var self = this;
// get the value of the data-modal attribute from the button
var modalId = self.dataset.modal;
var len = modalId.length;
// remove the '#' from the string
var modalIdTrimmed = modalId.substring(1, len);
// select the modal we want to activate
var modal = document.getElementById(modalIdTrimmed);
// execute function that creates the temporary expanding div
makeDiv(self, modal);
};
var makeDiv = function(self, modal) {
var fakediv = document.getElementById('modal__temp');
/**
* if there isn't a 'fakediv', create one and append it to the button that was
* clicked. after that execute the function 'moveTrig' which handles the animations.
*/
if (fakediv === null) {
var div = document.createElement('div');
div.id = 'modal__temp';
self.appendChild(div);
moveTrig(self, modal, div);
}
};
var moveTrig = function(trig, modal, div) {
var trigProps = trig.getBoundingClientRect();
var m = modal;
var mProps = m.querySelector('.modal__content').getBoundingClientRect();
var transX, transY, scaleX, scaleY;
var xc = w.innerWidth / 2;
var yc = w.innerHeight / 2;
// this class increases z-index value so the button goes overtop the other buttons
trig.classList.add('modal__trigger--active');
// these values are used for scale the temporary div to the same size as the modal
scaleX = mProps.width / trigProps.width;
scaleY = mProps.height / trigProps.height;
scaleX = scaleX.toFixed(3); // round to 3 decimal places
scaleY = scaleY.toFixed(3);
// these values are used to move the button to the center of the window
transX = Math.round(xc - trigProps.left - trigProps.width / 2);
transY = Math.round(yc - trigProps.top - trigProps.height / 2);
// if the modal is aligned to the top then move the button to the center-y of the modal instead of the window
if (m.classList.contains('modal--align-top')) {
transY = Math.round(mProps.height / 2 + mProps.top - trigProps.top - trigProps.height / 2);
}
// translate button to center of screen
trig.style.transform = 'translate(' + transX + 'px, ' + transY + 'px)';
trig.style.webkitTransform = 'translate(' + transX + 'px, ' + transY + 'px)';
// expand temporary div to the same size as the modal
div.style.transform = 'scale(' + scaleX + ',' + scaleY + ')';
div.style.webkitTransform = 'scale(' + scaleX + ',' + scaleY + ')';
window.setTimeout(function() {
window.requestAnimationFrame(function() {
open(m, div);
});
}, contentDelay);
};
var open = function(m, div) {
if (!isOpen) {
// select the content inside the modal
var content = m.querySelector('.modal__content');
// reveal the modal
m.classList.add('modal--active');
// reveal the modal content
content.classList.add('modal__content--active');
/**
* when the modal content is finished transitioning, fadeout the temporary
* expanding div so when the window resizes it isn't visible ( it doesn't
* move with the window).
*/
content.addEventListener('transitionend', hideDiv, false);
isOpen = true;
}
function hideDiv() {
// fadeout div so that it can't be seen when the window is resized
div.style.opacity = '0';
content.removeEventListener('transitionend', hideDiv, false);
}
};
var close = function(event) {
event.preventDefault();
event.stopImmediatePropagation();
var target = event.target;
var div = document.getElementById('modal__temp');
/**
* make sure the modal__bg or modal__close was clicked, we don't want to be able to click
* inside the modal and have it close.
*/
if (isOpen && target.classList.contains('modal__bg') || target.classList.contains('modal__close')) {
// make the hidden div visible again and remove the transforms so it scales back to its original size
div.style.opacity = '1';
div.removeAttribute('style');
/**
* iterate through the modals and modal contents and triggers to remove their active classes.
* remove the inline css from the trigger to move it back into its original position.
*/
for (var i = 0; i < len; i++) {
modals[i].classList.remove('modal--active');
content[i].classList.remove('modal__content--active');
trigger[i].style.transform = 'none';
trigger[i].style.webkitTransform = 'none';
trigger[i].classList.remove('modal__trigger--active');
}
// when the temporary div is opacity:1 again, we want to remove it from the dom
div.addEventListener('transitionend', removeDiv, false);
isOpen = false;
}
function removeDiv() {
setTimeout(function() {
window.requestAnimationFrame(function() {
// remove the temp div from the dom with a slight delay so the animation looks good
div.remove();
});
}, contentDelay - 50);
}
};
var bindActions = function() {
for (var i = 0; i < len; i++) {
trigger[i].addEventListener('click', getId, false);
closers[i].addEventListener('click', close, false);
modalsbg[i].addEventListener('click', close, false);
}
};
var init = function() {
bindActions();
};
return {
init: init
};
}());
Modal.init();
