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fix: fireworks & snow improvements

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xHyroM 2023-04-01 12:05:47 +02:00
parent e634f07d3e
commit 8b882691d2
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4 changed files with 369 additions and 316 deletions
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3
src/components/widgets/Fireworks.astro
View file

@ -1,3 +1,6 @@
<div class="fireworks-container absolute top-0 left-0 z-[-1000] h-full w-full">
</div>
<script> <script>
import { Fireworks } from "fireworks-js"; import { Fireworks } from "fireworks-js";

2
src/components/widgets/Snow.astro
View file

@ -1,3 +1,5 @@
<div class="snow-container absolute top-0 left-0 z-[-1000] h-full w-full"></div>
<script> <script>
import "../../scripts/snow.js"; import "../../scripts/snow.js";
</script> </script>

5
src/layouts/Layout.astro
View file

@ -23,10 +23,7 @@ const Head = head || DefaultHead;
</head> </head>
<body class="overflow-x-hidden bg-dark font-sans"> <body class="overflow-x-hidden bg-dark font-sans">
<slot /> <slot />
<div
class="fireworks-container absolute top-0 left-0 z-[-1000] h-full w-full"
>
</div>
<script> <script>
import "../scripts/menu.js"; import "../scripts/menu.js";
</script> </script>

317
src/scripts/snow.js
View file

@ -25,8 +25,8 @@ class SnowStorm {
this.excludeMobile = true; // Snow is likely to be bad news for mobile phones' CPUs (and batteries.) By default, be nice. this.excludeMobile = true; // Snow is likely to be bad news for mobile phones' CPUs (and batteries.) By default, be nice.
this.flakeBottom = null; // Integer for Y axis snow limit, 0 or null for "full-screen" snow effect this.flakeBottom = null; // Integer for Y axis snow limit, 0 or null for "full-screen" snow effect
this.followMouse = false; // Snow movement can respond to the user's mouse this.followMouse = false; // Snow movement can respond to the user's mouse
this.snowColor = '#fff'; // Don't eat (or use?) yellow snow. this.snowColor = "#fff"; // Don't eat (or use?) yellow snow.
this.snowCharacter = '&bull;'; // &bull; = bullet, &middot; is square on some systems etc. this.snowCharacter = "&bull;"; // &bull; = bullet, &middot; is square on some systems etc.
this.snowStick = true; // Whether or not snow should "stick" at the bottom. When off, will never collect. this.snowStick = true; // Whether or not snow should "stick" at the bottom. When off, will never collect.
this.targetElement = null; // element which snow will be appended to (null = document.body) - can be an element ID eg. 'myDiv', or a DOM node reference this.targetElement = null; // element which snow will be appended to (null = document.body) - can be an element ID eg. 'myDiv', or a DOM node reference
this.useMeltEffect = true; // When recycling fallen snow (or rarely, when falling), have it "melt" and fade out if browser supports it this.useMeltEffect = true; // When recycling fallen snow (or rarely, when falling), have it "melt" and fade out if browser supports it
@ -53,9 +53,15 @@ class SnowStorm {
isIE = navigator.userAgent.match(/msie/i), isIE = navigator.userAgent.match(/msie/i),
isIE6 = navigator.userAgent.match(/msie 6/i), isIE6 = navigator.userAgent.match(/msie 6/i),
isMobile = navigator.userAgent.match(/mobile|opera m(ob|in)/i), isMobile = navigator.userAgent.match(/mobile|opera m(ob|in)/i),
isBackCompatIE = (isIE && document.compatMode === 'BackCompat'), isBackCompatIE = isIE && document.compatMode === "BackCompat",
noFixed = (isBackCompatIE || isIE6), noFixed = isBackCompatIE || isIE6,
screenX = null, screenX2 = null, screenY = null, scrollY = null, docHeight = null, vRndX = null, vRndY = null, screenX = null,
screenX2 = null,
screenY = null,
scrollY = null,
docHeight = null,
vRndX = null,
vRndY = null,
windOffset = 1, windOffset = 1,
windMultiplier = 2, windMultiplier = 2,
flakeTypes = 6, flakeTypes = 6,
@ -63,17 +69,16 @@ class SnowStorm {
targetElementIsRelative = false, targetElementIsRelative = false,
opacitySupported = (function () { opacitySupported = (function () {
try { try {
document.createElement('div').style.opacity = '0.5'; document.createElement("div").style.opacity = "0.5";
} catch (e) { } catch (e) {
return false; return false;
} }
return true; return true;
}()), })(),
didInit = false, didInit = false,
docFrag = document.createDocumentFragment(); docFrag = document.createDocumentFragment();
features = (function () { features = (function () {
var getAnimationFrame; var getAnimationFrame;
/** /**
@ -86,59 +91,56 @@ class SnowStorm {
window.setTimeout(callback, 1000 / (storm.animationInterval || 20)); window.setTimeout(callback, 1000 / (storm.animationInterval || 20));
} }
var _animationFrame = (window.requestAnimationFrame || var _animationFrame =
window.requestAnimationFrame ||
window.webkitRequestAnimationFrame || window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame || window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame || window.oRequestAnimationFrame ||
window.msRequestAnimationFrame || window.msRequestAnimationFrame ||
timeoutShim); timeoutShim;
// apply to window, avoid "illegal invocation" errors in Chrome // apply to window, avoid "illegal invocation" errors in Chrome
getAnimationFrame = _animationFrame ? function() { getAnimationFrame = _animationFrame
? function () {
return _animationFrame.apply(window, arguments); return _animationFrame.apply(window, arguments);
} : null; }
: null;
var testDiv; var testDiv;
testDiv = document.createElement('div'); testDiv = document.createElement("div");
function has(prop) { function has(prop) {
// test for feature support // test for feature support
var result = testDiv.style[prop]; var result = testDiv.style[prop];
return (result !== undefined ? prop : null); return result !== undefined ? prop : null;
} }
// note local scope. // note local scope.
var localFeatures = { var localFeatures = {
transform: { transform: {
ie: has('-ms-transform'), ie: has("-ms-transform"),
moz: has('MozTransform'), moz: has("MozTransform"),
opera: has('OTransform'), opera: has("OTransform"),
webkit: has('webkitTransform'), webkit: has("webkitTransform"),
w3: has('transform'), w3: has("transform"),
prop: null // the normalized property value prop: null, // the normalized property value
}, },
getAnimationFrame: getAnimationFrame getAnimationFrame: getAnimationFrame,
}; };
localFeatures.transform.prop = ( localFeatures.transform.prop =
localFeatures.transform.w3 || localFeatures.transform.w3 ||
localFeatures.transform.moz || localFeatures.transform.moz ||
localFeatures.transform.webkit || localFeatures.transform.webkit ||
localFeatures.transform.ie || localFeatures.transform.ie ||
localFeatures.transform.opera localFeatures.transform.opera;
);
testDiv = null; testDiv = null;
return localFeatures; return localFeatures;
})();
}());
this.timer = null; this.timer = null;
this.flakes = []; this.flakes = [];
@ -148,54 +150,43 @@ class SnowStorm {
this.meltFrames = []; this.meltFrames = [];
this.setXY = function (o, x, y) { this.setXY = function (o, x, y) {
if (!o) { if (!o) {
return false; return false;
} }
if (storm.usePixelPosition || targetElementIsRelative) { if (storm.usePixelPosition || targetElementIsRelative) {
o.style.left = x - storm.flakeWidth + "px";
o.style.left = (x - storm.flakeWidth) + 'px'; o.style.top = y - storm.flakeHeight + "px";
o.style.top = (y - storm.flakeHeight) + 'px';
} else if (noFixed) { } else if (noFixed) {
o.style.right = 100 - (x / screenX) * 100 + "%";
o.style.right = (100-(x/screenX*100)) + '%';
// avoid creating vertical scrollbars // avoid creating vertical scrollbars
o.style.top = (Math.min(y, docHeight-storm.flakeHeight)) + 'px'; o.style.top = Math.min(y, docHeight - storm.flakeHeight) + "px";
} else { } else {
if (!storm.flakeBottom) { if (!storm.flakeBottom) {
// if not using a fixed bottom coordinate... // if not using a fixed bottom coordinate...
o.style.right = (100-(x/screenX*100)) + '%'; o.style.right = 100 - (x / screenX) * 100 + "%";
o.style.bottom = (100-(y/screenY*100)) + '%'; o.style.bottom = 100 - (y / screenY) * 100 + "%";
} else { } else {
// absolute top. // absolute top.
o.style.right = (100-(x/screenX*100)) + '%'; o.style.right = 100 - (x / screenX) * 100 + "%";
o.style.top = (Math.min(y, docHeight-storm.flakeHeight)) + 'px'; o.style.top = Math.min(y, docHeight - storm.flakeHeight) + "px";
} }
} }
}; };
this.events = (function () { this.events = (function () {
var old = !window.addEventListener && window.attachEvent,
var old = (!window.addEventListener && window.attachEvent), slice = Array.prototype.slice, slice = Array.prototype.slice,
evt = { evt = {
add: (old?'attachEvent':'addEventListener'), add: old ? "attachEvent" : "addEventListener",
remove: (old?'detachEvent':'removeEventListener') remove: old ? "detachEvent" : "removeEventListener",
}; };
function getArgs(oArgs) { function getArgs(oArgs) {
var args = slice.call(oArgs), len = args.length; var args = slice.call(oArgs),
len = args.length;
if (old) { if (old) {
args[1] = 'on' + args[1]; // prefix args[1] = "on" + args[1]; // prefix
if (len > 3) { if (len > 3) {
args.pop(); // no capture args.pop(); // no capture
} }
@ -216,29 +207,28 @@ class SnowStorm {
} }
function addEvent() { function addEvent() {
apply(getArgs(arguments), 'add'); apply(getArgs(arguments), "add");
} }
function removeEvent() { function removeEvent() {
apply(getArgs(arguments), 'remove'); apply(getArgs(arguments), "remove");
} }
return { return {
add: addEvent, add: addEvent,
remove: removeEvent remove: removeEvent,
}; };
})();
}());
function rnd(n, min) { function rnd(n, min) {
if (isNaN(min)) { if (isNaN(min)) {
min = 0; min = 0;
} }
return (Math.random()*n)+min; return Math.random() * n + min;
} }
function plusMinus(n) { function plusMinus(n) {
return (parseInt(rnd(2),10)===1?n*-1:n); return parseInt(rnd(2), 10) === 1 ? n * -1 : n;
} }
this.randomizeWind = function () { this.randomizeWind = function () {
@ -257,7 +247,14 @@ class SnowStorm {
this.scrollHandler = function () { this.scrollHandler = function () {
var i; var i;
// "attach" snowflakes to bottom of window if no absolute bottom value was given // "attach" snowflakes to bottom of window if no absolute bottom value was given
scrollY = (storm.flakeBottom ? 0 : parseInt(window.scrollY || document.documentElement.scrollTop || (noFixed ? document.body.scrollTop : 0), 10)); scrollY = storm.flakeBottom
? 0
: parseInt(
window.scrollY ||
document.documentElement.scrollTop ||
(noFixed ? document.body.scrollTop : 0),
10
);
if (isNaN(scrollY)) { if (isNaN(scrollY)) {
scrollY = 0; // Netscape 6 scroll fix scrollY = 0; // Netscape 6 scroll fix
} }
@ -273,10 +270,19 @@ class SnowStorm {
this.resizeHandler = function () { this.resizeHandler = function () {
if (window.innerWidth || window.innerHeight) { if (window.innerWidth || window.innerHeight) {
screenX = window.innerWidth - 16 - storm.flakeRightOffset; screenX = window.innerWidth - 16 - storm.flakeRightOffset;
screenY = (storm.flakeBottom || window.innerHeight); screenY = storm.flakeBottom || window.innerHeight;
} else { } else {
screenX = (document.documentElement.clientWidth || document.body.clientWidth || document.body.scrollWidth) - (!isIE ? 8 : 0) - storm.flakeRightOffset; screenX =
screenY = storm.flakeBottom || document.documentElement.clientHeight || document.body.clientHeight || document.body.scrollHeight; (document.documentElement.clientWidth ||
document.body.clientWidth ||
document.body.scrollWidth) -
(!isIE ? 8 : 0) -
storm.flakeRightOffset;
screenY =
storm.flakeBottom ||
document.documentElement.clientHeight ||
document.body.clientHeight ||
document.body.scrollHeight;
} }
docHeight = document.body.offsetHeight; docHeight = document.body.offsetHeight;
screenX2 = parseInt(screenX / 2, 10); screenX2 = parseInt(screenX / 2, 10);
@ -328,17 +334,17 @@ class SnowStorm {
var i; var i;
this.freeze(); this.freeze();
for (i = 0; i < this.flakes.length; i++) { for (i = 0; i < this.flakes.length; i++) {
this.flakes[i].o.style.display = 'none'; this.flakes[i].o.style.display = "none";
} }
storm.events.remove(window,'scroll',storm.scrollHandler); storm.events.remove(window, "scroll", storm.scrollHandler);
storm.events.remove(window,'resize',storm.resizeHandler); storm.events.remove(window, "resize", storm.resizeHandler);
if (storm.freezeOnBlur) { if (storm.freezeOnBlur) {
if (isIE) { if (isIE) {
storm.events.remove(document,'focusout',storm.freeze); storm.events.remove(document, "focusout", storm.freeze);
storm.events.remove(document,'focusin',storm.resume); storm.events.remove(document, "focusin", storm.resume);
} else { } else {
storm.events.remove(window,'blur',storm.freeze); storm.events.remove(window, "blur", storm.freeze);
storm.events.remove(window,'focus',storm.resume); storm.events.remove(window, "focus", storm.resume);
} }
} }
}; };
@ -346,7 +352,7 @@ class SnowStorm {
this.show = function () { this.show = function () {
var i; var i;
for (i = 0; i < this.flakes.length; i++) { for (i = 0; i < this.flakes.length; i++) {
this.flakes[i].o.style.display = 'block'; this.flakes[i].o.style.display = "block";
} }
}; };
@ -354,7 +360,7 @@ class SnowStorm {
var s = this; var s = this;
this.type = type; this.type = type;
this.x = x || parseInt(rnd(screenX - 20), 10); this.x = x || parseInt(rnd(screenX - 20), 10);
this.y = (!isNaN(y)?y:-rnd(screenY)-12); this.y = !isNaN(y) ? y : -rnd(screenY) - 12;
this.vX = null; this.vX = null;
this.vY = null; this.vY = null;
this.vAmpTypes = [1, 1.2, 1.4, 1.6, 1.8]; // "amplification" for vX/vY (based on flake size/type) this.vAmpTypes = [1, 1.2, 1.4, 1.6, 1.8]; // "amplification" for vX/vY (based on flake size/type)
@ -365,24 +371,24 @@ class SnowStorm {
this.meltFrame = 0; this.meltFrame = 0;
this.twinkleFrame = 0; this.twinkleFrame = 0;
this.active = 1; this.active = 1;
this.fontSize = (10+(this.type/5)*10); this.fontSize = 10 + (this.type / 5) * 10;
this.o = document.createElement('div'); this.o = document.createElement("div");
this.o.innerHTML = storm.snowCharacter; this.o.innerHTML = storm.snowCharacter;
if (storm.className) { if (storm.className) {
this.o.setAttribute('class', storm.className); this.o.setAttribute("class", storm.className);
} }
this.o.style.color = storm.snowColor; this.o.style.color = storm.snowColor;
this.o.style.position = (fixedForEverything?'fixed':'absolute'); this.o.style.position = fixedForEverything ? "fixed" : "absolute";
if (storm.useGPU && features.transform.prop) { if (storm.useGPU && features.transform.prop) {
// GPU-accelerated snow. // GPU-accelerated snow.
this.o.style[features.transform.prop] = 'translate3d(0px, 0px, 0px)'; this.o.style[features.transform.prop] = "translate3d(0px, 0px, 0px)";
} }
this.o.style.width = storm.flakeWidth+'px'; this.o.style.width = storm.flakeWidth + "px";
this.o.style.height = storm.flakeHeight+'px'; this.o.style.height = storm.flakeHeight + "px";
this.o.style.fontFamily = 'arial,verdana'; this.o.style.fontFamily = "arial,verdana";
this.o.style.cursor = 'default'; this.o.style.cursor = "default";
this.o.style.overflow = 'hidden'; this.o.style.overflow = "hidden";
this.o.style.fontWeight = 'normal'; this.o.style.fontWeight = "normal";
this.o.style.zIndex = storm.zIndex; this.o.style.zIndex = storm.zIndex;
docFrag.appendChild(this.o); docFrag.appendChild(this.o);
@ -395,15 +401,19 @@ class SnowStorm {
}; };
this.stick = function () { this.stick = function () {
if (noFixed || (storm.targetElement !== document.documentElement && storm.targetElement !== document.body)) { if (
s.o.style.top = (screenY+scrollY-storm.flakeHeight)+'px'; noFixed ||
(storm.targetElement !== document.documentElement &&
storm.targetElement !== document.body)
) {
s.o.style.top = screenY + scrollY - storm.flakeHeight + "px";
} else if (storm.flakeBottom) { } else if (storm.flakeBottom) {
s.o.style.top = storm.flakeBottom+'px'; s.o.style.top = storm.flakeBottom + "px";
} else { } else {
s.o.style.display = 'none'; s.o.style.display = "none";
s.o.style.bottom = '0%'; s.o.style.bottom = "0%";
s.o.style.position = 'fixed'; s.o.style.position = "fixed";
s.o.style.display = 'block'; s.o.style.display = "block";
} }
}; };
@ -419,10 +429,12 @@ class SnowStorm {
}; };
this.move = function () { this.move = function () {
var vX = s.vX*windOffset, yDiff; var vX = s.vX * windOffset,
yDiff;
s.x += vX; s.x += vX;
s.y += (s.vY*s.vAmp); s.y += s.vY * s.vAmp;
if (s.x >= screenX || screenX-s.x < storm.flakeWidth) { // X-axis scroll check if (s.x >= screenX || screenX - s.x < storm.flakeWidth) {
// X-axis scroll check
s.x = 0; s.x = 0;
} else if (vX < 0 && s.x - storm.flakeLeftOffset < -storm.flakeWidth) { } else if (vX < 0 && s.x - storm.flakeLeftOffset < -storm.flakeWidth) {
s.x = screenX - storm.flakeWidth - 1; // flakeWidth; s.x = screenX - storm.flakeWidth - 1; // flakeWidth;
@ -437,7 +449,13 @@ class SnowStorm {
s.recycle(); s.recycle();
} }
} else { } else {
if (storm.useMeltEffect && s.active && s.type < 3 && !s.melting && Math.random()>0.998) { if (
storm.useMeltEffect &&
s.active &&
s.type < 3 &&
!s.melting &&
Math.random() > 0.998
) {
// ~1/1000 chance of melting mid-air, with each frame // ~1/1000 chance of melting mid-air, with each frame
s.melting = true; s.melting = true;
s.melt(); s.melt();
@ -452,9 +470,13 @@ class SnowStorm {
} else { } else {
s.twinkleFrame--; s.twinkleFrame--;
if (!opacitySupported) { if (!opacitySupported) {
s.o.style.visibility = (s.twinkleFrame && s.twinkleFrame % 2 === 0 ? 'hidden' : 'visible'); s.o.style.visibility =
s.twinkleFrame && s.twinkleFrame % 2 === 0
? "hidden"
: "visible";
} else { } else {
s.o.style.opacity = (s.twinkleFrame && s.twinkleFrame % 2 === 0 ? 0 : 1); s.o.style.opacity =
s.twinkleFrame && s.twinkleFrame % 2 === 0 ? 0 : 1;
} }
} }
} }
@ -485,8 +507,13 @@ class SnowStorm {
} else { } else {
if (s.meltFrame < s.meltFrameCount) { if (s.meltFrame < s.meltFrameCount) {
s.setOpacity(s.o, s.meltFrames[s.meltFrame]); s.setOpacity(s.o, s.meltFrames[s.meltFrame]);
s.o.style.fontSize = s.fontSize-(s.fontSize*(s.meltFrame/s.meltFrameCount))+'px'; s.o.style.fontSize =
s.o.style.lineHeight = storm.flakeHeight+2+(storm.flakeHeight*0.75*(s.meltFrame/s.meltFrameCount))+'px'; s.fontSize - s.fontSize * (s.meltFrame / s.meltFrameCount) + "px";
s.o.style.lineHeight =
storm.flakeHeight +
2 +
storm.flakeHeight * 0.75 * (s.meltFrame / s.meltFrameCount) +
"px";
s.meltFrame++; s.meltFrame++;
} else { } else {
s.recycle(); s.recycle();
@ -495,34 +522,36 @@ class SnowStorm {
}; };
this.recycle = function () { this.recycle = function () {
s.o.style.display = 'none'; s.o.style.display = "none";
s.o.style.position = (fixedForEverything?'fixed':'absolute'); s.o.style.position = fixedForEverything ? "fixed" : "absolute";
s.o.style.bottom = 'auto'; s.o.style.bottom = "auto";
s.setVelocities(); s.setVelocities();
s.vCheck(); s.vCheck();
s.meltFrame = 0; s.meltFrame = 0;
s.melting = false; s.melting = false;
s.setOpacity(s.o, 1); s.setOpacity(s.o, 1);
s.o.style.padding = '0px'; s.o.style.padding = "0px";
s.o.style.margin = '0px'; s.o.style.margin = "0px";
s.o.style.fontSize = s.fontSize+'px'; s.o.style.fontSize = s.fontSize + "px";
s.o.style.lineHeight = (storm.flakeHeight+2)+'px'; s.o.style.lineHeight = storm.flakeHeight + 2 + "px";
s.o.style.textAlign = 'center'; s.o.style.textAlign = "center";
s.o.style.verticalAlign = 'baseline'; s.o.style.verticalAlign = "baseline";
s.x = parseInt(rnd(screenX - storm.flakeWidth - 20), 10); s.x = parseInt(rnd(screenX - storm.flakeWidth - 20), 10);
s.y = parseInt(rnd(screenY) * -1, 10) - storm.flakeHeight; s.y = parseInt(rnd(screenY) * -1, 10) - storm.flakeHeight;
s.refresh(); s.refresh();
s.o.style.display = 'block'; s.o.style.display = "block";
s.active = 1; s.active = 1;
}; };
this.recycle(); // set up x/y coords etc. this.recycle(); // set up x/y coords etc.
this.refresh(); this.refresh();
}; };
this.snow = function () { this.snow = function () {
var active = 0, flake = null, i, j; var active = 0,
flake = null,
i,
j;
for (i = 0, j = storm.flakes.length; i < j; i++) { for (i = 0, j = storm.flakes.length; i < j; i++) {
if (storm.flakes[i].active === 1) { if (storm.flakes[i].active === 1) {
storm.flakes[i].move(); storm.flakes[i].move();
@ -549,7 +578,7 @@ class SnowStorm {
} }
var x = parseInt(e.clientX, 10); var x = parseInt(e.clientX, 10);
if (x < screenX2) { if (x < screenX2) {
windOffset = -windMultiplier+(x/screenX2*windMultiplier); windOffset = -windMultiplier + (x / screenX2) * windMultiplier;
} else { } else {
x -= screenX2; x -= screenX2;
windOffset = (x / screenX2) * windMultiplier; windOffset = (x / screenX2) * windMultiplier;
@ -559,7 +588,9 @@ class SnowStorm {
this.createSnow = function (limit, allowInactive) { this.createSnow = function (limit, allowInactive) {
var i; var i;
for (i = 0; i < limit; i++) { for (i = 0; i < limit; i++) {
storm.flakes[storm.flakes.length] = new storm.SnowFlake(parseInt(rnd(flakeTypes),10)); storm.flakes[storm.flakes.length] = new storm.SnowFlake(
parseInt(rnd(flakeTypes), 10)
);
if (allowInactive || i > storm.flakesMaxActive) { if (allowInactive || i > storm.flakesMaxActive) {
storm.flakes[storm.flakes.length - 1].active = -1; storm.flakes[storm.flakes.length - 1].active = -1;
} }
@ -575,25 +606,29 @@ class SnowStorm {
this.init = function () { this.init = function () {
var i; var i;
for (i = 0; i < storm.meltFrameCount; i++) { for (i = 0; i < storm.meltFrameCount; i++) {
storm.meltFrames.push(1-(i/storm.meltFrameCount)); storm.meltFrames.push(1 - i / storm.meltFrameCount);
} }
storm.randomizeWind(); storm.randomizeWind();
storm.createSnow(storm.flakesMax); // create initial batch storm.createSnow(storm.flakesMax); // create initial batch
storm.events.add(window,'resize',storm.resizeHandler); storm.events.add(window, "resize", storm.resizeHandler);
storm.events.add(window,'scroll',storm.scrollHandler); storm.events.add(window, "scroll", storm.scrollHandler);
if (storm.freezeOnBlur) { if (storm.freezeOnBlur) {
if (isIE) { if (isIE) {
storm.events.add(document,'focusout',storm.freeze); storm.events.add(document, "focusout", storm.freeze);
storm.events.add(document,'focusin',storm.resume); storm.events.add(document, "focusin", storm.resume);
} else { } else {
storm.events.add(window,'blur',storm.freeze); storm.events.add(window, "blur", storm.freeze);
storm.events.add(window,'focus',storm.resume); storm.events.add(window, "focus", storm.resume);
} }
} }
storm.resizeHandler(); storm.resizeHandler();
storm.scrollHandler(); storm.scrollHandler();
if (storm.followMouse) { if (storm.followMouse) {
storm.events.add(isIE?document:window,'mousemove',storm.mouseMove); storm.events.add(
isIE ? document : window,
"mousemove",
storm.mouseMove
);
} }
storm.animationInterval = Math.max(20, storm.animationInterval); storm.animationInterval = Math.max(20, storm.animationInterval);
storm.timerInit(); storm.timerInit();
@ -606,28 +641,37 @@ class SnowStorm {
// already loaded and running // already loaded and running
return true; return true;
} }
if (typeof storm.targetElement === 'string') { if (typeof storm.targetElement === "string") {
var targetID = storm.targetElement; var targetID = storm.targetElement;
storm.targetElement = document.getElementById(targetID); storm.targetElement = document.getElementById(targetID);
if (!storm.targetElement) { if (!storm.targetElement) {
throw new Error('Snowstorm: Unable to get targetElement "'+targetID+'"'); throw new Error(
'Snowstorm: Unable to get targetElement "' + targetID + '"'
);
} }
} }
if (!storm.targetElement) { if (!storm.targetElement) {
storm.targetElement = (document.body || document.documentElement); storm.targetElement = document.body || document.documentElement;
} }
if (storm.targetElement !== document.documentElement && storm.targetElement !== document.body) { if (
storm.targetElement !== document.documentElement &&
storm.targetElement !== document.body
) {
// re-map handler to get element instead of screen dimensions // re-map handler to get element instead of screen dimensions
storm.resizeHandler = storm.resizeHandlerAlt; storm.resizeHandler = storm.resizeHandlerAlt;
//and force-enable pixel positioning //and force-enable pixel positioning
storm.usePixelPosition = true; storm.usePixelPosition = true;
} }
storm.resizeHandler(); // get bounding box elements storm.resizeHandler(); // get bounding box elements
storm.usePositionFixed = (storm.usePositionFixed && !noFixed && !storm.flakeBottom); // whether or not position:fixed is to be used storm.usePositionFixed =
storm.usePositionFixed && !noFixed && !storm.flakeBottom; // whether or not position:fixed is to be used
if (window.getComputedStyle) { if (window.getComputedStyle) {
// attempt to determine if body or user-specified snow parent element is relatlively-positioned. // attempt to determine if body or user-specified snow parent element is relatlively-positioned.
try { try {
targetElementIsRelative = (window.getComputedStyle(storm.targetElement, null).getPropertyValue('position') === 'relative'); targetElementIsRelative =
window
.getComputedStyle(storm.targetElement, null)
.getPropertyValue("position") === "relative";
} catch (e) { } catch (e) {
// oh well // oh well
targetElementIsRelative = false; targetElementIsRelative = false;
@ -645,7 +689,11 @@ class SnowStorm {
storm.start(true); storm.start(true);
}, 20); }, 20);
// event cleanup // event cleanup
storm.events.remove(isIE?document:window,'mousemove',doDelayedStart); storm.events.remove(
isIE ? document : window,
"mousemove",
doDelayedStart
);
} }
function doStart() { function doStart() {
@ -653,16 +701,19 @@ class SnowStorm {
doDelayedStart(); doDelayedStart();
} }
// event cleanup // event cleanup
storm.events.remove(window, 'load', doStart); storm.events.remove(window, "load", doStart);
} }
// hooks for starting the snow // hooks for starting the snow
if (storm.autoStart) { if (storm.autoStart) {
storm.events.add(window, 'load', doStart, false); storm.events.add(window, "load", doStart, false);
} }
return this; return this;
} }
} }
const snow_container = document.querySelector(".snow-container");
if (snow_container) {
new SnowStorm(); new SnowStorm();
}