Implementing shutter animation effects based on JavaScript is not only possible with simple flas_javascript skills

When I saw this kind of shutter animation, I thought it was all implemented in flash. Recently, I suddenly had an idea and thought of using js to implement it (although I am not a front-end person, I am a .net person). Although the code has been implemented, it is quite messy. Let’s take a picture first:

A js animation, I used to think that only flash could achieve it

The code is mainly some mathematical calculations, and then combined with html and css to create a flash-like effect.

The main part of the code is posted below:

function all(books){
for(var i=;i<self.rows;i++) {
for (var j = ; j < self.columns; j++) {
if(!books[i][j])return false;
}
}
return true;
}
function resetBooks(books){
for(var i=;i<self.rows;i++) {
for (var j = ; j < self.columns; j++) {
books[i][j]=false;
}
}
return true;
}
var self=this,timer=null,_iindex= ;
var initdir=[[[,],[,]],[[-,],[,]],[[,-],[-,]],[[,-],[,]],[[,-],[,],[,],[-,]]],dir=initdir[];
var weight=[,,,,];
var initpos=[[{x:,y:-}],[{x:self.columns-,y:-}],[{x:self.columns-,y:self.rows}],[{x:,y:self.rows}],[{x:self.columns/,y:self.rows/}]];
timer=setInterval(function(){
var n=[];
for(var i=;i<self.preDivs.length;i++){
var _div=null,x= ,y=;
for(var j=;j<dir.length;j++){
x=self.preDivs[i].x+dir[j][];
y=self.preDivs[i].y+dir[j][];
if(x>=&&y>=&&x<self.columns&&y<self.rows&&!self.books[y][x]){
self.books[y][x]=true;
_div=self.zzDivStatck[y][x];
n.push({x:x,y:y});
_div.style.backgroundImage = "url(" + self.zzImages[_iindex] + ")";
_div.style.backgroundPositionX = (-x * self.zzDivW) + "px ";
_div.style.backgroundPositionY = (-y * self.zzDivH) + "px";
}
}
}
self.preDivs=n;
if(all(self.books)){
resetBooks(self.books);
var _r=util.randomWeight(weight);
self.preDivs = initpos[_r];
dir=initdir[_r];
_iindex++;
}
if(_iindex>=+self.zzImages.length){
_iindex=;
}
},);

The above code is a blind animation effect implemented using javascript. I hope it will be helpful to everyone!