An effect style plug-in for image and video buffering created based on jquery_jquery

Copy code The code is as follows:

(function($) {
$.fn.scrollWait = function(options) {
var ops = $.extend({}, $.fn.scrollWait.defaults, options);
var opts = $.meta ? $.extend({}, ops, $( this).data()) : ops;
/**
* Show location
*/
var win = $(window);
var winheight = win.height();
var winwidth = win.width();
var dsize = opts.size;
var top = opts.top;
var left = opts.left;
var dtop = !top && top != "" && typeof top != "undefined" && top != 0
? (winheight - dsize) / 2
: top;
var dleft = !left && left != "" && typeof left != " undefined"
&& left != 0 ? (winwidth - dsize) / 2 : left;
// Number of origins
var num = opts.num;
// Diameter of origin
var R = dsize / num * opts.areaWeight;
// Radius
var r = 1 / 2 * R;
// Outer circle diameter
var outerR = 1 / 2 * dsize;
//Inner circle diameter
var innerR = outerR - R;
//Traverse and add origin object
for (var i = 0; i < num; i ) {
$('body' ).append($("

i "">

"));
}
// The actual coordinate is 0, 0
var i = 0;
var innerArray = new Array(num);
/**
* Calculate the center coordinates of the point on the inner circle
*/
for (var j = 0; j < innerArray.length; j ) {
var x, y;
var ang = i * 360 / num;
if (0 <= ang && ang <= 90) {
x = outerR * Math.sin (ang / 180 * Math.PI) outerR;
y = outerR - outerR * Math.cos(ang / 180 * Math.PI);
}
if (90 < ang && ang < = 180) {
x = outerR * Math.cos((ang - 90) / 180 * Math.PI) outerR;
y = outerR * Math.sin((ang - 90) / 180 * Math. PI) outerR;
}
if (180 < ang && ang <= 270) {
x = outerR - outerR * Math.sin((ang - 180) / 180 * Math.PI) ;
y = outerR * Math.cos((ang - 180) / 180 * Math.PI) outerR;
}
if (270 < ang && ang <= 360) {
x = outerR - outerR * Math.cos((ang - 270) / 180 * Math.PI);
y = outerR - outerR * Math.sin((ang - 270) / 180 * Math.PI);
}
innerArray[j] = new Array(dtop y - r, dleft x - r);
i ;
}
/**
* Draw a circle
*/
$( ".innerCircle").each(function() {
$(this).css({
'width' : R "px",
'height' : R "px",
'border-top-left-radius' : r "px",
'border-top-right-radius' : r "px",
'border-bottom-left-radius' : r "px" ,
'border-bottom-right-radius' : r "px"
});
});
for (var i = 0; i < num; i ) {
$("#innerCircle" i).css({
'top' : innerArray[i][0] "px",
'left' : innerArray[i][1] "px"
});
}
// Find the position of the currently paused circle
var val = $("#current").val();
if (val == undefined || val == "") {
$("body").append($(""));
k = 0;
} else {
k = val;
}
var o = new Object();
var timer;
// Start rotating
o.start = function() {
var first;
var g = $("#grade").val();
if (g == undefined || g == "") {
$("body") .append($(""));
first = 1;
} else {
first = g;
}
timer = setInterval(function() {
if (first % 2 == 1) {
$("#innerCircle" k).removeClass("innerCircle")
.addClass("innerCircle- change");
}
if (first % 2 == 0) {
$("#innerCircle" k).removeClass("innerCircle-change")
.addClass("innerCircle" );
}
if (k == (num - 1)) {
k = 0;
console.log(first);
first ;
$("# grade").val(first);
} else {
k ;
}
// Overwrite value
$("#current").val(k);
}, opts.speed);
return this;
}
// Pause
o.stop = function() {
clearInterval(timer);
return this;
}
// End
o.end = function() {
clearInterval(timer);
// Remove all elements
$(".innerCircle,.innerCircle-change, #current,#grade").remove();
}
return o;
}
$.fn.scrollWait.defaults = {
size : 80,
top : null,
left : null,
// Quantity
num: 8,
speed: 200,
// Proportion of dots to the entire area
areaWeight: 5 / 4
};
})(jQuery);

Call method:

Copy codeThe code is as follows:

<머리>




href="scroll-wait-jquery-plugin.css">




<본문>

css:

复代码 代码如下:

. innerCircle {
위치: 절대;
배경: #FFFF00;
불투명도: 0.8;
}
.innerCircle-change {
배경: #333;
위치: 절대;
}