```
$("#chaomao").corner("5px")
```
它就实现了id值问哦chaomao的元素，5px的圆角
jQuery圆角插件
jQuery.js内容
```
/*!
/**
*/
;(function() {
var style = document.createElement(‘div’).style,
moz = style[‘MozBorderRadius’] !== undefined,
webkit = style[‘WebkitBorderRadius’] !== undefined,
radius = style[‘borderRadius’] !== undefined || style[‘BorderRadius’] !== undefined,
mode = document.documentMode || 0,
noBottomFold = .browser.msie && ((.browser.version < 8 && !mode) || mode < 8),
expr = <span class="katex math inline">.browser.msie && (function() {
var div = document.createElement('div');
try { div.style.setExpression('width','0+0'); div.style.removeExpression('width'); }
catch(e) { return false; }
return true;
})();</span>.support = <span class="katex math inline">.support || {};</span>.support.borderRadius = moz || webkit || radius; // so you can do: if (!<span class="katex math inline">.support.borderRadius)</span>('#myDiv').corner();
function sz(el, p) {
return parseInt(.css(el,p))||0;
};
function hex2(s) {
s = parseInt(s).toString(16);
return ( s.length<2 ) ? ‘0’+s : s;
};
function gpc(node) {
while(node) {
var v =.css(node,‘backgroundColor’), rgb;
if (v && v != ’transparent’ && v != ‘rgba(0, 0, 0, 0)’) {
if (v.indexOf(‘rgb’) >= 0) {
rgb = v.match(/\d+/g);
return ‘#’+ hex2(rgb[0]) + hex2(rgb[1]) + hex2(rgb[2]);
}
return v;
}
if (node.nodeName.toLowerCase() == ‘html’)
break;
node = node.parentNode; // keep walking if transparent
}
return ‘#ffffff’;
};
function getWidth(fx, i, width) {
switch(fx) {
case ‘round’: return Math.round(width*(1-Math.cos(Math.asin(i/width))));
case ‘cool’: return Math.round(width*(1+Math.cos(Math.asin(i/width))));
case ‘sharp’: return width-i;
case ‘bite’: return Math.round(width*(Math.cos(Math.asin((width-i-1)/width))));
case ‘slide’: return Math.round(width*(Math.atan2(i,width/i)));
case ‘jut’: return Math.round(width*(Math.atan2(width,(width-i-1))));
case ‘curl’: return Math.round(width*(Math.atan(i)));
case ’tear’: return Math.round(width*(Math.cos(i)));
case ‘wicked’: return Math.round(width*(Math.tan(i)));
case ’long’: return Math.round(width*(Math.sqrt(i)));
case ‘sculpt’: return Math.round(width*(Math.log((width-i-1),width)));
case ‘dogfold’:
case ‘dog’: return (i&1) ? (i+1) : width;
case ‘dog2’: return (i&2) ? (i+1) : width;
case ‘dog3’: return (i&3) ? (i+1) : width;
case ‘fray’: return (i%2)*width;
case ’notch’: return width;
case ‘bevelfold’:
case ‘bevel’: return i+1;
case ‘steep’: return i/2 + 1;
case ‘invsteep’:return (width-i)/2+1;
}
};
.fn.corner = function(options) {
// in 1.3+ we can fix mistakes with the ready state
if (this.length == 0) {
if (!.isReady && this.selector) {
var s = this.selector, c = this.context;
(function() {(s,c).corner(options);
});
}
return this;
}
return this.each(function(index){
var <span class="katex math inline">this =</span>(this),
// meta values override options
o = [<span class="katex math inline">this.attr(</span>.fn.corner.defaults.metaAttr) || '', options || ''].join(' ').toLowerCase(),
keep = /keep/.test(o), // keep borders?
cc = ((o.match(/cc:(#[0-9a-f]+)/)||[])[1]), // corner color
sc = ((o.match(/sc:(#[0-9a-f]+)/)||[])[1]), // strip color
width = parseInt((o.match(/(\d+)px/)||[])[1]) || 10, // corner width
re = /round|bevelfold|bevel|notch|bite|cool|sharp|slide|jut|curl|tear|fray|wicked|sculpt|long|dog3|dog2|dogfold|dog|invsteep|steep/,
fx = ((o.match(re)||['round'])[0]),
fold = /dogfold|bevelfold/.test(o),
edges = { T:0, B:1 },
opts = {
TL: /top|tl|left/.test(o), TR: /top|tr|right/.test(o),
BL: /bottom|bl|left/.test(o), BR: /bottom|br|right/.test(o)
},
// vars used in func later
strip, pad, cssHeight, j, bot, d, ds, bw, i, w, e, c, common, <span class="katex math inline">horz;
if ( !opts.TL && !opts.TR && !opts.BL && !opts.BR )
opts = { TL:1, TR:1, BL:1, BR:1 };
// support native rounding
if (</span>.fn.corner.defaults.useNative && fx == 'round' && (radius || moz || webkit) && !cc && !sc) {
if (opts.TL)
<span class="katex math inline">this.css(radius ? 'border-top-left-radius' : moz ? '-moz-border-radius-topleft' : '-webkit-border-top-left-radius', width + 'px');
if (opts.TR)</span>this.css(radius ? 'border-top-right-radius' : moz ? '-moz-border-radius-topright' : '-webkit-border-top-right-radius', width + 'px');
if (opts.BL)
<span class="katex math inline">this.css(radius ? 'border-bottom-left-radius' : moz ? '-moz-border-radius-bottomleft' : '-webkit-border-bottom-left-radius', width + 'px');
if (opts.BR)</span>this.css(radius ? 'border-bottom-right-radius' : moz ? '-moz-border-radius-bottomright' : '-webkit-border-bottom-right-radius', width + 'px');
return;
}
strip = document.createElement('div');
<span class="katex math inline">(strip).css({
overflow: 'hidden',
height: '1px',
minHeight: '1px',
fontSize: '1px',
backgroundColor: sc || 'transparent',
borderStyle: 'solid'
});
pad = {
T: parseInt(</span>.css(this,'paddingTop'))||0, R: parseInt(<span class="katex math inline">.css(this,'paddingRight'))||0,
B: parseInt(</span>.css(this,'paddingBottom'))||0, L: parseInt(<span class="katex math inline">.css(this,'paddingLeft'))||0
};
if (typeof this.style.zoom != undefined) this.style.zoom = 1; // force 'hasLayout' in IE
if (!keep) this.style.border = 'none';
strip.style.borderColor = cc || gpc(this.parentNode);
cssHeight =</span>(this).outerHeight();
for (j in edges) {
bot = edges[j];
// only add stips if needed
if ((bot && (opts.BL || opts.BR)) || (!bot && (opts.TL || opts.TR))) {
strip.style.borderStyle = 'none '+(opts[j+'R']?'solid':'none')+' none '+(opts[j+'L']?'solid':'none');
d = document.createElement('div');
<span class="katex math inline">(d).addClass('jquery-corner');
ds = d.style;
bot ? this.appendChild(d) : this.insertBefore(d, this.firstChild);
if (bot && cssHeight != 'auto') {
if (</span>.css(this,'position') == 'static')
this.style.position = 'relative';
ds.position = 'absolute';
ds.bottom = ds.left = ds.padding = ds.margin = '0';
if (expr)
ds.setExpression('width', 'this.parentNode.offsetWidth');
else
ds.width = '100%';
}
else if (!bot && <span class="katex math inline">.browser.msie) {
if (</span>.css(this,'position') == 'static')
this.style.position = 'relative';
ds.position = 'absolute';
ds.top = ds.left = ds.right = ds.padding = ds.margin = '0';
// fix ie6 problem when blocked element has a border width
if (expr) {
bw = sz(this,'borderLeftWidth') + sz(this,'borderRightWidth');
ds.setExpression('width', 'this.parentNode.offsetWidth - '+bw+'+ "px"');
}
else
ds.width = '100%';
}
else {
ds.position = 'relative';
ds.margin = !bot ? '-'+pad.T+'px -'+pad.R+'px '+(pad.T-width)+'px -'+pad.L+'px' :
(pad.B-width)+'px -'+pad.R+'px -'+pad.B+'px -'+pad.L+'px';
}
for (i=0; i < width; i++) {
w = Math.max(0,getWidth(fx,i, width));
e = strip.cloneNode(false);
e.style.borderWidth = '0 '+(opts[j+'R']?w:0)+'px 0 '+(opts[j+'L']?w:0)+'px';
bot ? d.appendChild(e) : d.insertBefore(e, d.firstChild);
}
if (fold && <span class="katex math inline">.support.boxModel) {
if (bot && noBottomFold) continue;
for (c in opts) {
if (!opts[c]) continue;
if (bot && (c == 'TL' || c == 'TR')) continue;
if (!bot && (c == 'BL' || c == 'BR')) continue;
common = { position: 'absolute', border: 'none', margin: 0, padding: 0, overflow: 'hidden', backgroundColor: strip.style.borderColor };</span>horz = <span class="katex math inline">('<div/>').css(common).css({ width: width + 'px', height: '1px' });
switch(c) {
case 'TL':</span>horz.css({ bottom: 0, left: 0 }); break;
case 'TR': <span class="katex math inline">horz.css({ bottom: 0, right: 0 }); break;
case 'BL':</span>horz.css({ top: 0, left: 0 }); break;
case 'BR': <span class="katex math inline">horz.css({ top: 0, right: 0 }); break;
}
d.appendChild(</span>horz[0]);
var <span class="katex math inline">vert =</span>('<div/>').css(common).css({ top: 0, bottom: 0, width: '1px', height: width + 'px' });
switch(c) {
case 'TL': <span class="katex math inline">vert.css({ left: width }); break;
case 'TR':</span>vert.css({ right: width }); break;
case 'BL': <span class="katex math inline">vert.css({ left: width }); break;
case 'BR':</span>vert.css({ right: width }); break;
}
d.appendChild(<span class="katex math inline">vert[0]);
}
}
}
}
});
};.fn.uncorner = function() {
if (radius || moz || webkit)
this.css(radius ? ‘border-radius’ : moz ? ‘-moz-border-radius’ : ‘-webkit-border-radius’, 0);
(‘div.jquery-corner’, this).remove();
return this;
};
// expose options.fn.corner.defaults = {
useNative: true, // true if plugin should attempt to use native browser support for border radius rounding
metaAttr: ‘data-corner’ // name of meta attribute to use for options
};
})(jQuery);
效果图
💬 评论