jQuery Custom [:] Expression

 

core jQuery.expr[:] expresssions

animated=function(a){return jQuery.grep(jQuery.timers,function(fn){return a==fn.elem;}).length;}

button=function(a){return "button"==a.type||jQuery.nodeName(a,"button");}

checkbox=function(a){return "checkbox"==a.type;}

 

checked=function(a){return a.checked;}

contains=function(a,i,m){return (a.textContent||a.innerText||jQuery(a).text()||"").indexOf(m[3])>=0;}

disabled=function(a){return a.disabled;}

empty=function(a){return !a.firstChild;}

enabled=function(a){return !a.disabled;}

eq=function(a,i,m){return m[3]-0==i;}

even=function(a,i){return i%2==0;}

file=function(a){return "file"==a.type;}

first-child=function(a){return a.parentNode.getElementsByTagName("*")[0]==a;}

first=function(a,i){return i==0;}

gt=function(a,i,m){return i>m[3]-0;}

has=function(a,i,m){return jQuery.find(m[3],a).length;}

header=function(a){return /h/d/i.test(a.nodeName);}

hidden=function(a){return "hidden"==a.type||jQuery.css(a,"display")=="none"||jQuery.css(a,"visibility")=="hidden";}

image=function(a){return "image"==a.type;}

input=function(a){return /input|select|textarea|button/i.test(a.nodeName);}

last-child=function(a){return jQuery.nth(a.parentNode.lastChild,1,"previousSibling")==a;}

last=function(a,i,m,r){return i==r.length-1;}

lt=function(a,i,m){return inth=function(a,i,m){return m[3]-0==i;}

odd=function(a,i){return i%2;}

only-child=function(a){return !jQuery.nth(a.parentNode.lastChild,2,"previousSibling");}

parent=function(a){return a.firstChild;}

password=function(a){return "password"==a.type;}

radio=function(a){return "radio"==a.type;}

reset=function(a){return "reset"==a.type;}

selected=function(a){return a.selected||jQuery.attr(a,"selected");}

submit=function(a){return "submit"==a.type;}

text=function(a){return "text"==a.type;}

visible=function(a){return "hidden"!=a.type&&jQuery.css(a,"display")!="none"&&jQuery.css(a,"visibility")!="hidden";}

sample custom expresssions added to jQuery.expr[':']

nothidden=function(a) { return a.type&&a.type!='hidden'; } submitable=function(a) { return !a.disabled&&(a.selected||a.checked||(a.nodeName.toUpperCase()=='TEXTAREA')||(a.nodeName.toUpperCase()=='INPUT'&&(a.type=='text'||a.type=='hidden'||a.type=='password'))); }

 

the code

 // Add this code anywhere you want (after jQuery has been loaded). // Edit it to add your own expressions. jQuery.extend(jQuery.expr[':'], { /////////////////////////////////////////////////////////// // form elements that are submitable based on these criteria // element is not disabled // element has a selected or checked attribute // element is a textarea // element is an input of type text or hidden // // @usage: $(':submitable') // @usage: $('#myForm :submitable') submitable: function(a) { return !a.disabled&&(a.selected||a.checked||(a.nodeName.toUpperCase() =='TEXTAREA')||(a.nodeName.toUpperCase()=='INPUT'&&(a.type=='text'||a.type=='hidden'||a.type=='password'))); }, /////////////////////////////////////////////////////////// // elements that have a type attribute not equal to hidden // use if you want to select all input elements that are not hidden // @usage: $('input:nothidden') nothidden: function(a) { return a.type&&a.type!='hidden'; } })