Jquery form object attribute filtering selector usage

Jquery form object attribute filtering selector usage

This document describes how to filter selector attributes of jquery form objects. Share it with you for your reference. The specific analysis is as follows:

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<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd> <Html xmlns = "http://www.w3.org/1999/xhtml"> <Head> <Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/> <Title> form object attribute filter selector </title> <Script src = "jquery-1.6.2.min.js" type = "text/javascript"> </script> <Script type = "text/javascript"> $ (Function (){ // =========== Example 1 ===================================== //: Enabled usage: $ ("input: enabled") returned value set Element // Description: match all available elements. It means to find all input without disabled = "disabled". It is not disabled, // Of course it is enabled. $ ("Input: enabled"). val ("I Am a valid button "); // =========== Example 2 ===================================== //: Disabled usage: $ ("input: disabled") return value set Element // Description: matches all the unavailable elements. It corresponds to the one above. $ ("Input: disabled"). val ("I am an invalid button "); // =========== Example 3 ===================================== //: Checked usage: $ ("input: checked") return value set Element // Description: match all selected elements (check box, single-choice, and so on, excluding option in select. //... <1> extract the check boxes of all selected names = 'love' $ ("# BtnTest"). click (function (){ ShowElements ($ ("input [name = 'love']: checked"); // method 1 // ShowElements ($ ("[name = 'love']: checked") // method 2 }); // =========== Example 4 ===================================== //: Selected usage: $ ("select option: selected") return value set Element // Description: matches all selected option elements. //... <1> all names = 'city' are selected from the drop-down list. $ ("# BtnTest2"). click (function (){ ShowElements ($ ("select [name = 'city'] option: selected ")); }); //... <2> all names = 'prov' are selected in the drop-down list. // $ ("# BtnTest2"). click (function (){ // ShowElements ($ ("select [name = 'prov'] option: selected ")); //}); }); Function ShowElements (arr ){ // Alert (arr. length ); Var output = ""; For (var I = 0; I <arr. length; I ++ ){ If (output = ""){ Output = arr. eq (I). val (); } Else { Output + = "," + arr. eq (I). val (); } } Alert (output ); } </Script> </Head> <Body> <Input type = "button" disabled = "disabled" value = "button1"/> <Input type = "button" value = "button2"/> <Input type = "button" value = "button3"/> <Input type = "button" disabled = "disabled" value = "button4"/> <Input type = "button" id = "btnTest" value = "click the check box"/> <Input type = "checkbox" name = "love" value = "1"/> football <Input type = "checkbox" name = "love" value = "2"/> basketball <Input type = "checkbox" name = "love" value = "3"/> volleyball <Input type = "checkbox" name = "Other" value = "3"/> non-Hobby <br/> I am a drop-down box <input type = "button" id = "btnTest2" value = "click I check the drop-down box"/> <Select name = "city"> <Option value = 'beijing'> beijing </option> <Option value = 'shanghai'> shanghai </option> <Option value = 'shenzhen '> shenzhen </option> </Select> <Select name = "prov"> <Option value = 'jiangxi '> jiangxi </option> <Option value = 'shichuanc'> Sichuan </option> <Option value = 'guangdong'> guangdong </option> </Select> </Body> </Html>

I hope this article will help you with jQuery programming.