In jquery, EQ sets the radio value instance

Definitions and usage

: the EQ () selector selects the element with the specified index value.

The index value starts at 0, and the index value of all the first elements is 0 (not 1).

Often used with other elements/selectors to select elements of a specific ordinal in a specified group, such as the example above.

The code is as follows	Copy Code
<p> <label for= "" > Sex:</label> <span> <em> male </em> <input type= "Radio" name= "Sex" value= "male"/> </span> <span> <em> Women </em> <input type= "Radio" name= "Sex" value= "female"/> </span> </p>

JQuery set the radio value when you see someone using the Nth method

? using nth

The code is as follows	Copy Code
$ (' input:radio[name=sex]:nth (0) '). attr (' checked ', true);

In fact, Nth and EQ are the same, and can be replaced with EQ completely.

The code is as follows	Copy Code
var sex= ' female '; if (sex== ' man ') { $ ("Input:radio[name= ' Sex ']:eq (0)"). attr (' checked ', true); }else{ $ ("Input:radio[name= ' Sex ']:eq (1)"). attr (' checked ', true); }

JQuery source can be seen Nth has not recommended use, will also be converted into EQ

code is as follows	copy code
//deprecated expr.pseudos["nth"] = expr.pseudos["eq"];