Jquery modifies the property value instance code of of to set the property value

Set properties - attr ()

The jQuery attr() method is also used to set/change property values.

The following example shows how to change the value of the href attribute in the link:

The instance

$("button").click(function(){
$("#keleyi").attr("href","//www.jb51.net");
});

The attr() method also allows you to set multiple properties simultaneously.
The following example shows how to set both the href and title attributes:

The instance

$("button").click(function(){
$("#keleyi").attr({
"href" : "//www.jb51.net",
"title" : " KeLeYi net "
});
});

The callback function for attr()

The following example demonstrates an attr() method with a callback function:

The instance

$("button").click(function(){
$("#keleyi").attr("href", function(i,origValue){
return origValue + "/jquery";
});
});