return has a double equal sign. How to understand this?
function init(){
var url = window.location.pathname.split( "/" );
if(url.length > 0) url = url[url.length - 1];
$("-sharpaside .active").removeClass("active");
$("-sharpaside a").filter( function() {
return url == $(this).attr("href");
}).parents("li").addClass( "active" );
}return url == $(this).attr("href"); //my own understanding is that if the two sides are equal, return true? Is that right? no.
if(url == $(this).attr('href'))
{
return true;
}
else
{
return false;
}the return value of the equality expression true/false
calculates the value of the expression first, and then return calculates the value.
if so, does not make an error, return returns a Boolean value
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