URLで条件分岐

コード

if(location.pathname =='/a.php'){
}

//複数
if((location.pathname =='/a.php')||(location.pathname =='/b.php')){
}

//使用例
if((location.pathname =='/a.php')||(location.pathname =='/b.php')){
  if (document.readyState === 'loading') {  // Loading hasn't finished yet
    document.addEventListener('DOMContentLoaded', userFunc);
  } else {  // `DOMContentLoaded` has already fired
    userFunc();
  }
}