smoothscroll.js

checkdata.js

			function checkData(anchor){

				var checked = false;

				for (var k = 0; k < options.noData.length; k++) {
					if(anchor.hasAttribute(options.noData[k])){

						checked = true;
						return checked;
					}

				}

				return checked;

			}

function.js

			if(e.target.localName!=='a'){
				//hrefがなかったらある親まで遡る
				var parent = e.target.parentNode;
				while(parent.localName!=='a'){
					parent = parent.parentNode;
				}
				targetURL    = parent.href;
				targetAnchor = parent;
			}


			if(targetAnchor.hasAttribute('target')){
				return;
			}

			e.preventDefault();

			if(checkClass(targetAnchor.className)||checkData(targetAnchor)){
				return;
			}


			if(thisURL.split('#')[0] === targetURL.split('#')[0] && e.target.hash){

				smoothScroll(e.target.hash);

			}else{


				location.href=targetURL;

			}

smoothscroll.js

//t=now-date
//b=最初の値
//c=最後の値
//d=何秒

Math.ease =  function (t, b, c, d) {
	t /= d/2;
	if (t < 1) return c/2*t*t*t + b;
	t -= 2;
	return c/2*(t*t*t + 2) + b;
};

function smoothScroll(hash){
	
	var settings = {
		duration  :1500,
		breakpoint:992,
		plus      :70
	};

	var date = new Date(),
		pos = document.documentElement.scrollTop || document.body.scrollTop,
		end = document.getElementById(hash.split('#')[1]).offsetTop,
		_time,
		
	if(settings.breakpoint < window.innerWidth){

		settings.plus = 0;
	}

	end -= settings.plus;

	function time(){

		var now = new Date();

		if(now-date<settings.duration){

			_time = setTimeout(function(){
				var scroll = Math.ease(now-date,pos,end-pos,settings.duration);
				
				window.scrollTo(0,parseInt(scroll,10));

				time();
			},0);

		}else{
			clearTimeout(_time);
		}


	}

	time();

}