by noromanba
2017-01-06 [2017/01/06 08:56:18]
scroll into next headings (h1-6)
/*
* @title ↓Headings
* @description scroll into next headings (h1-6)
* @include http://*
* @include https://*
* @contributor yuggrdrasill http://let.hatelabo.jp/yuggrdrasill/let/gYC-xqSB3eS6NA (Fork of)
* @license MIT License https://opensource.org/licenses/MIT
* @javascript_url
*/
// TBD
// - omit jQuery
// - replace to ES6+/ES2015+
(function() {
'use strict';
var currentPosition = function() {
return document.documentElement.scrollTop || document.body.scrollTop;
};
var move = function() {
var jQuery = window.jQuery;
jQuery(':header').each(function() {
var offsetTop = Math.floor(jQuery(this).offset().top);
if (offsetTop > currentPosition()) {
jQuery('html, body').animate({
scrollTop: offsetTop
}, 100);
return false;
}
});
};
if (window.jQuery) {
move();
} else {
var script = document.createElement('script');
// must be needs versioned URL c.f.
// https://blog.jquery.com/2014/07/03/dont-use-jquery-latest-js/
// XXX always 1.11.1
// https://code.jquery.com/jquery.min.js
// jQuery 1.x latest stable: 1.12.4
script.src = 'https://code.jquery.com/jquery-git.min.js';
//script.src = 'https://code.jquery.com/jquery-3.1.1.min.js';
//script.src = 'https://code.jquery.com/jquery-3.1.1.slim.min.js';
//script.src = 'https://code.jquery.com/jquery-1.x-git.min.js';
script.addEventListener('load', function() {
move();
});
var wall = document.head || document.body || document.documentElement;
wall.appendChild(script);
}
})();