참고소스 수정본
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@@ -0,0 +1,53 @@
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;(function () {
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'use strict'
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var article = document.querySelector('article.doc')
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var cheatSheet = document.querySelector('body.cheat-sheet')
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var toolbar = document.querySelector('.toolbar')
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var headerNavigationBar = document.querySelector('header > .navbar')
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function decodeFragment (hash) {
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return hash && (~hash.indexOf('%') ? decodeURIComponent(hash) : hash).slice(1)
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}
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function computePosition (el, sum) {
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if (article.contains(el)) {
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return computePosition(el.offsetParent, el.offsetTop + sum)
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} else {
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return sum
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}
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}
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function jumpToAnchor (e) {
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if (e) {
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window.location.hash = '#' + this.id
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e.preventDefault()
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}
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var topOffset = toolbar ? toolbar.getBoundingClientRect().bottom : headerNavigationBar.getBoundingClientRect().bottom
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if (cheatSheet) {
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var scrollTarget = this.closest('div')
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var selectorsTop = document.querySelector('.nav-container .selectors').querySelector('div').getBoundingClientRect().top
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if (this.tagName === 'H3') topOffset = selectorsTop
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window.scrollTo(0, computePosition(scrollTarget, 0) - topOffset)
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} else {
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window.scrollTo(0, computePosition(this, 0) - topOffset)
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}
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}
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window.addEventListener('load', function jumpOnLoad (e) {
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var fragment, target
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if ((fragment = decodeFragment(window.location.hash)) && (target = document.getElementById(fragment))) {
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jumpToAnchor.bind(target)()
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setTimeout(jumpToAnchor.bind(target), 0)
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}
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window.removeEventListener('load', jumpOnLoad)
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})
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Array.prototype.slice.call(document.querySelectorAll('a[href^="#"]')).forEach(function (el) {
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var fragment, target
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if ((fragment = decodeFragment(el.hash)) && (target = document.getElementById(fragment))) {
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el.addEventListener('click', jumpToAnchor.bind(target))
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}
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})
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})()
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