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30 lines
727 B
JavaScript
30 lines
727 B
JavaScript
;(function () {
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var wrapper = document.getElementById('wrapper')
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var els = Array.prototype.slice.call(wrapper.getElementsByTagName('*'), 0)
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.filter(function (el) {
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return el.parentNode === wrapper &&
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el.tagName.match(/H[1-6]/) &&
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el.id
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})
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var l = 2
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var toc = document.createElement('ul')
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toc.innerHTML = els.map(function (el) {
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var i = el.tagName.charAt(1)
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var out = ''
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while (i > l) {
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out += '<ul>'
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l++
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}
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while (i < l) {
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out += '</ul>'
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l--
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}
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out += '<li><a href=\'#' + el.id + '\'>' +
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(el.innerText || el.text || el.innerHTML) +
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'</a>'
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return out
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}).join('\n')
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toc.id = 'toc'
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document.body.appendChild(toc)
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})()
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