| 1 | module.exports = function walk (node, fn) {
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| 2 | var current = node
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| 3 | while (current) {
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| 4 | fn(current)
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| 5 | current = nextNode(current, node)
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| 6 | }
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| 7 | }
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| 8 |
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| 9 | function nextNode (current, root) {
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| 10 | var result = current.firstChild
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| 11 | while (current && !result && current !== root) {
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| 12 | result = current.nextSibling
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| 13 | current = current.parentNode
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| 14 | }
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| 15 | return result
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| 16 | }
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