Text selection polyfill for IE8
Implements the following (so far)

• window.getSelection()
• document.createRange()
• input.selectionStart
• input.selectionEnd
• Selection (Class) ----
• selection.rangeCount
• selection.anchorNode
• selection.anchorOffset
• selection.focusNode
• selection.focusOffset
• selection.getRangeAt(index)
• selection.removeAllRanges()
• selection.addRange(range)
• selection.deleteFromDocument()
• selection.toString()
• Range (Class) ----
• range.commonAncestorContainer
• range.collapsed
• range.startContainer
• range.startOffset
• range.endContainer
• range.endOffset
• range.setStart(node, offset)
• range.setEnd(node, offset)
• range.selectNodeContents(node)
• range.collapse(toStart)
• range.compareBoundaryPoints(how, range)
• range.getBoundingClientRect()
• range.cloneRange()
• range.detach()
• range.toString()

https://dvcs.w3.org/hg/editing/raw-file/tip/editing.html#selections