File : prosemirror-view/domchange.js at master · ProseMirror/prosemirror-view · GitHub
code Fragment
if (browser.chrome && view.lastKeyCode === 8) {
for (let off = toOffset; off > fromOffset; off--) {
let node = parent.childNodes[off - 1], desc = node.pmViewDesc
if (node.nodeType == "BR" && !desc) { toOffset = off; break }
if (!desc || desc.size) break
}
}