ページの1部分を新規ページに切り出す

scrapbox.PopupMenu.addButton({
  title: 'NewPage',
  onClick: text => {
    const lines = text.split(/[\r\n]/g)
    const title = lines[0]
      .trim()
      .replace(/\[[^\]]+.icon\]/gm, '')
      .replace(/[\[\]]/g, '')
    const projectRoot = (() => {
      const tmp = location.href.split('/')
      tmp.pop()
      return tmp.join('/')
    })()
    const currentPageTitle = decodeURIComponent(location.href.split(/\//g).pop())
    lines.unshift(`from [${currentPageTitle}]`)
    const body = encodeURIComponent(lines.join('\n'))
    window.open(`${projectRoot}/${title}?body=${body}`)
    return `[${title}]`
  }
})