INCORRECT VERSION

const openExternalPage = (title, url) => {

let mytitle = encodeURIComponent(title)

let myurl = encodeURIComponent(url)

selectMenu({ keyp: false })

è throws warning
Warning: Cannot update a component (`Header`) while rendering a different component (`Layout`). To locate the bad setState() call inside `Layout

const openNewTab = () => {

window.open(`${externalurl}iframe/${mytitle}/${myurl}`, '_blank')

    }

return openNewTab()

  }

if (!!keyp) {

openExternalPage(content, url)

  }

CORRECT VERSION

const openExternalPage = (title, url) => {

let mytitle = encodeURIComponent(title)

let myurl = encodeURIComponent(url)

// selectMenu({ keyp: false })

const openNewTab = () => {

window.open(`${externalurl}iframe/${mytitle}/${myurl}`, '_blank')

    }

return openNewTab()

  }

if (!!keyp) {

openExternalPage(content, url)

  }

useEffect(() => {

if (!!keyp) {

selectMenu({ keyp: false })

    }

  }, [keyp])