JS can realize listening F5 page refresh child iframe and the parent page does not refresh the method _javascript skills

The focus is to prevent the default refresh, so that the external page does not refresh, and then specify to refresh the IFRAME, I give the following ideas

document.onkeypress = function (e) {
  if (E.keycode = = 116) {
    E.preventdefault ()//organization defaults to refresh
    var iframesrc = IFRAME.SRC;
    IFRAME.SRC = iframesrc;
  }

The IFRAME page is written as follows:

var iframesrc = parent.iframe.src;
document.onkeypress = function (e) {
  e.preventdefault ();
  PARENT.FRAME.SRC = iframesrc;
}

The above JS can be implemented to monitor the F5 page refresh child iframe and the parent page does not refresh the method is small set to share all the content, hope to give you a reference, but also hope that we support cloud habitat community.