When using the REM layout, stick the following code in the JS file

function Font (w) {var w = W | | 640, Docel = document.documentelement, resizeevt = ' orientationchange ' in Window?            ' Orientationchange ': ' resize ', Recalc = function () {var clientwidth = docel.clientwidth;            if (!clientwidth) return;        docEl.style.fontSize = * (clientwidth/w) + ' px ';    };    if (!document.addeventlistener) return;    Window.addeventlistener (Resizeevt, Recalc, false); Document.addeventlistener (' domcontentloaded ', Recalc, false);} Font ();(function (Doc, win) {var docel = doc.documentelement, resizeevt = ' orientationchange ' in window?            ' Orientationchange ': ' resize ', Recalc = function () {var clientwidth = docel.clientwidth;            if (!clientwidth) return;        docEl.style.fontSize = * (clientwidth/640) + ' px ';    };    if (!doc.addeventlistener) return;    Win.addeventlistener (Resizeevt, Recalc, false); Doc.addeventlistener (' domcontentloaded ', Recalc,false);})  (document, window);

　　

When using the REM layout, stick the following code in the JS file