Set the JS code for the root font

The mobile side often involves using REM to lay out, so it's important to set the root font. Here is the JS code to set the root font, for reference only!

1(function(Doc, win) {2     varDocel =Doc.documentelement,3resizeevt = ' Orientationchange 'inchWindow? ' Orientationchange ': ' Resize ',4Recalc =function () {5             varClientWidth =Docel.clientwidth;6             if(!clientwidth)return;7             if(clientwidth>=640){8docEl.style.fontSize = ' 100px ';9}Else{TenDocEl.style.fontSize = + * (clientwidth/640) + ' px 'The //640 is the width of the design, which now seems to be 750.  One             } A         }; -  -     if(!doc.addeventlistener)return; theWin.addeventlistener (Resizeevt, Recalc,false); -Doc.addeventlistener (' domcontentloaded ', Recalc,false); -}) (document, window);

I hope you are the great God!

Set the JS code for the root font