[Javascript] How to fix iphone safari auto zoom in problem without `maximum-scale=1.0`

Solution 1: consider change font-size to 16px or above

Soution 2: using javascript

if(navigator.userAgent.indexOf('iPhone') > -1 ) {
    document
      .querySelector("[name=viewport]")
      .setAttribute("content","width=device-width, initial-scale=1, maximum-scale=1");
}