响应式布局@media

 

 

 

 

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补充：

创建media.js，适用于手机端,文件内容：

(function (win) {
      resizeRoot();
      function resizeRoot() {
          var wWidth = document.documentElement.clientWidth;
          if (wWidth > 750) wWidth = 750;
          else if (wWidth <320) wWidth = 320;
          document.documentElement.style.fontSize = wWidth / 7.5 + 'px';
      }
      window.onresize = resizeRoot;
})(window);

　　

或者，创建rem.js，适用于pc+wap相应，

//网易版
(function(doc, win) {
	var docEl = doc.documentElement,
		isIOS = navigator.userAgent.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/),
		dpr = isIOS ? Math.min(win.devicePixelRatio, 3) : 1,
		dpr = window.top === window.self ? dpr : 1, //被iframe引用时，禁止缩放
		dpr = 1,
		scale = 1 / dpr,
		resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize';
	docEl.dataset.dpr = dpr;
	var metaEl = doc.createElement('meta');
	metaEl.name = 'viewport';
	metaEl.content = 'initial-scale=' + scale + ',maximum-scale=' + scale + ', minimum-scale=' + scale;
	docEl.firstElementChild.appendChild(metaEl);
	var recalc = function() {
		var width = docEl.clientWidth;
		if(width / dpr > 1333) {
			width = 1333 * dpr;
		}
		// 乘以100，px : rem = 100 : 1
		docEl.style.fontSize = 100 * (width / 1333) + 'px';
	};
	recalc()
	if(!doc.addEventListener) return;
	win.addEventListener(resizeEvt, recalc, false);
})(document, window);

　　

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