js横竖屏判断_阻止事件冒泡_模拟触发点击事件

横屏监听

var updateOrientation =function(){
    if(window.orientation=='-90'|| window.orientation=='90'){
        console.log('为了更好的体验，请将手机/平板竖过来！');
     }else{
        console.log('竖屏状态');
    }
};
var supportsOrientationChange = "onorientationchange" in window,
    orientationEvent = supportsOrientationChange ? "orientationchange" : "resize";// 监听事件
window.addEventListener(orientationEvent,updateOrientation);

HTML5标签兼容

(function(){
  var e = "abbr,article,aside,audio,canvas,datalist,details,dialog,eventsource,figure, footer,header,hgroup,mark,menu,meter,nav,output,progress,section,time,video".split(','), 
            i= e.length;
  while(i--){
        document.createElement(e[i]);
  }
})();

取消浏览器默认行为

function stopDefault( e ) {
    if ( e && e.preventDefault ){
        e.preventDefault();
    }else{
        window.event.returnValue = false;
    }
    return false;
}

阻止事件冒泡

function stopBubble(e){
    if (e && e.stopPropagation) {
        e.stopPropagation();
    }else if (window.event) {
        window.event.cancelBubble = true;
    }
}

模拟触发点击事件

function simulateClick(el) {
  var evt;
  if (document.createEvent) { // DOM Level 2 standard
    evt = document.createEvent("MouseEvents");
    evt.initMouseEvent("click", true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
    el.dispatchEvent(evt);
  } else if (el.fireEvent) { // IE
    el.fireEvent('onclick');
  }
}

createEvent(eventType)