jquery4

1.单双击冲突解决

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <button>按钮</button>
    <script src="jquery.js"></script>
    <script>
        $(function () {
            var tim = null;
            $("button").click(function (event) {
                clearTimeout(tim);
                tim = setTimeout(function () {
                    console.log("单击")
                },300);
            });
            $("button").dblclick(function (event) {
                clearTimeout(tim);
                console.log("双击")
            })
        })
    </script>
</body>
</html>

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2.jQueryUI

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 排序（Sortable） - 默认功能</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
  <script src="//code.jquery.com/jquery-1.9.1.js"></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css">
  <style>
  #sortable { list-style-type: none; margin: 0; padding: 0; width: 60%; }
  #sortable li { margin: 0 3px 3px 3px; padding: 0.4em; padding-left: 1.5em; font-size: 1.4em; height: 18px; }
  #sortable li span { position: absolute; margin-left: -1.3em; }
  </style>
  <script>
  $(function() {
    $( "#sortable" ).sortable();
    $( "#sortable" ).disableSelection();
  });
  </script>
</head>
<body>

<ul id="sortable">
  <li class="ui-state-default"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 1</li>
  <li class="ui-state-default"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 2</li>
  <li class="ui-state-default"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 3</li>
  <li class="ui-state-default"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 4</li>
  <li class="ui-state-default"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 5</li>
  <li class="ui-state-default"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 6</li>
  <li class="ui-state-default"><span class="ui-icon ui-icon-arrowthick-2-n-s"></span>Item 7</li>
</ul>


</body>
</html>

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3.animate

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet"
  href="https://cdn.jsdelivr.net/npm/[email protected]/animate.min.css">
    <style>
        #box{
            width: 200px;
            height: 200px;
            line-height: 200px;
            text-align: center;
            background: green;
            color: #fff;
            position: absolute;
            top: 2000px;
        }
    </style>
</head>
<body>
    <div id="box" class="animated bounceInDown">qing</div>
    <script src="jquery.js"></script>
    <!--<h2 class="animated fadeOutRight">qing</h2>-->
    <script>
        $(function () {
            $(document).scroll(function () {
                var scrollTopHeight = $(this).scrollTop();
                if (scrollTopHeight >= 1000){
                    $("#box").addClass("animated slideInDown")
                }
            })
        })
    </script>
</body>
</html>

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4.移动端响应式@media

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        @media screen and (min-width: 1200px){
            body{
                background-color: red;
            }
        }

        @media screen and (min-width: 800px) and (max-width: 1200px){
            body{
                background-color: green;
            }
        }

        @media screen and (max-width: 800px){
            body{
                background-color:yellow;
            }
        }
    </style>
</head>
<body>

</body>
</html>

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5.单位介绍

1rem=html中的文字大小

/*获得页面宽度后动态修改html上的fontsize
* 320为iphone5设计稿下的页面宽度，如下设置后页面的页面在iphone5等宽屏幕上html
* 的font-size会变为100px，即 1rem = 100px    1px=0.01rem
* 所以设置元素尺寸的时候，如果测量设计稿 15px  则需设置尺寸为 (0.01*15)rem = 0.15rem   
*/


!(function(doc, win) {
    var docEle = doc.documentElement,
        evt = "onorientationchange" in window ? "orientationchange" : "resize",
        fn = function() {
            var width = docEle.clientWidth;
            console.log(width)
            width && (docEle.style.fontSize = 100 * (width / 375) + "px");
        };
     
    win.addEventListener(evt, fn, false);
    doc.addEventListener("DOMContentLoaded", fn, false);
 
}(document, window));

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6.三元运算

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <script>
        var a = 1 > 1 ? "真的":"假的";
        console.log(a);
    </script>
</body>
</html>

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