javaScript 实现倒计时 + 获取网页中的文字

一、倒计时

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>文档标题</title>
</head>
<body>
    <p id="demo"></p>
    <script>
        // Set the date we're counting down to
            var countDownDate = new Date("Feb 1 2100 21:23").getTime();

            // Update the count down every 1 second
            var x = setInterval(function() {

                // Get todays date and time
                var now = new Date().getTime();
                
                // Find the distance between now an the count down date
                var distance = countDownDate - now;
                
                // Time calculations for days, hours, minutes and seconds
                var days = Math.floor(distance / (1000 * 60 * 60 * 24));
                var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
                var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
                var seconds = Math.floor((distance % (1000 * 60)) / 1000);
                
                // Output the result in an element with id="demo"
                document.getElementById("demo").innerHTML = days + " 天 " + hours + " 小时 "
                + minutes + " 分钟 " + seconds + " 秒";
                
                // If the count down is over, write some text 
                if (distance < 0) {
                    clearInterval(x);
                    document.getElementById("demo").innerHTML = "EXPIRED";
                }
            }, 1000);
    </script>
</body>
</html>

 

 

二、获取文字

<html>
<head>
<meta charset="UTF-8">
<title>OCR</title>

<style>
*{
    padding:0;
    margin:0;
}

.ddd{
    display:block;
    width:15%;
    height:400px;
    background-color:red;
    margin-left:82%;
    margin-top:-45%;
}
</style>
</head>
<body>

<div id="xxx" >

    确认过眼神 我遇上对的人<br />

    我策马出征 马蹄声如泪奔<br />

    青石板上的月光照进这山城<br />

    我一路的跟 你轮回声 我对你用情极深<br />

    洛阳城旁的老树根<br />

    像回忆般延伸你问<br />

    经过是谁的心跳声<br />

    我拿醇酒一坛饮恨<br />

    你那千年眼神是我<br />

    醉醉坠入赤壁的 伤痕<br />

    确认过眼神 我遇上对的人<br />

</div>

        <input type="text" id="in" />


<script>
    var oContent =document.getElementById('xxx');
    oContent.onmouseup = function(){
        var xx = selectText();
        if(xx == ""){
        }else{
            document.getElementById('in').value = xx;
        }
    };  

    function selectText(){
        if(document.Selection){       
            //ie浏览器
            return document.selection.createRange().text;          
        }else{    
            //标准浏览器
            return window.getSelection().toString();     
        }     
    }

</script>

</body>
</html>

 但是无法获取 网页中 pdf 的文字内容

posted @ 2019-08-25 19:12  远征i  阅读(590)  评论(0)  编辑  收藏  举报