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  • 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 + "" + hours + " 小时 "
                    + minutes + " 分钟 " + seconds + "";
                    
                    // 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

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  • 原文地址:https://www.cnblogs.com/expedition/p/11408927.html
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