JavaScript如何實(shí)現(xiàn)隨機(jī)碼的生成與校驗(yàn)

發(fā)布時(shí)間：2021-04-29 14:30:37 來(lái)源：億速云閱讀：252 作者：小新欄目：開(kāi)發(fā)技術(shù)

這篇文章給大家分享的是有關(guān)JavaScript如何實(shí)現(xiàn)隨機(jī)碼的生成與校驗(yàn)的內(nèi)容。小編覺(jué)得挺實(shí)用的，因此分享給大家做個(gè)參考，一起跟隨小編過(guò)來(lái)看看吧。

JavaScript有什么特點(diǎn)

1、js屬于一種解釋性腳本語(yǔ)言；2、在絕大多數(shù)瀏覽器的支持下，js可以在多種平臺(tái)下運(yùn)行，擁有著跨平臺(tái)特性；3、js屬于一種弱類(lèi)型腳本語(yǔ)言，對(duì)使用的數(shù)據(jù)類(lèi)型未做出嚴(yán)格的要求，能夠進(jìn)行類(lèi)型轉(zhuǎn)換，簡(jiǎn)單又容易上手；4、js語(yǔ)言安全性高，只能通過(guò)瀏覽器實(shí)現(xiàn)信息瀏覽或動(dòng)態(tài)交互，從而有效地防止數(shù)據(jù)的丟失；5、基于對(duì)象的腳本語(yǔ)言，js不僅可以創(chuàng)建對(duì)象，也能使用現(xiàn)有的對(duì)象。

JavaScript之隨機(jī)碼的生成與校驗(yàn)，具體內(nèi)容如下

由于獲取事件源有兩種寫(xiě)法，所以在此處都附上：

這個(gè)是直接用var去定義的

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>隨機(jī)驗(yàn)證碼校驗(yàn)</title>
    <style type="text/css">
        #code{
            width: 100px;
            height: 100px;
            background-color: #ddd;
            padding: 10px;
            line-height: 100px;
            text-align: center;
            font-size: 20px;
            color: red;
            /*font-weight: bold;*/
        }
    </style>
</head>
<body>
    <div id="code"></div>
    <input type="text" name="" id="newCode">
    <input type="button" name="" id="validate" value="驗(yàn)證">
    <script type="text/javascript">
        window.onload = function (){
            var code;
            // 1.獲取對(duì)應(yīng)的標(biāo)簽
            var codeDiv = document.getElementById("code");
            var newCodeInput = document.getElementById("newCode");
            var validate = document.getElementById("validate");

            // 加載頁(yè)面獲取對(duì)應(yīng)驗(yàn)證碼
            creatCode()

            // 1.獲取min到max之間的整數(shù) 1~100
            function random(max,min){
                return Math.floor(Math.random()*(max-min)+min);
            }

            function creatCode(){
                code = "";
                // 設(shè)置長(zhǎng)度
                var codeLenth = 4;
                var randomCode =[0,1,2,3,4,5,6,7,8,9,"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"];
                for(var i=0;i<codeLenth;i++){
                    // 設(shè)置隨機(jī)范圍36范圍
                    var index = random(0,36);
                    code += randomCode[index];
                }
                codeDiv.innerHTML = code;
            }
            // 驗(yàn)證按鈕校驗(yàn)
            validate.onclick = function (){
                // 獲取輸入用戶的驗(yàn)證碼
                var newCode = newCodeInput.value.toUpperCase();
                if (newCode === code){
                    // 驗(yàn)證成功  跳轉(zhuǎn)對(duì)應(yīng)的網(wǎng)址
                    window.location.href = "http://www.baidu.com";
                }else {
                    // 驗(yàn)證失敗
                    alert("驗(yàn)證失敗，請(qǐng)重新輸入")
                    // 輸入框置空
                    newCodeInput.value = "";
                    // 重新獲取驗(yàn)證碼
                    creatCode();
                }
            }
        }
    </script>
</body>
</html>

這個(gè)是用function定義變量的：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>隨機(jī)驗(yàn)證碼校驗(yàn)</title>
    <style type="text/css">
        #code{
            width: 100px;
            height: 100px;
            background-color: #ddd;
            padding: 10px;
            line-height: 100px;
            text-align: center;
            font-size: 20px;
            color: red;
            /*font-weight: bold;*/
        }
    </style>
</head>
<body>
    <div id="code"></div>
    <input type="text" name="" id="newCode">
    <input type="button" name="" id="validate" value="驗(yàn)證">
    <script type="text/javascript">
        window.onload = function (){
            var code;
            // 1.獲取對(duì)應(yīng)的標(biāo)簽(獲取事件源)
            function $(id){
                return typeof id === "string"?document.getElementById(id):null;
            }

            // 加載頁(yè)面獲取對(duì)應(yīng)驗(yàn)證碼
            creatCode()

            // 1.獲取min到max之間的整數(shù) 1~100
            function random(max,min){
                return Math.floor(Math.random()*(max-min)+min);
            }

            function creatCode(){
                code = "";
                // 設(shè)置長(zhǎng)度
                var codeLenth = 4;
                var randomCode =[0,1,2,3,4,5,6,7,8,9,"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"];
                for(var i=0;i<codeLenth;i++){
                    // 設(shè)置隨機(jī)范圍36范圍
                    var index = random(0,36);
                    code += randomCode[index];
                }
                $("code").innerHTML = code;
            }
            // 驗(yàn)證按鈕校驗(yàn)
            $("validate").onclick = function (){
                // 獲取輸入用戶的驗(yàn)證碼
                var newCode = $("newCode").value.toUpperCase();
                if (newCode === code){
                    // 驗(yàn)證成功  跳轉(zhuǎn)對(duì)應(yīng)的網(wǎng)址
                    window.location.href = "http://www.baidu.com";
                }else {
                    // 驗(yàn)證失敗
                    alert("驗(yàn)證失敗，請(qǐng)重新輸入")
                    // 輸入框置空
                    $("newCode").value = "";
                    // 重新獲取驗(yàn)證碼
                    creatCode();
                }
            }
        }
    </script>
</body>
</html>

兩種方式所實(shí)現(xiàn)效果一樣。附上效果圖：

JavaScript如何實(shí)現(xiàn)隨機(jī)碼的生成與校驗(yàn)

當(dāng)輸入錯(cuò)誤的數(shù)據(jù)進(jìn)行驗(yàn)證時(shí)，會(huì)提示：

JavaScript如何實(shí)現(xiàn)隨機(jī)碼的生成與校驗(yàn)

當(dāng)輸入正確的數(shù)據(jù)進(jìn)行驗(yàn)證時(shí)，點(diǎn)擊驗(yàn)證，如果驗(yàn)證成功，會(huì)跳轉(zhuǎn)指定路徑。

感謝各位的閱讀！關(guān)于“JavaScript如何實(shí)現(xiàn)隨機(jī)碼的生成與校驗(yàn)”這篇文章就分享到這里了，希望以上內(nèi)容可以對(duì)大家有一定的幫助，讓大家可以學(xué)到更多知識(shí)，如果覺(jué)得文章不錯(cuò)，可以把它分享出去讓更多的人看到吧！

向AI問(wèn)一下細(xì)節(jié)

JavaScript如何實(shí)現(xiàn)隨機(jī)碼的生成與校驗(yàn)

JavaScript有什么特點(diǎn)

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