js实现canvas验证码显示验证效果-html代码-BFW代码库

js实现canvas验证码显示验证效果

代码语言：html

所属分类：验证

代码描述：js实现canvas验证码显示验证效果

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>

    <style type="text/css">
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            width: 100%;
            height: 100%;
            font-size: 16px;
        }

        body {
            width: 100%;
            height: 100%;
            -moz-user-select: none;
            /*火狐*/
            /*禁止用户在页面选择文字*/
            -webkit-user-select: none;
            /*webkit浏览器*/
            -ms-user-select: none;
            /*IE10*/
            -khtml-user-select: none;
            /*早期浏览器*/
            user-select: none;
        }

        .code {
            padding-top: 150px;
            width: 400px;
            margin: 0 auto;
        }

        .input-val {
            width: 295px;
            background: #ffffff;
            height: 2.8rem;
            padding: 0 2%;
            border-radius: 5px;
            border: none;
            border: 1px solid rgba(0, 0, 0, .2);
            font-size: 1.0625rem;
        }

        #canvas {
            float: right;
            display: inline-block;
            border: 1px solid #ccc;
            border-radius: 5px;
            cursor: pointer;
        }

        .btn {
            width: 100px;
            height: 40px;
            background: #f1f1f1;
            border: 1px solid #ccc;
            border-radius: 5px;
            margin: 20px auto 0;
            display: block;
            font-size: 1.2rem;
            color: #e22e1c;
            cursor: pointer;
        }
    </style>
</head>
<body>
    <div class="code">
        <input type="text" value="" placeholder="请输入验证码（不区分大小写）" class="input-val" />
        <canvas id="canvas" width="100" height="43"></canvas>
        <button class="btn">提交</button>
    </div>

<script type="text/javascript" src="http://repo.bfw.wiki/bfwrepo/js/jquery-3.2.1.min.js"></script>
<script>
    function code_draw() {
        var canvas_width = $('#canvas').width(); var canvas_height = $('#canvas').height(); var canvas = document.getElementById("canvas"); var context = canvas.getContext("2d"); canvas.width = canvas_width; canvas.height = canvas_height; var sCode = "A,B,C,E,F,G,H,J,K,L,M,N,P,Q,R,S,T,W,X,Y,Z,1,2,3,4,5,6,7,8,9,0"; var .........完整代码请登录后点击上方下载按钮下载查看