2024/11/7日工作总结

学习JS基础知识：
1.事件绑定：

点击查看代码 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<img id="龙泡泡" src="../imgs/年宝1.png"> <br>

<div class="cls">vivy</div><br>
<div class="cls">vimiiii</div><br>

<input type="checkbox" name="hobby">电影
<input type="checkbox" name="hobby">旅游
<input type="checkbox" name="hobby">游戏
<br>

<script>
    //获取：使用Document对象的方法来获取

    //getElementById:id获取，返回一个Element对象
    var img = document.getElementById("龙泡泡");
    //alert(img);
    img.src = "../imgs/年宝3.png";

    //getElementByTagTagName:标签名称获取，返回Element对象数组
    var divs = document.getElementsByTagName("div");
    for (let i = 0; i < divs.length; i++) {
        /*divs[i].style.color = 'red';*/
        divs[i].innerHTML = "hehe";
    }


    //getElementsByName:name属性值获取，返回Element对象数组
    var hobbys = document.getElementsByName("hobby");
    for (let i = 0; i < hobbys.length; i++) {
        /*alert(hobbys[i]);*/
        hobbys[i].checked = true;
    }

    //getElementsByClassName:根据class属性获取，返回Element对象数组
    var clss = document.getElementsByClassName("cls");
    /*for (let i = 0; i < clss.length; i++) {
        alert(clss[i]);
    }*/



</script>

</body>
</html>

2.常见事件：

点击查看代码 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<form id="register" action="#">
    <input type="text" name="username" />
    <input type="submit" value="提交">

</form>

<script>
    document.getElementById("register").onsubmit = function (){
        //ture：表单提交
        //false：表单不提交
        return false;
    }



</script>


</body>
</html>

3.表单验证：

点击查看代码 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>欢迎注册</title>
</head>
<body>
<div class="form-div">
    <div class="reg-content">
        <h1>欢迎注册</h1>
        <span>已有账号？</span><a href="#">登录</a>
    </div>
    <form id="reg-form" action="#" method="get">

        <table>

            <tr>
                <td>用户名</td>
                <td class="inputs">
                    <input name="username" type="text" id="username">
                    <br>
                    <span id="username_err" class="err_msg" style="display: none">此用户名不太受欢迎</span>
                </td>
            </tr>

            <tr>
                <td>密码</td>
                <td class="inputs">
                    <input name="password" type="password" id="password">
                    <br>
                    <span id="password_err" class="err_msg" style="display: none">密码格式有误</span>
                </td>
            </tr>

            <tr>
                <td>手机号</td>
                <td class="inputs">
                    <input name="tel" type="text" id="tel">
                    <br>
                    <span id="tel_err" class="err_msg" style="display: none">手机号格式有误</span>
                </td>
            </tr>

        </table>

        <div class="buttons">
            <input value="注 册" type="submit" id="reg_btn">
        </div>
        <br class="clear">
    </form>
</div>

<script>
    //验证用户名
    //1.获取用户名输入框
    var usernameInput = document.getElementById("username");
    //2.绑定onblur失去焦点事件
    usernameInput.onblur = checkUsername;

    function checkUsername() {
        //3.获取输入的用户名
        var username = usernameInput.value.trim();
        //4.判断是否符号规则
        //正则表达式：单词字符，6~12
        var reg = /^\w{6,12}$/;
        var flag = reg.test(username);
        //var flag = username.length >= 6 && username.length <= 12;
        if (flag) {
            //符合,重置提示信息
            document.getElementById("username_err").style.display = 'none';
        } else {
            //不符合，更改span，显示提示信息
            document.getElementById("username_err").style.display = '';
        }

        return flag;
    }

    //验证密码
    //1.获取密码输入框
    var passwordInput = document.getElementById("password");
    //2.绑定onblur失去焦点事件
    passwordInput.onblur = checkPassword;

    function checkPassword() {
        //3.获取输入的密码
        var password = passwordInput.value.trim();
        //4.判断是否符号规则
        //正则表达式：单词字符，6~12
        var reg = /^\w{6,12}$/;
        var flag = reg.test(password);
        //var flag = password.length >= 6 && password.length <= 12;
        if (flag) {
            //符合,重置提示信息
            document.getElementById("password_err").style.display = 'none';
        } else {
            //不符合，更改span，显示提示信息
            document.getElementById("password_err").style.display = '';
        }
        return flag;
    }

    //验证手机号
    //1.获取手机号输入框
    var telInput = document.getElementById("tel");
    //2.绑定onblur失去焦点事件
    telInput.onblur = checkTel;

    function checkTel() {
        //3.获取输入的手机号
        var tel = telInput.value.trim();
        //4.判断是否符号规则
        //正则表达式：数字，11，第一位是1
        var reg = /^[1]\d{10}$/;
        var flag = reg.test(tel);
        //var flag = tel.length === 11;
        if (flag) {
            //符合,重置提示信息
            document.getElementById("tel_err").style.display = 'none';
        } else {
            //不符合，更改span，显示提示信息
            document.getElementById("tel_err").style.display = '';
        }
        return flag;
    }


    //1.获取表单对象
    var regForm = document.getElementById("reg-form");
    //2.绑定onsubmit事件
    regForm.onsubmit = function () {
        //3.判断每一个表单项是否都符号要求
        var flag = checkUsername() && checkPassword() && checkTel();

        return flag;
    }

</script>

</body>
</html>

4.正则表达式：

点击查看代码 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<script>
    //单词，6~12
    var reg = /^\w{6,12}$/;
    var str = "abc";

    var flag = reg.test(str);
    alert(flag);
</script>

</body>
</html>
posted @ 2024-11-07 21:02  vivi_vimi  阅读(10)  评论(0)    收藏  举报