单引号的javascript验证


javascript validation of single quotes

我的注册表中有一个密码字段。下面是JavaScript验证的代码。

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if(document.getElementById('txtPassword').value == '' || document.getElementById('txtPassword').value == 'Password' ){
            alert("Please enter Password");
            document.getElementById('txtPassword').focus();
            return false;
        }


      else if (document.getElementById('txtPassword').value.length < 8)
       {
               alert('Please ensure your password has at least eight characters, a mix of upper and lowercase and at least one number');
               return false;
       }


      else if ( (! document.getElementById('txtPassword').value.match(/[a-z]/) ) || (! document.getElementById('txtPassword').value.match(/[A-Z]/) ) ) {
               alert('Please ensure your password has at least eight characters, a mix of upper and lowercase and at least one number');
               return false;
       }


      else if (!document.getElementById('txtPassword').value.match(/\d+/)) {
               alert('Please ensure your password has at least eight characters, a mix of upper and lowercase and at least one number');
               return false;
       }

        else if (document.getElementById('txtPassword').length < 8)
       {
               alert('Please ensure your password has at least eight characters, a mix of upper and lowercase and at least one number');
               return false;
       }

我需要检查一下单引号。如果用户在密码字段中输入单引号并点击输入，则应弹出错误"在此字段中避免单引号"。

怎么做？

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else if (document.getElementById('txtPassword').value.indexOf("'") != -1) {
    alert("Avoid single quotes in this field");
    return false;
}

这里是一个简单的测试用例。如果您制作了一个HTML页面，将它放在head标签中，在浏览器中打开它，您会看到它工作正常：

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var value1 ="abc'def";
var value2 ="abcdef";
if(value1.indexOf("'") != -1)
    alert(value1 +" contains a '");
else
    alert(value1 +" does not contain a '");
if(value2.indexOf("'") != -1)
    alert(value2 +" contains a '");
else
    alert(value2 +" does not contain a '");

号

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使用此regex进行密码检查

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^(?=.*\d)(?=.*[a-zA-Z]).{8,}

目前，您正在进行大量的验证检查，以避免使用上面的regex。

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if (! /^(?=.*\d)(?=.*[a-zA-Z]).{8,}/.test(txtPass)) {
    flag = false;
}
else if(txtPass.indexOf("'") != -1) {
    flag = false;
}

if (!flag)
    alert("Please ensure your password has at least eight characters, a mix of upper and lowercase and at least one number");

。

参考现场演示

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