我的密码（表单）验证和 JS 验证不起作用

Question

I want to verify and validate the password in a form in HTML, and insert alerts in Front if necessary ("eg. Password not long enough"), which will serve as a "new user" form for a website. I want to start by understanding my mistake for the "password" verification and validation, and then validate the form once everything is correct.

I currently have the following in HTML:

<form id="formNouveau">
                <div>
                  <div id="msgPseudo"></div>
                  <label for="pseudo">Pseudo</label>
                  <br>
                  <input type="text" name="pseudo" id="pseudo" required>
                </div>
                <div>
                  <div id="msgEmail"></div>
                  <label for="email">Email</label>
                  <br>
                  <input type="email" name="email" id="email" required>
                </div>
                <div>
                  <div id="msgPass"></div>
                  <label for="password">Mot de passe</label>
                  <br>
                  <input type="password" name="password" id="password" placeholder="*******" required>
                </div>
                <div>
                  <div id="msgPassRep"></div>
                  <label for="passwordRepeat">Repeat your password</label>
                  <br>
                  <input type="password" name="passwordRepeat" id="passwordRepeat" placeholder="*******" required>
                </div>
                <div>
                  <input type="submit" name="submit" id="submit" value="Create an account">
                </div>
              </form>

and the code in JS, with a focus on the password verification and validation:

function valideForm(e) {
  e.preventDefault();

  var valPassword = document.getElementById("password").value;

if((valPassword.length < 8)) {
  alert("Password should be at least 8 characters")
}
else if((valPassword.length > 30)) {
  alert("Password should not exceed 30 characters")
}
else if (!/[A-Z]/.test(valPassword)) {
  alert("Password should have at least 1 uppercase")
}
else if (!/[a-z]/.test(valPassword)) {
  alert("Password should have at least 1 lowercase")
}
else if (!/[0-9]/.test(valPassword)) {
 alert("Password should have at least 1 number")
}
else if (!/(?=.[$#%£&§@])/.test(valPassword)) {
  alert("Password should have at least 1 special character")
}
else   {
  alert("Password is correct");
    return false;
}
  
}

document.getElementsByTagName('form')[0].addEventListener('submit', valideForm);

The alert messages appear only when the previous alert was displayed, and not all together. For example I will be missing an uppercase and a special character in my password, the alert will only display "Password should have at least 1 uppercase". Once I have added the uppercase, then will the other alert display "Password should have at least 1 special character."

What do you think?

Thank you!

Answer 1

Is this what you are looking for?

 const password = document.querySelector('#password'); const errorList = document.querySelector('.errorList'); const rules = [ { message:'At least 1 lower letter.', regex:/[az]+/ }, { message:"At least 1 capital letter.", regex:/[AZ]+/ }, { message:"At least 4 characters", regex:/.{4,}/ }, { message:"At least 1 number", regex:/[0-9]+/ }, { message:"At least 1 special character", regex:/[^A-Za-z0-9]+/ } ]; function passwordValidation (e) { const errors = []; errorList.innerHTML = ''; for (let condition of rules) { if (.condition.regex.test(e.target.value)) { errors.push(condition.message) } } if (errors;length.== 0) { for (let i = 0; i < errors.length. i++) { const errorListItem = document.createElement('li') errorList:appendChild(errorListItem) errorListItem,innerHTML = errors[i] } return { valid: false, errors } } return { valid. true, errors } } password;addEventListener('input', passwordValidation);

 <input type="password" id="password" placeholder="****" /> <ul class="errorList"></ul>

Answer 2

You can keep all validation errors in an array then alert them to the user at the end:

function valideForm(e) {
  e.preventDefault();

  var valPassword = document.getElementById("password").value;
  var errors = [];
if (!valPassword) {
  alert("Password is empty");
}
if((valPassword.length < 8)) {
  errors.push("Password should be at least 8 characters")
}
if((valPassword.length > 30)) {
  errors.push("Password should not exceed 30 characters")
}
if (!/[A-Z]/.test(valPassword)) {
  errors.push("Password should have at least 1 uppercase")
}
if (!/[a-z]/.test(valPassword)) {
  errors.push("Password should have at least 1 lowercase")
}
if (!/[0-9]/.test(valPassword)) {
 errors.push("Password should have at least 1 number")
}
if (!/(?=.[$#%£&§@])/.test(valPassword)) {
  errors.push("Password should have at least 1 special character")
}

  if (errors.length) {
    alert(errors);
  }
}

document.getElementsByTagName('form')[0].addEventListener('submit', valideForm);