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validate form using javascript

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rolewest answered on September 1, 2022 Popularity 10/10 Helpfulness 2/10

answer validate form using javascript

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validate form using javascript

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let input_value = document.forms["myForm"]["myInputField"].value;
if(input_value == undefined || input_value.trim() == "") {
  console.log("InputName is required") 
}

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript using

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Contributed on Oct 28 2022

rolewest

0 Answers Avg Quality 2/10

Closely Related Answers

javascript function to validate form fields

Comment

function validateForm() {
  // Get the values of the form fields
  var name = document.getElementById('name').value;
  var email = document.getElementById('email').value;
  var password = document.getElementById('password').value;

  // Create a variable to track the validation status
  var isValid = true;

  // Validate the name field
  if (name === '') {
    isValid = false;
    alert('Please enter your name.');
  }

  // Validate the email field
  if (email === '') {
    isValid = false;
    alert('Please enter your email address.');
  } else if (!isValidEmail(email)) {
    isValid = false;
    alert('Please enter a valid email address.');
  }

  // Validate the password field
  if (password === '') {
    isValid = false;
    alert('Please enter your password.');
  } else if (password.length < 6) {
    isValid = false;
    alert('Password should be at least 6 characters long.');
  }

  // Return the validation status
  return isValid;
}

// Helper function to validate email using regular expression
function isValidEmail(email) {
  var emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
  return emailRegex.test(email);
}

Popularity 9/10 Helpfulness 4/10 Language javascript

Source: chat.openai.com

Tags: form-fields form

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Contributed on Jul 15 2023

Rosemarie Rosario

0 Answers Avg Quality 2/10

form validation javascript

Comment

HTML and Javasript

//HTML
<form action="#" name="PracticeForm" onsubmit="return formValidation()" method="post" id="FormID">
        <div class="form">
            <div id="formName">
                <label for="fname">Name:</label>
                <input type="text" name="fname"><b><span class="error" style="color:red"></span></b>
            </div><br>
            <div id="formEmail">
                <label for="femail">Email:</label>
                <input type="text" name="femail"><b><span class="error" style="color:red"></span></b>
            </div>
            <br>
            <div class="submit_btn">
                <input type="submit" value="Submit" id="submit_btn">
            </div>
        </div>
    </form>

//Javascript 

function clearErrors() {
        error = document.getElementsByClassName('error');
        for (let item of error){
            item.innerHTML = '';
        }
    }

        function setErrorMessage(id, ErrorMessage){
        element = document.getElementById(id);
        element.getElementsByClassName("error")[0].innerHTML = ErrorMessage;
    }

    function formValidation(){
        var returnval = true;
        clearErrors();
        var name = document.forms['PracticeForm']['fname'].value;
        if (name.length != 11){
            setErrorMessage('formName', "*Please Enter Valid Name!!");
            returnval = false;
        }
        var email = document.forms['PracticeForm']['femail'].value;
        if (email.length != 11){
            setErrorMessage('formEmail', "*Please Enter Valid Email!!");
            returnval = false;
        }
        return returnval;      
}

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jan 19 2023

python

0 Answers Avg Quality 2/10

javascript form validation

Comment

<form id="myForm" onsubmit="return validateForm()">
    <label for="name">Name:</label><br>
    <input type="text" id="name" name="name"><br>
    <label for="email">Email:</label><br>
    <input type="text" id="email" name="email"><br>
    <input type="submit" value="Submit">
</form>
<script>
function validateForm() {
    var name = document.getElementById("name").value;
    var email = document.getElementById("email").value;
    var errorMessages = [];

    // Check if name is empty
    if (name.trim() === "") {
        errorMessages.push("Name is required");
    }

    // Check if email is empty and if it's a valid email format
    if (email.trim() === "") {
        errorMessages.push("Email is required");
    } else if (!isValidEmail(email)) {
        errorMessages.push("Invalid email format");
    }

    // Display error messages if any
    if (errorMessages.length > 0) {
        alert(errorMessages.join("\n"));
        return false; // Prevent form submission
    }

    return true; // Allow form submission
}

// Function to validate email format
function isValidEmail(email) {
    var emailRegex = /\S+@\S+\.\S+/;
    return emailRegex.test(email);
}
  
</script>

Popularity 9/10 Helpfulness 2/10 Language html

Source: chat.openai.com

Tags: html

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Contributed on Apr 03 2024

Shaniba Shanif

0 Answers Avg Quality 2/10

JS Form Validation using

Comment

const username = document.getElementById('username').value;
const password = document.getElementById('password').value;
const email = document.getElementById('email').value;
let isValid = true;

if (email.indexOf('@') === -1) {
    console.log('Invalid email address: "@" is missing.');
    isValid = false;
}

if (username.indexOf(' ') !== -1) {
    console.log('Invalid username: spaces are not allowed.');
    isValid = false;
}

if (password.length < 8) {
    console.log('Invalid password: must be at least 8 characters long.');
    isValid = false;
}

if (password.indexOf(username) !== -1) {
    console.log('Invalid password: the password should not contain the username.');
    isValid = false;
}

// Use regular expressions for more complex validations
const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
if (!emailRegex.test(email)) {
    console.log('Invalid email format.');
    isValid = false;
}

const usernameRegex = /^\S+$/; // No spaces allowed
if (!usernameRegex.test(username)) {
    console.log('Invalid username: spaces are not allowed.');
    isValid = false;
}

if (isValid) {
    console.log('Form is valid!');
    // Submit form or further processing
} else {
    console.log('Form is invalid.');
}

Popularity 8/10 Helpfulness 2/10 Language javascript

Source: chatgpt.com

Tags: javascript j

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Contributed on Jun 06 2024

David Mchale

0 Answers Avg Quality 2/10

validation of form using js

Comment

-1

javascript form validation

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Sep 01 2022

Annoyed Armadillo

0 Answers Avg Quality 2/10

validate form using javascript

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