Breaking News: Grepper is joining You.com. Read the official announcement!

validate form using javascript

Add Answer

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

answer validate form using javascript

related javascript function to validate form fields

related form validation javascript

related javascript form validation

related JS Form Validation using

related validation of form using js

validate form using javascript

Comment

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

Link to this answer
Share Copy Link

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 8/10 Helpfulness 4/10 Language javascript

Source: chat.openai.com

Tags: form-fields form

Link to this answer
Share Copy Link

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

Link to this answer
Share Copy Link

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

Link to this answer
Share Copy Link

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

Link to this answer
Share Copy Link

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

Link to this answer
Share Copy Link

Contributed on Sep 01 2022

Annoyed Armadillo

0 Answers Avg Quality 2/10

validate form using javascript

Contents

More Related Answers

validate form using javascript

Closely Related Answers

javascript function to validate form fields

form validation javascript

javascript form validation

JS Form Validation using

validation of form using js

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.