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form.html
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<!DOCTYPE html><html lang="en">
<head>
<meta charset="utf-8">
<title>form</title>
<link rel='stylesheet' href='form-style.css' type='text/css' />
</head>
<body>
<div class="maincontainer">
<form class="formwrapper">
<h2>Sign up form</h2>
<div class="formcontainer">
<div class="user">
<label>Full Name:</label>
<input class="fullName" type="text" >
<span class="fullNameError"></span>
</div>
<div class="email">
<label>Email:</label>
<input type="email" class="emailId">
</div>
<div class="mobile">
<label >Mobile Number:</label>
<input placeholder="(987)-999-000" class="mobile-no" type="text">
<span class="mobileOperator voda"><img src="./images/voda.PNG" /></span>
<span class="mobileOperator jio"><img src="./images/jio.PNG" /></span>
<span class="mobileOperator reliance"><img src="./images/reliance.PNG" /></span>
<span class="mobileOperator invalidOperator">Invalid Operator</span>
<span class="stateName"></span>
</div>
</div>
<div class="submit">
<button type="submit" class="submit-form">Submit</button>
</div>
</form>
</div>
<script>
const submitButtonEl = document.querySelector('form');
// Submit event fired when user clicks on Submit button.
submitButtonEl.addEventListener('submit', (e) => {
e.preventDefault();
// To get form input elements in constants.
const fullNameEl = document.querySelector('.fullName');
const emailEl = document.querySelector('.emailId');
const mobileNoEl = document.querySelector('.mobile-no');
let fullNameErrors = 0, emailErrors = 0, mobileNoErrors = 0, fullNameLengthErrors = 0;
let fullNameSplit = [];
const fullNameErrorEl = document.querySelector('.fullNameError');
fullNameSplit = fullNameEl.value.split(' ');
const firstName = fullNameSplit[0];
/* Checks following conditions for fullname:
Whether full name is blank.
Whether full name has minimum 2 words.
Whether full name has minimum 4 characters in every word.
If yes, then adds invalid class to input element and sets fullNameErrors error to 1.
*/
if (fullNameSplit === []) {
fullNameErrorEl.innerHTML = 'Full name cannot be blank';
fullNameEl.classList.add('invalid');
fullNameErrors = 1;
} else if (fullNameSplit.length < 2) {
fullNameErrorEl.innerHTML = 'Last name missing';
fullNameEl.classList.add('invalid');
fullNameErrors = 1;
} else {
if (fullNameEl.classList.contains('invalid')) {
fullNameEl.classList.remove('invalid');
}
fullNameErrors = 0;
}
fullNameSplit.map((name)=> {
if (name.length < 4 ) {
fullNameErrorEl.innerHTML = 'First and last name should be of minimum 4 letters';
fullNameEl.classList.add('invalid');
fullNameLengthErrors = 1;
} else {
if (fullNameEl.classList.contains('invalid')) {
fullNameEl.classList.remove('invalid');
}
fullNameLengthErrors = 0;
}
});
/* Checks whether Email is blank or not.
If yes, then adds invalid class to input element and sets fullName error to 1.
Also, checks whether entered email is in correct format.
*/
const onlyEmail = /^[a-zA-Z][a-zA-Z0-9\-\_\.]+@[a-zA-Z0-9]{2,}\.[a-zA-Z0-9]{2,}$/;
if (emailEl.value == '') {
emailEl.classList.add('invalid');
emailErrors = 1;
} else if (!onlyEmail.test(String(emailEl.value).toLowerCase())) {
emailEl.classList.add('invalid');
emailErrors = 1;
} else {
if (emailEl.classList.contains('invalid')) {
emailEl.classList.remove('invalid');
}
emailErrors = 0;
}
const stateNameEl = document.querySelector('.stateName');
const operatorNameEl = document.querySelector('.invalidOperator');
/* Checks whether mobile is blank or not.
If yes, then adds invalid class to input element and sets fullName error to 1.
Also, checks whether entered mobile number is not invalid.
*/
if (mobileNoEl.value == '') {
mobileNoEl.classList.add('invalid');
mobileNoErrors = 1;
} else if (operatorNameEl.classList.contains('active')) {
mobileNoEl.classList.add('invalid');
mobileNoErrors = 1;
} else {
if (mobileNoEl.classList.contains('invalid')) {
mobileNoEl.classList.remove('invalid');
}
mobileNoErrors = 0;
}
// Checks whether form values do not have errors and redirects user to OTP page.
if (fullNameErrors == 0 && mobileNoErrors == 0 && emailErrors == 0 && fullNameLengthErrors == 0) {
const mobileNo = document.querySelector('.mobile-no').value;
window.location.href = `./otp.html?firstName=${firstName}&mobileNo=${mobileNo}`;
} else {
alert('Please enter correct info and then click Submit again');
}
});
let mobileNoEl = document.querySelector('.mobile-no');
// Event listener for mobile number field to check if it has correct operator and state.
mobileNoEl.addEventListener('input', () => {
let numVal = mobileNoEl.value.replace(/\D/g, '');
// Object for states and UTs and their codes.
const stateDirectory = [
{
"name": "Andaman and Nicobar Islands",
"range": {
"start":000,
"end": 025
}
},
{
"name": "Andhra Pradesh",
"range": {
"start": 026,
"end": 027
}
},
{
"name": "Arunachal Pradesh",
"range": {
"start": 028,
"end": 051
}
},
{
"name": "Uttar Pradesh",
"range": {
"start": 052,
"end": 100
}
}, {
"name": "Himachal Pradesh",
"range": {
"start": 101,
"end": 125
}
}, {
"name": "MadhyaPradesh",
"range": {
"start": 126,
"end": 150
}
}, {
"name": "Kerla",
"range": {
"start": 151,
"end": 175
}
}, {
"name": "Gujrat",
"range": {
"start": 176,
"end":200
}
}, {
"name": "Maharashtra",
"range": {
"start": 201,
"end": 225
}
}, {
"name": "Tamilnadu",
"range": {
"start": 226,
"end": 250
}
}, {
"name": "Bihar",
"range": {
"start": 251,
"end": 300
}
}, {
"name": "Punjab",
"range": {
"start": 301,
"end": 325
}
}, {
"name": "Karnatka",
"range": {
"start": 326,
"end": 350
}
}, {
"name": "Tripura",
"range": {
"start": 351,
"end": 375
}
}, {
"name": "Assam",
"range": {
"start": 376,
"end": 400
}
}, {
"name": "Chhattisgarh",
"range": {
"start": 401,
"end": 425
}
}, {
"name": "Goa",
"range": {
"start": 426,
"end": 451
}
}, {
"name": "Haryana",
"range": {
"start": 452,
"end": 475
}
}, {
"name": "Jharkhand",
"range": {
"start": 476,
"end": 500
}
}, {
"name": "Manipur",
"range": {
"start": 501,
"end": 525
}
}, {
"name": "Meghalaya",
"range": {
"start": 526,
"end": 550
}
}, {
"name": "Mizoram",
"range": {
"start": 551,
"end": 575
}
}, {
"name": "Nagaland",
"range": {
"start": 576,
"end": 600
}
}, {
"name": "Odisha",
"range": {
"start": 601,
"end": 625
}
}, {
"name": "Rajasthan",
"range": {
"start": 626,
"end": 651
}
}, {
"name": "Sikkim",
"range": {
"start": 652,
"end": 675
}
}, {
"name": "Telangana",
"range": {
"start": 676,
"end": 700
}
}, {
"name": "Uttarakhand",
"range": {
"start": 701,
"end": 725
}
}, {
"name": "West Bengal",
"range": {
"start": 726,
"end": 751
}
}, {
"name": "Chandigarh",
"range": {
"start": 752,
"end": 775
}
}, {
"name": "Dadra and Nagar Haveli and Daman and Diu",
"range": {
"start": 776,
"end": 800
}
}, {
"name": "Delhi",
"range": {
"start": 801,
"end": 851
}
}, {
"name": "Jammu and Kashmir",
"range": {
"start": 852,
"end": 875
}
}, {
"name": "Ladakh",
"range": {
"start": 876,
"end": 900
}
}, {
"name": "Lakshadweep",
"range": {
"start": 901,
"end": 925
}
}, {
"name": "Puducherry",
"range": {
"start": 926,
"end": 999
}
},
]
const allOperators = document.querySelectorAll('.mobileOperator');
allOperators.forEach((operator) => {
if (operator.classList.contains('active')) {
operator.classList.remove('active');
}
});
// Matches to (999)-999-9999 format
var x = numVal.match(/(\d{0,3})(\d{0,3})(\d{0,4})/);
mobileNoEl.value = !x[2] ? x[1] : '(' + x[1] + ')-' + x[2] + (x[3] ? '-' + x[3] : '');
// Checks operator for the first 3 digits of mobile no.
if (numVal.length > 2) {
let mobileOperator = numVal.slice(0, 3);
mobileOperator = Number.parseInt(mobileOperator);
if (620 < mobileOperator && mobileOperator < 800) {
const reliance = document.querySelector('.mobileOperator.reliance');
reliance.classList.add('active');
} else if (800 < mobileOperator && mobileOperator < 921) {
const jio = document.querySelector('.mobileOperator.jio');
jio.classList.add('active');
} else if (920 < mobileOperator && mobileOperator < 1000) {
const voda = document.querySelector('.mobileOperator.voda');
voda.classList.add('active');
} else {
const invalidOperator = document.querySelector('.mobileOperator.invalidOperator');
invalidOperator.classList.add('active');
}
}
// Checks state for the middle 3 digits digits of mobile no.
const stateNameEl = document.querySelector('.stateName');
if (numVal.length === 6) {
let state = numVal.slice(3, 7);
state = Number.parseInt(state);
stateDirectory.forEach((states) => {
for (const [key, value] of Object.entries(states)) {
if (state >= value.start && state <= value.end) {
stateNameEl.innerHTML = states.name;
}
}
});
}
if (numVal.length < 6) {
stateNameEl.innerHTML = '';
}
});
</script>
</body>
</html>