rmcg.dev/projects/FrontendMentor/newbie/base-apparel-coming-soon/js/script.js

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2022-10-19 20:22:49 +02:00
"uses strict";
/*
* this is my "simple" regex for email addresses. It does not cover all the possibilities that are allowed
* for the local and domain parts. For a more "correct" / comprehensive regex, there is one at
* https://stackoverflow.com/questions/3844431/are-email-addresses-allowed-to-contain-non-alphanumeric-characters
*
* For local part you can use ASCII:
* Latin letters A - Z a - z
* digits 0 - 9
* special characters !#$%&'*+-/=?^_`{|}~
* dot ., that it is not first or last, and not in sequence
* space and "(),:;<>@[] characters are allowed with restrictions (they are only allowed inside a quoted string, a backslash or double-quote must be preceded by a backslash)
* Plus since 2012 you can use international characters above U+007F, encoded as UTF-8.
*
* Domain part is more restricted:
* Latin letters A - Z a - z
* digits 0 - 9
* hyphen -, that is not first or last, multiple hyphens in sequence are allowed.
*
* Recommended regex is: ^(([^<>()\[\]\.,;:\s@\"]+(\.[^<>()\[\]\.,;:\s@\"]+)*)|(\".+\"))@(([^<>()[\]\.,;:\s@\"]+\.)+[^<>()[\]\.,;:\s@\"]{2,})
*/
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const validEmailFormat = /^[A-Za-z0-9][\w+]*@[A-Za-z0-9]{3,}\.[A-Za-z]{2,}$/i;
const emailInput = document.getElementById("email-input");
const submitButton = document.getElementById("submit-button");
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const errorMessage = document.getElementById("errorMessage");
const errorIcon = document.getElementById("error-icon");
submitButton.addEventListener("click", checkEmailValidity, false);
emailInput.addEventListener("focus", inputFocused, false);
/**
* @param {[Event]} event
*/
function checkEmailValidity(event) {
if (validateEmailAddress() === false) {
event.preventDefault();
emailInput.classList.add("error-border");
errorMessage.classList.add("error-visible");
errorIcon.classList.add("error-visible");
} else {
emailInput.classList.remove("error-border");
errorMessage.classList.remove("error-visible");
}
}
/*
*/
function validateEmailAddress() {
const submittedEmailAddress = emailInput.value;
// test email is valid via regex
const isValidEmailAddress = validEmailFormat.test(submittedEmailAddress);
if (submittedEmailAddress.length === 0) {
return false;
} else if (!isValidEmailAddress) {
return false;
} else {
return true;
}
}
// When an input has focus I remove the error state,
function inputFocused(event) {
/**
* Just for VS Code intellisense
*
* @type {HTMLInputElement}
*/
const input = event.currentTarget;
if (input.classList.contains("error-border")) {
input.classList.remove("error-border");
errorMessage.classList.remove("error-visible");
errorIcon.classList.remove("error-visible");
}
}
function testRegex() {
console.log("Should all be false");
console.log(validEmailFormat.test("submittedEmailAddress"));
console.log(validEmailFormat.test("s@.NET"));
console.log(validEmailFormat.test("@"));
console.log(validEmailFormat.test("@."));
console.log(validEmailFormat.test("@.net"));
console.log(validEmailFormat.test("@tarasis.net"));
console.log(validEmailFormat.test("adsadasds@"));
console.log(validEmailFormat.test("__submittedEmailAddress"));
console.log(validEmailFormat.test("spam@tarasis.99"));
console.log(validEmailFormat.test("rob@.net"));
console.log(validEmailFormat.test("spam@tarasis"));
console.log(validEmailFormat.test("spam@tarasis.a"));
console.log(validEmailFormat.test("s@ta.net"));
console.log(validEmailFormat.test("_@tarasis.net"));
console.log(validEmailFormat.test("_3@tarasis.net"));
console.log("\n Should all be true");
console.log(validEmailFormat.test("spam@tarasis.net"));
console.log(validEmailFormat.test("rob@tad.io"));
console.log(validEmailFormat.test("s@tarasis.net"));
console.log(validEmailFormat.test("s@tarasis.net"));
console.log(validEmailFormat.test("s_@tarasis.net"));
console.log(validEmailFormat.test("s+blah@tarasis.net")); // this can be true, some servers use this for filtering
}
// testRegex();