Hi Everyone!
In this post I will be showing you how to make a Random Password Generator with HTML, CSS, and Javascript. Follow me if you want more projects. Enjoy!
Let's start with the user interface made in HTML:
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="style.css">
<title>Random Password Generator</title>
</head>
<body>
<div class="container">
<h2 class="title">Password Generator</h2>
<div class="result">
<div class="result__title field-title">Generated Password</div>
<div class="result__info right">click to copy</div>
<div class="result__info left">copied</div>
<div class="result__viewbox" id="result">CLICK GENERATE</div>
<button id="copy-btn" style="--x: 0; --y: 0"><i class="far fa-copy"></i></button>
</div>
<div class="length range__slider" data-min="4" data-max="32">
<div class="length__title field-title" data-length='0'>length:</div>
<input id="slider" type="range" min="4" max="32" value="16" />
</div>
<div class="settings">
<span class="settings__title field-title">settings</span>
<div class="setting">
<input type="checkbox" id="uppercase" checked />
<label for="uppercase">Include Uppercase</label>
</div>
<div class="setting">
<input type="checkbox" id="lowercase" checked />
<label for="lowercase">Include Lowercase</label>
</div>
<div class="setting">
<input type="checkbox" id="number" checked />
<label for="number">Include Numbers</label>
</div>
<div class="setting">
<input type="checkbox" id="symbol" />
<label for="symbol">Include Symbols</label>
</div>
</div>
<button class="btn generate" id="generate">Generate Password</button>
</div>
<!-- linking javascript file -->
<script href="script.js"></script>
</body>
Next let's make it look better with CSS:
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
width: 100%;
height: 100vh;
background-image: linear-gradient(to top, #209cff 100%, #80ffdb 200%);
display: flex;
justify-content: center;
align-items: center;
}
button {
border: 0;
outline: 0;
}
.container {
margin: 40px 0;
width: 400px;
height: 600px;
padding: 10px 25px;
background: #0a0e31;
border-radius: 10px;
box-shadow: 0 0 5px rgba(0, 0, 0, 0.45), 0 4px 8px rgba(0, 0, 0, 0.35), 0 8px 12px rgba(0, 0, 0, 0.15);
font-family: "Montserrat";
}
.container h2.title {
font-size: 1.75rem;
margin: 10px -5px;
margin-bottom: 30px;
color: #fff;
}
.result {
position: relative;
width: 100%;
height: 65px;
overflow: hidden;
}
.result__info {
position: absolute;
bottom: 4px;
color: #fff;
font-size: 0.8rem;
transition: all 150ms ease-in-out;
transform: translateY(200%);
opacity: 0;
}
.result__info.right {
right: 8px;
}
.result__info.left {
left: 8px;
}
.result__viewbox {
width: 100%;
height: 100%;
background: rgba(255, 255, 255, 0.08);
border-radius: 8px;
color: #fff;
text-align: center;
line-height: 65px;
}
.result #copy-btn {
position: absolute;
top: var(--y);
left: var(--x);
width: 38px;
height: 38px;
background: #fff;
border-radius: 50%;
opacity: 0;
transform: translate(-50%, -50%) scale(0);
transition: all 350ms cubic-bezier(0.175, 0.885, 0.32, 1.275);
cursor: pointer;
z-index: 2;
}
.result #copy-btn:active {
box-shadow: 0 0 0 200px rgba(255, 255, 255, 0.08);
}
.result:hover #copy-btn {
opacity: 1;
transform: translate(-50%, -50%) scale(1.35);
}
.field-title {
position: absolute;
top: -10px;
left: 8px;
transform: translateY(-50%);
font-weight: 800;
color: rgba(255, 255, 255, 0.5);
text-transform: uppercase;
font-size: 0.65rem;
pointer-events: none;
user-select: none;
}
.options {
width: 100%;
height: auto;
margin: 50px 0;
}
.range__slider {
position: relative;
width: 100%;
height: calc(65px - 10px);
display: flex;
justify-content: center;
align-items: center;
background: rgba(255, 255, 255, 0.08);
border-radius: 8px;
margin: 30px 0;
}
.range__slider::before, .range__slider::after {
position: absolute;
color: #fff;
font-size: 0.9rem;
font-weight: bold;
}
.range__slider::before {
content: attr(data-min);
left: 10px;
}
.range__slider::after {
content: attr(data-max);
right: 10px;
}
.range__slider .length__title::after {
content: attr(data-length);
position: absolute;
right: -16px;
font-variant-numeric: tabular-nums;
color: #fff;
}
#slider {
-webkit-appearance: none;
width: calc(100% - (70px));
height: 2px;
border-radius: 5px;
background: rgba(255, 255, 255, 0.314);
outline: none;
padding: 0;
margin: 0;
cursor: pointer;
}
#slider::-webkit-slider-thumb {
-webkit-appearance: none;
width: 20px;
height: 20px;
border-radius: 50%;
background: white;
cursor: pointer;
transition: all 0.15s ease-in-out;
}
#slider::-webkit-slider-thumb:hover {
background: #d4d4d4;
transform: scale(1.2);
}
#slider::-moz-range-thumb {
width: 20px;
height: 20px;
border: 0;
border-radius: 50%;
background: white;
cursor: pointer;
transition: background 0.15s ease-in-out;
}
#slider::-moz-range-thumb:hover {
background: #d4d4d4;
}
.settings {
position: relative;
height: auto;
widows: 100%;
display: flex;
flex-direction: column;
}
.settings .setting {
position: relative;
width: 100%;
height: calc(65px - 10px);
background: rgba(255, 255, 255, 0.08);
border-radius: 8px;
display: flex;
align-items: center;
padding: 10px 25px;
color: #fff;
margin-bottom: 8px;
}
.settings .setting input {
opacity: 0;
position: absolute;
}
.settings .setting input + label {
user-select: none;
}
.settings .setting input + label::before, .settings .setting input + label::after {
content: "";
position: absolute;
transition: 150ms cubic-bezier(0.24, 0, 0.5, 1);
transform: translateY(-50%);
top: 50%;
right: 10px;
cursor: pointer;
}
.settings .setting input + label::before {
height: 30px;
width: 50px;
border-radius: 30px;
background: rgba(214, 214, 214, 0.434);
}
.settings .setting input + label::after {
height: 24px;
width: 24px;
border-radius: 60px;
right: 32px;
background: #fff;
}
.settings .setting input:checked + label:before {
background: #5d68e2;
transition: all 150ms cubic-bezier(0, 0, 0, 0.1);
}
.settings .setting input:checked + label:after {
right: 14px;
}
.settings .setting input:focus + label:before {
box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.75);
}
.settings .setting input:disabled + label:before, .settings .setting input:disabled + label:after {
cursor: not-allowed;
}
.settings .setting input:disabled + label:before {
background: #4f4f6a;
}
.settings .setting input:disabled + label:after {
background: #909090;
}
.btn.generate {
user-select: none;
position: relative;
width: 100%;
height: 50px;
margin: 10px 0;
border-radius: 8px;
color: #fff;
border: none;
background-image: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
letter-spacing: 1px;
font-weight: bold;
text-transform: uppercase;
cursor: pointer;
transition: all 150ms ease;
}
.btn.generate:active {
transform: translateY(-3%);
box-shadow: 0 4px 8px rgba(255, 255, 255, 0.08);
}
@keyframes octocat-wave {
0%, 100% {
transform: rotate(0);
}
20%, 60% {
transform: rotate(-20deg);
}
40%, 80% {
transform: rotate(10deg);
}
}
Now let's make it functional using Javascript:
// Clear the console on every refresh
console.clear();
// set the body to full height
// document.body.style.height = `${innerHeight}px`
// Range Slider Properties.
// Fill : The trailing color that you see when you drag the slider.
// background : Default Range Slider Background
const sliderProps = {
fill: "#0B1EDF",
background: "rgba(255, 255, 255, 0.214)",
};
// Selecting the Range Slider container which will effect the LENGTH property of the password.
const slider = document.querySelector(".range__slider");
// Text which will show the value of the range slider.
const sliderValue = document.querySelector(".length__title");
// Using Event Listener to apply the fill and also change the value of the text.
slider.querySelector("input").addEventListener("input", event => {
sliderValue.setAttribute("data-length", event.target.value);
applyFill(event.target);
});
// Selecting the range input and passing it in the applyFill func.
applyFill(slider.querySelector("input"));
// This function is responsible to create the trailing color and setting the fill.
function applyFill(slider) {
const percentage = (100 * (slider.value - slider.min)) / (slider.max - slider.min);
const bg = `linear-gradient(90deg, ${sliderProps.fill} ${percentage}%, ${sliderProps.background} ${percentage +
0.1}%)`;
slider.style.background = bg;
sliderValue.setAttribute("data-length", slider.value);
}
// Object of all the function names that we will use to create random letters of password
const randomFunc = {
lower: getRandomLower,
upper: getRandomUpper,
number: getRandomNumber,
symbol: getRandomSymbol,
};
// Random more secure value
function secureMathRandom() {
return window.crypto.getRandomValues(new Uint32Array(1))[0] / (Math.pow(2, 32) - 1);
}
// Generator Functions
// All the functions that are responsible to return a random value taht we will use to create password.
function getRandomLower() {
return String.fromCharCode(Math.floor(Math.random() * 26) + 97);
}
function getRandomUpper() {
return String.fromCharCode(Math.floor(Math.random() * 26) + 65);
}
function getRandomNumber() {
return String.fromCharCode(Math.floor(secureMathRandom() * 10) + 48);
}
function getRandomSymbol() {
const symbols = '~!@#$%^&*()_+{}":?><;.,';
return symbols[Math.floor(Math.random() * symbols.length)];
}
// Selecting all the DOM Elements that are necessary -->
// The Viewbox where the result will be shown
const resultEl = document.getElementById("result");
// The input slider, will use to change the length of the password
const lengthEl = document.getElementById("slider");
// Checkboxes representing the options that is responsible to create differnt type of password based on user
const uppercaseEl = document.getElementById("uppercase");
const lowercaseEl = document.getElementById("lowercase");
const numberEl = document.getElementById("number");
const symbolEl = document.getElementById("symbol");
// Button to generate the password
const generateBtn = document.getElementById("generate");
// Button to copy the text
const copyBtn = document.getElementById("copy-btn");
// Result viewbox container
const resultContainer = document.querySelector(".result");
// Text info showed after generate button is clicked
const copyInfo = document.querySelector(".result__info.right");
// Text appear after copy button is clicked
const copiedInfo = document.querySelector(".result__info.left");
// if this variable is trye only then the copyBtn will appear, i.e. when the user first click generate the copyBth will interact.
let generatedPassword = false;
// Update Css Props of the COPY button
// Getting the bounds of the result viewbox container
let resultContainerBound = {
left: resultContainer.getBoundingClientRect().left,
top: resultContainer.getBoundingClientRect().top,
};
// This will update the position of the copy button based on mouse Position
resultContainer.addEventListener("mousemove", e => {
resultContainerBound = {
left: resultContainer.getBoundingClientRect().left,
top: resultContainer.getBoundingClientRect().top,
};
if(generatedPassword){
copyBtn.style.opacity = '1';
copyBtn.style.pointerEvents = 'all';
copyBtn.style.setProperty("--x", `${e.x - resultContainerBound.left}px`);
copyBtn.style.setProperty("--y", `${e.y - resultContainerBound.top}px`);
}else{
copyBtn.style.opacity = '0';
copyBtn.style.pointerEvents = 'none';
}
});
window.addEventListener("resize", e => {
resultContainerBound = {
left: resultContainer.getBoundingClientRect().left,
top: resultContainer.getBoundingClientRect().top,
};
});
// Copy Password in clipboard
copyBtn.addEventListener("click", () => {
const textarea = document.createElement("textarea");
const password = resultEl.innerText;
if (!password || password == "CLICK GENERATE") {
return;
}
textarea.value = password;
document.body.appendChild(textarea);
textarea.select();
document.execCommand("copy");
textarea.remove();
copyInfo.style.transform = "translateY(200%)";
copyInfo.style.opacity = "0";
copiedInfo.style.transform = "translateY(0%)";
copiedInfo.style.opacity = "0.75";
});
// When Generate is clicked Password id generated.
generateBtn.addEventListener("click", () => {
const length = +lengthEl.value;
const hasLower = lowercaseEl.checked;
const hasUpper = uppercaseEl.checked;
const hasNumber = numberEl.checked;
const hasSymbol = symbolEl.checked;
generatedPassword = true;
resultEl.innerText = generatePassword(length, hasLower, hasUpper, hasNumber, hasSymbol);
copyInfo.style.transform = "translateY(0%)";
copyInfo.style.opacity = "0.75";
copiedInfo.style.transform = "translateY(200%)";
copiedInfo.style.opacity = "0";
});
// Function responsible to generate password and then returning it.
function generatePassword(length, lower, upper, number, symbol) {
let generatedPassword = "";
const typesCount = lower + upper + number + symbol;
const typesArr = [{ lower }, { upper }, { number }, { symbol }].filter(item => Object.values(item)[0]);
if (typesCount === 0) {
return "";
}
for (let i = 0; i < length; i++) {
typesArr.forEach(type => {
const funcName = Object.keys(type)[0];
generatedPassword += randomFunc[funcName]();
});
}
return generatedPassword.slice(0, length)
.split('').sort(() => Math.random() - 0.5)
.join('');
}
// function that handles the checkboxes state, so at least one needs to be selected. The last checkbox will be disabled.
function disableOnlyCheckbox(){
let totalChecked = [uppercaseEl, lowercaseEl, numberEl, symbolEl].filter(el => el.checked)
totalChecked.forEach(el => {
if(totalChecked.length == 1){
el.disabled = true;
}else{
el.disabled = false;
}
})
}
[uppercaseEl, lowercaseEl, numberEl, symbolEl].forEach(el => {
el.addEventListener('click', () => {
disableOnlyCheckbox()
})
})
That's It! You have now successfully created a Random Password Generator.
Top comments (3)
While the shuffle at least prevents the password from following a clear order of character types, by iterating over the types you still enforce a balance of character types, which in turn reduces randomness. Other than that, this is really neat - especially explicitly using window.crypto!
Nice!
I like the UI a lot 👌🏽
Thank You!