Simple Random Password Generator using JavaScript

Simple Random Password Generator using JavaScript

JavaScript Random Password Generator will help you to easily create random passwords. Although this type of project is not used much. 

However, this type of Random Password Generator JavaScript will help you to know more about JavaScript. This is a Random Password Generator so the password cannot be customized here. 


Before that, I shared a tutorial on Advanced Password Generator. If you want to customize the password then you can watch that tutorial.

Random Password Generator JavaScript

Here you can create a password with a single click. If you are a beginner and want to create a password generator using just a little bit of JavaScript then this random password generator tutorial will help you completely.

Below is a demo section that will help you get a preview of this project. However, I have shared all the step-by-step tutorials here.

See the Pen Untitled by Foolish Developer (@foolishdevweb) on CodePen.


As you can see above, a box has been created at the top of the webpage. At the top of the box is a display that is made using input. 

Then there is a button. Clicking on that button will generate a password. All design work is done by HTML and CSS. JavaScript Help to activate this JavaScript Password Generator.

How to Generate Random Password in Javascript

Hope you enjoyed the above preview and would like to create this Random Password Generator using JavaScript. 

Of course, this requires you to have a basic idea about JavaScript. Below the article is a button to download the code that you can use.

1. Basic structure of Password Generator

Using the following HTML and CSS codes, we first created a box in which all the information can be found.


<div class="container">
 
</div>

I have designed the HTML page using the following CSS code. The blue color is used in the background of the page here.


* {
margin: 0;
padding: 0;
border: none;
outline: none;
box-sizing: border-box;
-webkit-tap-highlight-color: transparent;
}

html,
body {
height: 100%;
}

body {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
font-family: "Open Sans", sans-serif;
background: #1767f6;
}

Now the basic design of the box has been done. White color and max-width: 26rem is used in the background of the box.


.container{
background: white;
max-width: 26rem;
padding: 16px;
}


Basic structure of Password Generator

2. Create a display using input

Now created a display using HTML's input function. Calculated passwords can be found in this display.


<input type="text" placeholder=" " disabled>


input {
font-family: "Open Sans", sans-serif;
font-size: 19px;
color: #0fbb2c;
background: transparent;
padding: 1rem 1.2rem;
min-width: 24rem;
border-radius: 0.2rem;
border: 3px solid #085cdb;
transition: border-color 0.2s;
}

Create a display using input

3. Button to generate password

Now I have created a button that will generate the password. For this button, I have used the button function of Simple's HTML.


<button> Generate Password </button>


button {
font-family: inherit;
font-weight: inherit;
font-size: 20px;
user-select: none;
margin-top: 1.2rem;
padding: 1rem 1.2rem;
min-width: 24rem;
border-radius: 0.2rem;
background: #194667;
color: #ffffff;
transition: opacity 0.2s;
}

button:hover {
cursor: pointer;
opacity: 0.6;
}

Button to generate password

4. Activate Password Generator with JavaScript

Now you need to use some JavaScript to activate this Random Password Generator. First, the constant of some HTML functions is determined. 

Here the constant of the display and the button is determined. Because I can't use any HTML element directly in JavaScript. So we need to determine a global constant.


const input = document.querySelector("input");
const button = document.querySelector("button");

Now I have implemented it using some JavaScript. I have given the necessary explanation for each line. Hopefully, the explanations will help you understand the JavaScript lines below.


function GeneratePassword(length = 16) {

  //These characters are used to generate the password @type {String}

  const charset =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789@#$";

  let password = "";

   //Running the for loop x times

   //x = length

   //using ++ in front of i to increase the i value before the block gets executed

   //the first character would be always a (0)

  for (let i = 0; i < length; ++i) {
 
     //Generating a random number
     //between 0 and the charset length to get a random character from the whole string @type {Number}

    let at = Math.floor(Math.random() * (charset.length + 1));

    //Getting a random char from the charset and append it to the password variable

    password += charset.charAt(at);
  }

  //returning the password

  return password;
}

//Generate a random password on button click and set it as value of the input

button.addEventListener("click", () => {
  input.value = GeneratePassword(16);
});


Password Generator with JavaScript

Random Password Generator (Source Code)

If you only want the source code then there is no reason to worry. Below I have given a box containing all the source code to create this JavaScript Random Password Generator. 

You must first create an HTML file. Then add those codes to your HTML file. Here all the code is assembled together. 

As a result, you do not have to create a separate file. Just add these codes by creating an HTML file.

See the Pen Untitled by Foolish Developer (@foolishdevweb) on CodePen.

But if you only want to download the code, you can use the download button below. Clicking on that button will download the code of the Random Password Generator directly. Please comment on how you like this Password Generator.






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