By the end of this tutorial, you’ll have a working password generator that creates unique, strong passwords on demand.

Code walkthrough (javascript):
‹// Generate a random password between 12-20 characters long›
‹let passwordLength = Math.floor(Math.random() * (20 – 12 + 1)) + 12;›
‹function generatePassword(length)›
‹let characters = ‘ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789’;›
‹let password = ”;›
‹for (let i = 0; i ‹ length; i++)›
‹password += characters[Math.floor(Math.random() * characters.length)];›
‹return password;›
‹// Create an array of button elements to generate passwords›
‹let generateButton = document.createElement(‘button’);›
‹generateButton.textContent = ‘Generate Password’;›
‹document.body.appendChild(generateButton);›

What it looks like: Password length input is missing 😖 → Password length input is now required and valid 🎉

Try it yourself: Try increasing the complexity of your generated passwords by adding more character types.

This is part 33/80 of our free Javascript – Web development basic tutorial series — new lessons every week.
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