Mastering HTML Forms and Input Elements

From the study guide

HTML Forms (Part 2) - Revision Sheet

1. 📌 Essentials

  • <form> tag encloses user input elements; controls data submission.
  • action attribute specifies server script URL; method defines data transmission (POST or GET).
  • Data is URL-encoded; unsafe characters replaced with %xx; spaces as + or %20.
  • <input type="submit"> triggers form submission; <input type="reset"> clears inputs.
  • HTML5 introduces diverse input types: color, date, email, file, hidden, number, password, radio, range, search, tel, time, url, week.
  • Date/time inputs require RFC3339 formats: YYYY-MM-DD, YYYY-MM-DDTHH:MM:SS, etc.
  • <textarea> supports multi-line input; size via rows, cols; maxlength limits characters.
  • <select> creates dropdowns with <option>; supports multiple and size.
  • Validation attributes: required, autofocus, formnovalidate, autocomplete, datalist.
  • Group radio buttons with the same name for single selection.

2. 🧩 Key Structures & Components

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Practice quiz preview

1. What is the primary purpose of the `<form>` tag in HTML?

2. What is the correct format for a date input (`<input type='date'>`) in HTML5?

3. Which attribute of the `<input>` element specifies the URL of the server-side script that processes the form data?

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Flashcard preview

HTML form — purpose?

Collects and sends user data to server

`method` attribute — options?

POST or GET

Date input — format?

YYYY-MM-DD (RFC3339)

`<form>` — role?

Container for inputs, handles submission

`action` attribute — purpose?

Specifies server script URL

`method` — options?

POST or GET

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