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Questions and Answers
What is the purpose of the REQUIRED ATTRIBUTE in form elements?
Which boolean attribute can be used to prevent user interaction with an input field?
What is the correct way to use an HTML entity for a non-breaking space?
What do the MINLENGTH and MAXLENGTH attributes control?
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What HTML element is used in conjunction with the DETAILS ELEMENT to provide a heading?
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Which of the following is NOT a common HTML entity?
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What character does the HTML entity < represent?
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What is the function of HTML comments?
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What is the primary purpose of the FORM ELEMENT in web development?
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Which HTTP method is used to create new resources on a server?
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What does the 'action' attribute in a form element specify?
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If you want to provide a hint inside the input box for users, which attribute would you use?
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Which HTTP method would you use to partially update existing data on a server?
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What will the 'value' attribute do when used in an input element?
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Which of the following input types would be used to capture a phone number?
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What will happen if a user starts typing in an input field with a placeholder attribute?
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Study Notes
Forms
- Forms are used to collect user input, that can be used to store information, or authenticate users
- The FORM ELEMENT is a container for all input elements
- The action attribute specifies the URL where the data is sent
- The method attribute determines the HTTP method to use (POST or GET)
HTTP Methods
- Describe the action the server should perform with the submitted data
- GET retrieves data from the server
- POST Creates new resources (e.g., user signup)
- PUT Updates existing data on the server, replacing current content with new data
- PATCH Partially updates existing data on the server, modifying only specified fields
- DELETE Removes data from the server
- OPTIONS Asks the server which HTTP methods are supported for a specific resource
Input Element
- The INPUT ELEMENT is the core building block for user input
- The type attribute determines the type of data captured (e.g. text, password, email)
- text Displays a text input field
- password Displays a password input field (masked)
- number Displays a number input field
- url Displays a URL input field
- tel Displays a phone number input field
- date Displays a date input field
- datetime-local Displays a date and time input field
- month Displays a month input field
- week Displays a week input field
- color Displays a color picker
- file Displays a file upload input field
- reset Displays a button to reset the form
- submit Displays a button to submit the form
- The value attribute sets a default value for the field, which is displayed when the website loads
- The placeholder attribute shows a hint or example inside the input box, which disappears when the user starts typing
- The disabled attribute prevents users from interacting with the input field
Validating Input Elements
- The required attribute makes a field mandatory, preventing submission unless the field is filled out
- The minlength and maxlength attributes set limits on the number of characters that can be entered in a text field
Details Element
- The details element provides expandable sections with additional information
- The summary element is used along with details to specify a visible heading for the details
HTML Entities
- Used to display special characters
- Formatted using &entity_name;
- Commonly used entities:
- Non-breaking space
- < Less than sign
- & Ampersand
- " Double quotation mark
- ' Single quotation mark
- £ Pound
- € Euro
- © Copyright
- ® Trademark
HTML Comments
-
Comment tags are enclosed within
<!-- -->
- Allow you to insert notes and explanations into your code
- Comments are not displayed in browsers
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Description
This quiz covers essential concepts about forms and HTTP methods used in web development. Learn the purpose of form elements, various input types, and how different HTTP methods interact with server data. Test your knowledge on how to effectively use forms and understand server communication.