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html_cheetsheet.md

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<html>

Attributes:

  • lang="language" - Specifies language used in the document. Example lang="en-US".

<head>

Contains title, style, script, meta informations of a page.

<meta>

This tag can only go inside <head> tag. It contains meta data of an HTML page. <meta> tag has no ending tag.

Attributes:

  • charset="charset" - Describe the character encoding used in the document. Eg. UTF-8.
  • name="type" - Describe different information about the document. types for name can be
    • application-name
    • author
    • description
    • keyword - Keywords about the page. Useful for search engines.
    • viewport - Describe how the page will be shown in different devices. Very useful for portability.
  • http-equiv="type" - Provieds an HTTP header for the information of the content attribute. type can be:
    • refresh - To set refresh time of a page.
  • content="value" - Hold values for different types specified in name / http-equiv attribute.

Examples:

<!-- Define keywords for search engines -->
<meta name="keyword" content="HTML, Cheetsheet, Tags, Attributes">

<!-- Define description of a web page -->
<meta name="description" content="This page is about html cheatsheet">

<!--To state author of the page>
<meta name="author" content="Aagontuk">

<!-- To set character encoding -->
<meta charset="UTF-8">

<!-- To refresh page in every 15 sec -->
<meta http-equiv="refresh" content="15">

<!-- To make the page look good in every device -->
<meta name="viewport" content="width=device-width, initial-scale="1.0"">

<body>

Attributes:

  • alink="color" - color of a link when it is clicked.
  • link="color" - color of unvisited link.
  • vlink="color" - color of visited link.
  • background="image.png" - background image of a page if bgcolor not set.
  • bgcolor="color" - background color of a page if background image not set.
  • text="color" - color of the texts in the page.

<h1> to <h6>

Creates headlines in html document.

<hr>

Creates a horizontal line. Used for styling the document.

Attributes:

  • align - Specifies alignment.
  • size="pixel" - Specifies height in pixel. Eg. size="10"
  • width="x%" - Specifies width in %. Eg. width="50%"
  • noshed - Line will be of a solid color.

<p>

Creates a paragraph. Omit any line breaks(extra space, tab etc).

<pre>

Use fixed width font. Preserve line breaks.

Formatting Tags

  • <b> - Bold Text.
  • <i> - Italic Text.
  • <u> - Underline.
  • <strong> - Strong Text.
  • <em> - Emphasized Text.
  • <small> - Samll Text.
  • <sup> - Superscript.
  • <sub> - Subscript.
  • <mark> - Marked Text. Text with some background color.
  • <del> - Deleted Text. Striked.
  • <ins> - Inserted Text. Underlined.

Quotations

Quoting with quotation mark

Texts under <q> tag are placed under quotation mark.

Quoting using <blockquote>

<blockquote> is used to quote text from another source. Text under <blockquote> are indented.

<p>Here is some information about Themis:</p>
<blockquote cite="https://en.wikipedia.org/wiki/Themis">
Themis is an ancient Greek Titaness. She is described as
"[the Lady] of good counsel", and is the personification of
divine order, fairness, law, natural law and custom.
Her symbols are the Scales of Justice, tools used to remain balanced and pragmatic.
</blockquote>

<abbr> for Abbreviation

<abbr> is used for abbreviation. Show full form under cursor.

<p>
	Richard M. Stallman is the creator of the <abbr title="GNU is not Unix">GNU</abbr> system.
</p>

<address> for Contact Information

<address>
Luke Skywalker</br>
Naboo System</br>
</address>

<cite>

<cite> is used for mentioning the title of someone's work.

<p><cite>Star Wars</cite> directed by George Lucas</p>

HTML Color

Color can be specified in three way.

  1. Using color name. List of standard color names
<p style="color: red">This is a red text</p>
  1. Using RGB value.
<p style="color: rgb(0, 255, 0)">This is a green text</p>
  1. Using hexadecimal value.
<p style="color: #808080">This text is Ass</p>

CSS And HTML

CSS is used for decoration. Three ways to use CSS in HTML.

Inline CSS

Inline CSS is used to decorate each tag individualy using the style attribute.

<p style="font-family: garamond; color: red;">We want freedom in the web</p>

Internal CSS

Internal CSS is used to decorate the whole HTML document. <style> tag in used inside <head> to decribe CSS properties.

<!DOCTYPE html>

<html>
	<head>
		<title>HTML Document</title>

		<style>
			h3 {
				font-size: 50px;
				text-align: center;
			}

			p {
				font-family: garamond;
				color: blue;	
			}
		</style>
	</head>

	<body>
		<h3> Internal CSS Example </h3>
		<p> Internal CSS is decribed using <q>style<q> tag </p>
	</body>
</html>

To identify each tag separately id and class can be used.

HTML id Example
<!DOCTYPE html>

<html>
	<head>
    	<title>Internal CSS</title>
        
        <style>
        	h3 {
            	font-size: 30px;
                font-family: garamond;
            }
            
            #p01 {
            	color: red;
                font-size: 14px;
            }
            
            #p02 {
            	color: green;
                font-size: 20px;
            }
        </style>
    </head>
    
    <body>
    	<h3> Internal CSS Example using id </h3>
    	<p id="p01"> This is first paragraph </p>
        <p id="p02"> This is second paragraph </p>
    </body>
</html>
HTML class Example
<!DOCTYPE html>

<html>
	<head>
    	<title>Internal CSS</title>
        
        <style>
        	h3 {
            	font-size: 30px;
                font-family: garamond;
            }
            
            p.redText {
            	color: red;
                font-size: 14px;
            }
            
            p.greenText {
            	color: green;
                font-size: 20px;
            }
        </style>
    </head>
    
    <body>
    	<h3> Internal CSS Example using class </h3>
    	<p class="redText"> This text should be red </p>
        <p class="greenText"> This text should be green </p>
    </body>
</html>

Extarnal CSS

Separate CSS file is used. <link> tag is used to use the file in the document.

<head>
	<link rel="stylesheet" href="style.css">
</head>

<a> for Links

See W3Schools.

<img> for Images

See W3Schools. Some interesting features:

  • Floating property
  • <map> tag.

<table> for Tables

See W3Schools. Example:

<table style="width:100%">
	<tr>
    	<th>Title 1</th>
		<th>Title 2</th>
	</tr>
	<tr>
		<td> Cell 1</td>
		<td> Cell 2</td>
</table>

HTML Lists

See W3Schools. Interesting:

  • Description List.
  • Creating a Menu using list and CSS.

HTML Form

For creating HTML forms for getting data from user. Froms are created using <form></form> tag. Forms normaly contains:

  • <input> - Creating various types of inputs. Text, button, radio button, checbox etc.
  • <select> - For creating a drop down list.
  • <textarea> - For creating a large text field.
  • <label> - For creating label for various inputes.
  • <fieldset> - For specifying different input group. <legend> tag is used for labeling <fieldset>.

Important Attributes:

  • action="process_file_address" - Specifies the sever side sript which will process the submitted data.
  • method="get/post" - get for plain text submit. post for encrypted submit.
  • name="form_name" - Specifies the name of the form.
  • id="" - ID of the form.
  • autocomplete="on/off" - Turn on/off browser autocomplete feature.
  • enctype="" - Specifies how the data will be encrypted when send to the server.
  • accept="file_type" - Specifies comma separated file types that will be allowed for upload.
  • target="" - Specifies where submit response will be shown(New tab, own page etc).

<input> for various types of input area

In type attribute input types are specified. It can be:

  • type="text" - For simple text area.
  • type="password" - For taking passwords.
  • type="radio" - For radio buttons.
  • type="checkbox" - For checkbox.
  • type="file" - For uploading file.
  • type="button" - Creating a button. When the button is clicked it works based on onclick="scrpit_to_execute" attribute.
  • type="submit" - Creates a submit button for the form. When the submit button is clicked action is taken based on the action attribute of the form.
  • type="reset" - Creates a button for resetting the form.
  • type="image" - Defines an image as a submit button.
  • type="range" - Creates a range slider.
  • type="number" - Creates a number picker.
  • type="color" - Creates a color picker.
  • type="date" - Creates a date picker.
  • type="tel" - Telephone number form.

Important Attributes:

  • name="" - Specifies the name of an <input/> element.
  • value="" - Specifies the value of an <input> element. This can be used for setting default value.
  • placeholder="" - This text is shown faded in the text fields.
  • size="" - Maximum character input size for an input field.
  • max="" - Maximum accepted value for number, range, date type.
  • min="" - Minimum accepted value for number, range, date type.
  • step="" - Step size for slider or number picker.
  • pattern="" - Specifies a regular expression against which input is validated.
  • title="" - Text that is show when input dont pass regex validation.
  • autocomplete="on/off" - on/off browser autocomplete feature.
  • autofocus="on/off" - Will autofocus to this input field when the page loads.
  • checked - Make a checkbox / radio button as checked.
  • disabled - To disable an input field.
  • multiple - User can enter multiple values in an input element.
  • readonly - Specifies a input field as readonly. It can't be changed.
  • required - Specifies a field as required.
  • accept="file_type1, file_type2" - Accepted file types. Comma separated for multiple file type acceptence.
  • formaction="" - Specifies the script that will process this input field when the form submitted.
  • formmethod="get/post" - Which method to follow for form submission.
  • formenctype="" - Submitted data encryption type.
  • formtarget="" - Specifies where the response will be placed for this input(New tab, own page etc).

Example of an HTML form with all the tags and attributes

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
	<body>
		<h2 class="header"> Create an Account in Hell NOW! </h2>

		<form action="process.php" method="post" autocomplete="on">
			<fieldset>
				<legend>Basic Information</legend>
				Your Name:&nbsp;
				<input type="text" name="name" value="name" placeholder="Name" size="40" autofocus="on"/><br/>
				Your Gender:<br/>
				<input type="radio" name="gender" value="male"/>Male<br/>
				<input type="radio" name="gender" value="female"/>Female<br/>
				<input type="radio" name="gender" value="other" checked="checked"/>Other<br/>
				Married?<br/>
				<input type="checkbox" name="married" value="no" checked="checked"/>No<br/>
				<input type="checkbox" name="married" value="yes"/>Yes</br>
			</fieldset>

			<fieldset>
				<legend>Insanity Check</legend>
				Pick <span class="color">Red</span> color:&nbsp;
				<input type="color" name="color" value="blue"><br/>
				What is the value of &Pi;:&nbsp;
				<input type="number" name="pi" value="3" min="1" max="9" step="2"/><br/>
				Can you slide for no reason?&nbsp;
				<input type="range" name="slide" value="50" min="0" max="100" step="2"/>
			</fieldset>

			<fieldset>
				<legend>Create Username</legend>
				Username:&nbsp;
				<input type="text" name="uname" placeholder="username" pattern="[A-Za-z]{6}" label="Only letters and upto six characters" required/><br/>
				Password:&nbsp;
				<input type="password" name="pass" pattern="[A-Za-z0-9]{6}" label="Only letters and numbers upto 6 characters" required/><br/>
				Upload Image:<br/>
				<input type="file" name="image"/>
			</fieldset>

			Want to meet god?<br/>
			<label name="meetYes">Yes</label>
			<input type="radio" name="god" value="yes" id="meetYes" disabled="disabled"/><br/>
			<label name="meetNo">No</label>
			<input type="radio" name="god" value="no" id="meetNo" disabled="disabled"/><br/>
			<input type="submit" value="Register!"/>
			<input type="reset"/>
		</form>
	</body>
</html>