Playground HTML Data Types DOM JavaScript Input Output Debugging

Frontend Development

An introduction to HTML, CSS, and JavaScript.

• 2 min read

Javascript

How does HTML work?

Similar function to Markdown, syntax defines how stuff should be displayed

  • HTML is based on beginning and closing tags <tagname>content</tagname>
    • Note the “/” on the ending or closing tag of the pair

Compare markdown to html below

This below example shows comparison of a heading and paragraph. Click on links to see many more HTML examples.

%%markdown

### Markdown: This is a Heading

This is a paragraph

Markdown: This is a Heading

This is a paragraph

%%html

<h3>HTML: This is a Heading</h3>
<p>This is a paragraph.</p>

HTML: This is a Heading

This is a paragraph.

Attributes

  • Learn about attributes
  • Tags can have additional info in the form of attributes
  • Attributes usually come in name/value pairs like: name=”value”
<tagname attribute_name="attribute_value" another_attribute="another_value">inner html text</tagname>
  • href example with attribute for web link and inner html to describe link
<a href="https://www.w3schools.com/html/default.asp">Visit W3Schools HTML Page</a>

Sample Markdown vs HTML Tags

Image Tag - Markdown

![describe image](link to image)

Image Tag - HTML

<!-- no content so no end tag, width/height is optional (in pixels) -->
<img alt="describe image" src="link to image" width="100" height="200">

Link Tag - Markdown

[link text](link)

Link Tag - HTML

<a href="link">link text</a>

Bolded Text - Markdown

**Bolded Text**

Bolded Text - HTML

<strong>Bolded Text</strong>

Italic Text - Markdown

*Italic Text*

Italic Text - HTML

<i>Italic Text</i>

More tags (not really in markdown)

P tag (just represeants a paragraph/normal text)

<p>This is a paragraph</p>

Button

<button>some button text</button>

Div (groups together related content)

<!-- first information -->
<div>
    <!-- notice how tags can be put INSIDE eachother -->
    <p>This is the first paragarph of section 1</p>
    <p>This is the second paragraph of section 1</p>
</div>

<!-- second information -->
<div>
    <!-- notice how tags can be put INSIDE eachother -->
    <p>This is the first paragarph of section 2</p>
    <p>This is the second paragraph of section 2</p>
</div>

Resources

  • https://www.w3schools.com/html/default.asp

HTML Hacks

  • Below is a wireframe for an HTML element you will create. A wireframe is a rough visual representation of HTML elements on a page and isn’t necessarily to scale or have the exact styling that the final HTML will have.
  • Using the syntax above, try to create an HTML cell that corresponds to the below wireframe.
  • The “a tags” contain links to other content
  • Pick any topic but try to match the plan


%%html

<!-- put your HTML code in this cell, Make sure to press the Run button to see your results below -->