freeCodeCamp/curriculum/challenges/english/01-responsive-web-design/css-piano/part-001.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
612e6afc009b450a437940a1	Part 1	0	part-1

--description--

Begin with the basic HTML structure. Add a DOCTYPE declaration and html, head, body, and title elements. Set the title to Responsive Web Design Piano.

--hints--

Your code should contain the DOCTYPE reference.

assert(code.match(/<!DOCTYPE/gi));

You should include a space after the DOCTYPE reference.

assert(code.match(/<!DOCTYPE\s+/gi));

You should define the document type to be html.

assert(code.match(/<!DOCTYPE\s+html/gi));

You should close the DOCTYPE declaration with a > after the type.

assert(code.match(/<!DOCTYPE\s+html\s*>/gi));

Your html element should have an opening tag.

assert(code.match(/<html\s*>/gi));

Your html element should have a closing tag.

assert(code.match(/<\/html\s*>/));

Your html element should be below the DOCTYPE declaration.

assert(code.match(/(?<!<html\s*>)<!DOCTYPE\s+html\s*>/gi));

You should have an opening head tag.

assert(code.match(/<head\s*>/i));

You should have a closing head tag.

assert(code.match(/<\/head\s*>/i));

You should have an opening body tag.

assert(code.match(/<body\s*>/i));

You should have a closing body tag.

assert(code.match(/<\/body\s*>/i));

The head and body elements should be siblings.

assert(document.querySelector('head')?.nextElementSibling?.localName === 'body');

The head element should be within the html element.

assert([...document.querySelector('html')?.children].some(x => x?.localName === 'head'));

The body element should be within the html element.

assert([...document.querySelector('html')?.children].some(x => x?.localName === 'body'));

Your code should have a title element.

const title = document.querySelector('title');
assert.exists(title);

Your project should have a title of Responsive Web Design Piano.

const title = document.querySelector('title');
assert.equal(title?.text?.trim()?.toLowerCase(), 'responsive web design piano')

Remember, the casing and spelling matter for the title.

const title = document.querySelector('title');
assert.equal(title?.text?.trim(), 'Responsive Web Design Piano');

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