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freeCodeCamp/curriculum/challenges/english/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98c9.md
Naomi Carrigan 16e7cdedb1 feat: migrate filenames to IDs (#45146) 
* feat: migrate filenames to IDs

* feat: migrate balance sheet file names

* revert: no id name for cert projects

* fix: i swear i know what i'm doing
2022-03-02 09:06:00 -06:00

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id, title, challengeType, dashedName
id title challengeType dashedName
5d822fd413a79914d39e98c9 Step 1 0 step-1

--description--

Welcome to the CSS Variables Skyline project! Start by adding the !DOCTYPE html declaration at the top of the document so the browser knows what type of document it's reading.

--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(/html/gi));

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

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

Your DOCTYPE declaration should be at the beginning of your HTML.

assert(__helpers.removeHtmlComments(code).match(/^\s*<!DOCTYPE\s+html\s*>/i));

--seed--

--seed-contents--

--fcc-editable-region--

--fcc-editable-region--