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FULL CURRICULUM
Six tracks, one progress.
Only available exercises count toward progress. Planned tracks are not treated as overdue work.
Available
HTML
120 exercises · 12 modules in the curriculum
—120 available now
Open track Available
CSS
100 exercises · 10 modules in the curriculum
—100 available now
Open track Available
JavaScript
100 exercises · 10 modules in the curriculum
—50 available now
Open track Planned
PHP
100 exercises · 10 modules in the curriculum
Not published yet
Planned
Python
100 exercises · 10 modules in the curriculum
Not published yet
Planned
Projects
100 exercises · 10 modules in the curriculum
Not published yet
HTML + CSS + JavaScript
270 exercises in 27 available modules
You can open any public lesson. Permanent progress appears after sign-in.
HTML 01HTML foundations
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HTML foundations
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- 01HTML document structureNot startedLast—Best—Failed0Hints0Open
- 02Headings and paragraphsNot startedLast—Best—Failed0Hints0Open
- 03Clear linksNot startedLast—Best—Failed0Hints0Open
- 04Accessible imagesNot startedLast—Best—Failed0Hints0Open
- 05Ordered and unordered listsNot startedLast—Best—Failed0Hints0Open
- 06Semantic page structureNot startedLast—Best—Failed0Hints0Open
- 07Article and sectionNot startedLast—Best—Failed0Hints0Open
- 08A table for dataNot startedLast—Best—Failed0Hints0Open
- 09Accessible formNot startedLast—Best—Failed0Hints0Open
- 10Repair a page structureNot startedLast—Best—Failed0Hints0Open
HTML 02Text and meaning
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Text and meaning
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- 11Build: importance with strongNot startedLast—Best—Failed0Hints0Open
- 12Repair: importance with strongNot startedLast—Best—Failed0Hints0Open
- 13Build: stress emphasis with emNot startedLast—Best—Failed0Hints0Open
- 14Repair: stress emphasis with emNot startedLast—Best—Failed0Hints0Open
- 15Build: highlighting with markNot startedLast—Best—Failed0Hints0Open
- 16Repair: highlighting with markNot startedLast—Best—Failed0Hints0Open
- 17Build: side comments with smallNot startedLast—Best—Failed0Hints0Open
- 18Repair: side comments with smallNot startedLast—Best—Failed0Hints0Open
- 19Build: an explained abbreviationNot startedLast—Best—Failed0Hints0Open
- 20Repair: an explained abbreviationNot startedLast—Best—Failed0Hints0Open
HTML 03Links and actions
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Links and actions
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- 21Build: an in-page section linkNot startedLast—Best—Failed0Hints0Open
- 22Repair: an in-page section linkNot startedLast—Best—Failed0Hints0Open
- 23Build: a descriptive external linkNot startedLast—Best—Failed0Hints0Open
- 24Repair: a descriptive external linkNot startedLast—Best—Failed0Hints0Open
- 25Build: an email linkNot startedLast—Best—Failed0Hints0Open
- 26Repair: an email linkNot startedLast—Best—Failed0Hints0Open
- 27Build: a telephone linkNot startedLast—Best—Failed0Hints0Open
- 28Repair: a telephone linkNot startedLast—Best—Failed0Hints0Open
- 29Build: a download linkNot startedLast—Best—Failed0Hints0Open
- 30Repair: a download linkNot startedLast—Best—Failed0Hints0Open
HTML 04Images and media
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Images and media
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- 31Build: an image with a captionNot startedLast—Best—Failed0Hints0Open
- 32Repair: an image with a captionNot startedLast—Best—Failed0Hints0Open
- 33Build: explicit image dimensionsNot startedLast—Best—Failed0Hints0Open
- 34Repair: explicit image dimensionsNot startedLast—Best—Failed0Hints0Open
- 35Build: a responsive pictureNot startedLast—Best—Failed0Hints0Open
- 36Repair: a responsive pictureNot startedLast—Best—Failed0Hints0Open
- 37Build: controllable audioNot startedLast—Best—Failed0Hints0Open
- 38Repair: controllable audioNot startedLast—Best—Failed0Hints0Open
- 39Build: video with captionsNot startedLast—Best—Failed0Hints0Open
- 40Repair: video with captionsNot startedLast—Best—Failed0Hints0Open
HTML 05Page structure
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Page structure
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- 41Build: a header with navigationNot startedLast—Best—Failed0Hints0Open
- 42Repair: a header with navigationNot startedLast—Best—Failed0Hints0Open
- 43Build: one main content regionNot startedLast—Best—Failed0Hints0Open
- 44Repair: one main content regionNot startedLast—Best—Failed0Hints0Open
- 45Build: an article with its own headerNot startedLast—Best—Failed0Hints0Open
- 46Repair: an article with its own headerNot startedLast—Best—Failed0Hints0Open
- 47Build: a titled sectionNot startedLast—Best—Failed0Hints0Open
- 48Repair: a titled sectionNot startedLast—Best—Failed0Hints0Open
- 49Build: secondary content with asideNot startedLast—Best—Failed0Hints0Open
- 50Repair: secondary content with asideNot startedLast—Best—Failed0Hints0Open
HTML 06Lists and data
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Lists and data
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- 51Build: a complete unordered listNot startedLast—Best—Failed0Hints0Open
- 52Repair: a complete unordered listNot startedLast—Best—Failed0Hints0Open
- 53Build: a numbered ordered listNot startedLast—Best—Failed0Hints0Open
- 54Repair: a numbered ordered listNot startedLast—Best—Failed0Hints0Open
- 55Build: a description listNot startedLast—Best—Failed0Hints0Open
- 56Repair: a description listNot startedLast—Best—Failed0Hints0Open
- 57Build: a table with column headersNot startedLast—Best—Failed0Hints0Open
- 58Repair: a table with column headersNot startedLast—Best—Failed0Hints0Open
- 59Build: a table with row headersNot startedLast—Best—Failed0Hints0Open
- 60Repair: a table with row headersNot startedLast—Best—Failed0Hints0Open
HTML 07Form essentials
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Form essentials
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- 61Build: a labelled text fieldNot startedLast—Best—Failed0Hints0Open
- 62Repair: a labelled text fieldNot startedLast—Best—Failed0Hints0Open
- 63Build: a complete email fieldNot startedLast—Best—Failed0Hints0Open
- 64Repair: a complete email fieldNot startedLast—Best—Failed0Hints0Open
- 65Build: a number with limitsNot startedLast—Best—Failed0Hints0Open
- 66Repair: a number with limitsNot startedLast—Best—Failed0Hints0Open
- 67Build: a message textareaNot startedLast—Best—Failed0Hints0Open
- 68Repair: a message textareaNot startedLast—Best—Failed0Hints0Open
- 69Build: a select menuNot startedLast—Best—Failed0Hints0Open
- 70Repair: a select menuNot startedLast—Best—Failed0Hints0Open
HTML 08Advanced forms
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Advanced forms
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- 71Build: grouped radio optionsNot startedLast—Best—Failed0Hints0Open
- 72Repair: grouped radio optionsNot startedLast—Best—Failed0Hints0Open
- 73Build: a consent checkboxNot startedLast—Best—Failed0Hints0Open
- 74Repair: a consent checkboxNot startedLast—Best—Failed0Hints0Open
- 75Build: a date within a rangeNot startedLast—Best—Failed0Hints0Open
- 76Repair: a date within a rangeNot startedLast—Best—Failed0Hints0Open
- 77Build: suggestions with datalistNot startedLast—Best—Failed0Hints0Open
- 78Repair: suggestions with datalistNot startedLast—Best—Failed0Hints0Open
- 79Build: a complete grouped formNot startedLast—Best—Failed0Hints0Open
- 80Repair: a complete grouped formNot startedLast—Best—Failed0Hints0Open
HTML 09Document and metadata
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Document and metadata
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- 81Build: charset and viewportNot startedLast—Best—Failed0Hints0Open
- 82Repair: charset and viewportNot startedLast—Best—Failed0Hints0Open
- 83Build: document title and descriptionNot startedLast—Best—Failed0Hints0Open
- 84Repair: document title and descriptionNot startedLast—Best—Failed0Hints0Open
- 85Build: document language and directionNot startedLast—Best—Failed0Hints0Open
- 86Repair: document language and directionNot startedLast—Best—Failed0Hints0Open
- 87Build: useful global attributesNot startedLast—Best—Failed0Hints0Open
- 88Repair: useful global attributesNot startedLast—Best—Failed0Hints0Open
- 89Build: disclosure detailsNot startedLast—Best—Failed0Hints0Open
- 90Repair: disclosure detailsNot startedLast—Best—Failed0Hints0Open
HTML 10Integration and debugging
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Integration and debugging
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- 91Build: a page with landmarksNot startedLast—Best—Failed0Hints0Open
- 92Repair: a page with landmarksNot startedLast—Best—Failed0Hints0Open
- 93Build: an article with a publication dateNot startedLast—Best—Failed0Hints0Open
- 94Repair: an article with a publication dateNot startedLast—Best—Failed0Hints0Open
- 95Build: a semantic service cardNot startedLast—Best—Failed0Hints0Open
- 96Repair: a semantic service cardNot startedLast—Best—Failed0Hints0Open
- 97Build: an accessible pricing tableNot startedLast—Best—Failed0Hints0Open
- 98Repair: an accessible pricing tableNot startedLast—Best—Failed0Hints0Open
- 99Build: a complete contact sectionNot startedLast—Best—Failed0Hints0Open
- 100Repair: a complete contact sectionNot startedLast—Best—Failed0Hints0Open
HTML 11HTML quality
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HTML quality
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- 101Build: separate interactive controlsNot startedLast—Best—Failed0Hints0Open
- 102Repair: separate interactive controlsNot startedLast—Best—Failed0Hints0Open
- 103Build: unique document IDsNot startedLast—Best—Failed0Hints0Open
- 104Repair: unique document IDsNot startedLast—Best—Failed0Hints0Open
- 105Build: a complete heading hierarchyNot startedLast—Best—Failed0Hints0Open
- 106Repair: a complete heading hierarchyNot startedLast—Best—Failed0Hints0Open
- 107Build: an efficiently loaded imageNot startedLast—Best—Failed0Hints0Open
- 108Repair: an efficiently loaded imageNot startedLast—Best—Failed0Hints0Open
- 109Build: a described and restricted iframeNot startedLast—Best—Failed0Hints0Open
- 110Repair: a described and restricted iframeNot startedLast—Best—Failed0Hints0Open
HTML 12Technical text and citations
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Technical text and citations
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- 111Build: a code blockNot startedLast—Best—Failed0Hints0Open
- 112Repair: a code blockNot startedLast—Best—Failed0Hints0Open
- 113Build: technical commands and outputNot startedLast—Best—Failed0Hints0Open
- 114Repair: technical commands and outputNot startedLast—Best—Failed0Hints0Open
- 115Build: a quotation with a sourceNot startedLast—Best—Failed0Hints0Open
- 116Repair: a quotation with a sourceNot startedLast—Best—Failed0Hints0Open
- 117Build: contact details with addressNot startedLast—Best—Failed0Hints0Open
- 118Repair: contact details with addressNot startedLast—Best—Failed0Hints0Open
- 119Build: isolated bidirectional textNot startedLast—Best—Failed0Hints0Open
- 120Repair: isolated bidirectional textNot startedLast—Best—Failed0Hints0Open
CSS 01Syntax, connection and selectors
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Syntax, connection and selectors
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- 01Your first CSS ruleNot startedLast—Best—Failed0Hints0Open
- 02Connect a CSS fileNot startedLast—Best—Failed0Hints0Open
- 03Use an internal stylesheetNot startedLast—Best—Failed0Hints0Open
- 04Type selectorNot startedLast—Best—Failed0Hints0Open
- 05Class selectorNot startedLast—Best—Failed0Hints0Open
- 06ID selectorNot startedLast—Best—Failed0Hints0Open
- 07Group selectorsNot startedLast—Best—Failed0Hints0Open
- 08Descendant selectorNot startedLast—Best—Failed0Hints0Open
- 09Child combinatorNot startedLast—Best—Failed0Hints0Open
- 10Repair a CSS ruleNot startedLast—Best—Failed0Hints0Open
CSS 02Cascade, inheritance and specificity
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Cascade, inheritance and specificity
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- 11Rule orderNot startedLast—Best—Failed0Hints0Open
- 12Automatic inheritanceNot startedLast—Best—Failed0Hints0Open
- 13Explicit inheritanceNot startedLast—Best—Failed0Hints0Open
- 14Return to the initial valueNot startedLast—Best—Failed0Hints0Open
- 15Erase a declaration with unsetNot startedLast—Best—Failed0Hints0Open
- 16A class beats a type selectorNot startedLast—Best—Failed0Hints0Open
- 17An ID beats a classNot startedLast—Best—Failed0Hints0Open
- 18A more specific compound selectorNot startedLast—Best—Failed0Hints0Open
- 19Element-attached styleNot startedLast—Best—Failed0Hints0Open
- 20Use !important deliberatelyNot startedLast—Best—Failed0Hints0Open
CSS 03Colours, units, backgrounds and contrast
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Colours, units, backgrounds and contrast
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- 21Write a hexadecimal colourNot startedLast—Best—Failed0Hints0Open
- 22Build a colour with rgb()Not startedLast—Best—Failed0Hints0Open
- 23Describe a colour with hsl()Not startedLast—Best—Failed0Hints0Open
- 24Add transparency with alphaNot startedLast—Best—Failed0Hints0Open
- 25Size text with remNot startedLast—Best—Failed0Hints0Open
- 26Create spacing with emNot startedLast—Best—Failed0Hints0Open
- 27Use a percentage widthNot startedLast—Best—Failed0Hints0Open
- 28Relate a section to the viewportNot startedLast—Best—Failed0Hints0Open
- 29Combine background and borderNot startedLast—Best—Failed0Hints0Open
- 30Build readable contrastNot startedLast—Best—Failed0Hints0Open
CSS 04Typography, text and spacing
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Typography, text and spacing
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- 31Build a font family listNot startedLast—Best—Failed0Hints0Open
- 32Size a heading with remNot startedLast—Best—Failed0Hints0Open
- 33Emphasise text with weightNot startedLast—Best—Failed0Hints0Open
- 34Style a quotation with italicNot startedLast—Best—Failed0Hints0Open
- 35Open up a paragraph with line-heightNot startedLast—Best—Failed0Hints0Open
- 36Centre a messageNot startedLast—Best—Failed0Hints0Open
- 37Transform a label visuallyNot startedLast—Best—Failed0Hints0Open
- 38Space the letters in a labelNot startedLast—Best—Failed0Hints0Open
- 39Underline a link clearlyNot startedLast—Best—Failed0Hints0Open
- 40Adjust spacing between wordsNot startedLast—Best—Failed0Hints0Open
CSS 05Box model, sizing, overflow and positioning
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Box model, sizing, overflow and positioning
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- 41Separate cards with marginNot startedLast—Best—Failed0Hints0Open
- 42Give content space with paddingNot startedLast—Best—Failed0Hints0Open
- 43Build a complete borderNot startedLast—Best—Failed0Hints0Open
- 44Keep width with border-boxNot startedLast—Best—Failed0Hints0Open
- 45Combine width and max-widthNot startedLast—Best—Failed0Hints0Open
- 46Give a section a minimum heightNot startedLast—Best—Failed0Hints0Open
- 47Protect a table with overflow-xNot startedLast—Best—Failed0Hints0Open
- 48Control a long vertical feedNot startedLast—Best—Failed0Hints0Open
- 49Create a positioning referenceNot startedLast—Best—Failed0Hints0Open
- 50Position a badge inside a cardNot startedLast—Best—Failed0Hints0Open
CSS 06Flexbox and one-dimensional components
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Flexbox and one-dimensional components
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- 51Create your first flex containerNot startedLast—Best—Failed0Hints0Open
- 52Change the axis to a columnNot startedLast—Best—Failed0Hints0Open
- 53Distribute space between actionsNot startedLast—Best—Failed0Hints0Open
- 54Centre items on the cross axisNot startedLast—Best—Failed0Hints0Open
- 55Add consistent space with gapNot startedLast—Best—Failed0Hints0Open
- 56Allow items to wrap onto a new lineNot startedLast—Best—Failed0Hints0Open
- 57Let cards grow evenlyNot startedLast—Best—Failed0Hints0Open
- 58Protect an item from shrinkingNot startedLast—Best—Failed0Hints0Open
- 59Align one action independentlyNot startedLast—Best—Failed0Hints0Open
- 60Build a flexible action barNot startedLast—Best—Failed0Hints0Open
CSS 07CSS Grid and two-dimensional layout
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CSS Grid and two-dimensional layout
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- 61Create your first Grid containerNot startedLast—Best—Failed0Hints0Open
- 62Build two equal columnsNot startedLast—Best—Failed0Hints0Open
- 63Repeat three equal columnsNot startedLast—Best—Failed0Hints0Open
- 64Separate tracks with gapNot startedLast—Best—Failed0Hints0Open
- 65Combine an auto column with a flexible oneNot startedLast—Best—Failed0Hints0Open
- 66Span an item across two columnsNot startedLast—Best—Failed0Hints0Open
- 67Build auto, flexible, auto rowsNot startedLast—Best—Failed0Hints0Open
- 68Name the areas of a pageNot startedLast—Best—Failed0Hints0Open
- 69Centre items inside Grid cellsNot startedLast—Best—Failed0Hints0Open
- 70Build a fluid card gridNot startedLast—Best—Failed0Hints0Open
CSS 08Responsive design, media queries and adaptive images
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Responsive design, media queries and adaptive images
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- 71Adapt the layout for a narrow screenNot startedLast—Best—Failed0Hints0Open
- 72Build mobile-first with min-widthNot startedLast—Best—Failed0Hints0Open
- 73Increase spacing at a breakpointNot startedLast—Best—Failed0Hints0Open
- 74Create fluid heading type with clamp()Not startedLast—Best—Failed0Hints0Open
- 75Keep an image inside its containerNot startedLast—Best—Failed0Hints0Open
- 76Fill an image frame with object-fitNot startedLast—Best—Failed0Hints0Open
- 77Offer images for different pixel densitiesNot startedLast—Best—Failed0Hints0Open
- 78Describe responsive image candidate widthsNot startedLast—Best—Failed0Hints0Open
- 79Change art direction with pictureNot startedLast—Best—Failed0Hints0Open
- 80Build a complete responsive cardNot startedLast—Best—Failed0Hints0Open
CSS 09States, focus, transitions, reduced motion and accessibility
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States, focus, transitions, reduced motion and accessibility
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- 81Show a button hover stateNot startedLast—Best—Failed0Hints0Open
- 82Confirm pressing with :activeNot startedLast—Best—Failed0Hints0Open
- 83Draw a visible focus indicatorNot startedLast—Best—Failed0Hints0Open
- 84Highlight the focused fieldNot startedLast—Best—Failed0Hints0Open
- 85Style a disabled buttonNot startedLast—Best—Failed0Hints0Open
- 86Respond to a checked checkboxNot startedLast—Best—Failed0Hints0Open
- 87Show an invalid field stateNot startedLast—Best—Failed0Hints0Open
- 88Transition only the needed propertiesNot startedLast—Best—Failed0Hints0Open
- 89Respect the reduced motion preferenceNot startedLast—Best—Failed0Hints0Open
- 90Build an accessible interactive buttonNot startedLast—Best—Failed0Hints0Open
CSS 10Organisation, custom properties, debugging and performance
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Organisation, custom properties, debugging and performance
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- 91Create a brand colour variableNot startedLast—Best—Failed0Hints0Open
- 92Add a fallback value to var()Not startedLast—Best—Failed0Hints0Open
- 93Override a token inside a componentNot startedLast—Best—Failed0Hints0Open
- 94Calculate spacing from a tokenNot startedLast—Best—Failed0Hints0Open
- 95Centre content with logical propertiesNot startedLast—Best—Failed0Hints0Open
- 96Keep specificity low with :where()Not startedLast—Best—Failed0Hints0Open
- 97Include padding in element sizingNot startedLast—Best—Failed0Hints0Open
- 98List transition properties explicitlyNot startedLast—Best—Failed0Hints0Open
- 99Defer rendering of off-screen contentNot startedLast—Best—Failed0Hints0Open
- 100Build a component with tokensNot startedLast—Best—Failed0Hints0Open
JAVASCRIPT 01Syntax, variables, values and types
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Syntax, variables, values and types
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- 01Print your first resultNot startedLast—Best—Failed0Hints0Open
- 02Declare a constantNot startedLast—Best—Failed0Hints0Open
- 03Update a variableNot startedLast—Best—Failed0Hints0Open
- 04Calculate with numbersNot startedLast—Best—Failed0Hints0Open
- 05Combine values in a templateNot startedLast—Best—Failed0Hints0Open
- 06Compare valuesNot startedLast—Best—Failed0Hints0Open
- 07Check a value typeNot startedLast—Best—Failed0Hints0Open
- 08Observe null and undefinedNot startedLast—Best—Failed0Hints0Open
- 09Convert explicitly to a numberNot startedLast—Best—Failed0Hints0Open
- 10Build a value summaryNot startedLast—Best—Failed0Hints0Open
JAVASCRIPT 02Operators, comparisons and conditions
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Operators, comparisons and conditions
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- 11Calculate a remainderNot startedLast—Best—Failed0Hints0Open
- 12Raise a number to a powerNot startedLast—Best—Failed0Hints0Open
- 13Compare two values strictlyNot startedLast—Best—Failed0Hints0Open
- 14Check strict inequalityNot startedLast—Best—Failed0Hints0Open
- 15Combine two conditions with ANDNot startedLast—Best—Failed0Hints0Open
- 16Choose the first available valueNot startedLast—Best—Failed0Hints0Open
- 17Invert a boolean valueNot startedLast—Best—Failed0Hints0Open
- 18Run a branch with ifNot startedLast—Best—Failed0Hints0Open
- 19Choose between two branchesNot startedLast—Best—Failed0Hints0Open
- 20Choose with the conditional operatorNot startedLast—Best—Failed0Hints0Open
JAVASCRIPT 03Control flow, loops and functions
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Control flow, loops and functions
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- 21Choose a branch with switchNot startedLast—Best—Failed0Hints0Open
- 22Repeat with whileNot startedLast—Best—Failed0Hints0Open
- 23Run at least once with do…whileNot startedLast—Best—Failed0Hints0Open
- 24Count with forNot startedLast—Best—Failed0Hints0Open
- 25Stop a loop with breakNot startedLast—Best—Failed0Hints0Open
- 26Skip an iteration with continueNot startedLast—Best—Failed0Hints0Open
- 27Declare and call a functionNot startedLast—Best—Failed0Hints0Open
- 28Receive a value through a parameterNot startedLast—Best—Failed0Hints0Open
- 29Return a valueNot startedLast—Best—Failed0Hints0Open
- 30Use a default parameterNot startedLast—Best—Failed0Hints0Open
JAVASCRIPT 04Strings, arrays and basic operations
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Strings, arrays and basic operations
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- 31Measure a string lengthNot startedLast—Best—Failed0Hints0Open
- 32Convert text to uppercaseNot startedLast—Best—Failed0Hints0Open
- 33Check text with includesNot startedLast—Best—Failed0Hints0Open
- 34Extract a portion with sliceNot startedLast—Best—Failed0Hints0Open
- 35Create your first arrayNot startedLast—Best—Failed0Hints0Open
- 36Read an element by indexNot startedLast—Best—Failed0Hints0Open
- 37Add an element with pushNot startedLast—Best—Failed0Hints0Open
- 38Remove the last element with popNot startedLast—Best—Failed0Hints0Open
- 39Search an array with includesNot startedLast—Best—Failed0Hints0Open
- 40Join array elementsNot startedLast—Best—Failed0Hints0Open
JAVASCRIPT 05Objects, properties and data transformation
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Objects, properties and data transformation
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- 41Create your first objectNot startedLast—Best—Failed0Hints0Open
- 42Read a property with dot notationNot startedLast—Best—Failed0Hints0Open
- 43Read a property with bracketsNot startedLast—Best—Failed0Hints0Open
- 44Update a propertyNot startedLast—Best—Failed0Hints0Open
- 45Add a new propertyNot startedLast—Best—Failed0Hints0Open
- 46Read a nested objectNot startedLast—Best—Failed0Hints0Open
- 47Define an object methodNot startedLast—Best—Failed0Hints0Open
- 48List keys with Object.keysNot startedLast—Best—Failed0Hints0Open
- 49Run a callback with forEachNot startedLast—Best—Failed0Hints0Open
- 50Transform an array with mapNot startedLast—Best—Failed0Hints0Open