Challenge Use the Javascript Console
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- Challenge Add a Negative Margin to an Element
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- Challenge Add Two Numbers with JavaScript
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- Challenge Adding A Default Option In Switch Statements
- Challenge Adjust the Margin of an Element
- Challenge Adjusting the Padding of an Element
- Challenge Appending Variables to Strings
- Challenge Apply the Default Bootstrap Button Style
- Challenge Assignment With A Returned Value
- Challenge Assignment with Divided by Equals
- Challenge Assignment with Minus Equals
- Challenge Assignment with Plus Equals
- Challenge Assignment with Times Equals
- Challenge Bring your JavaScript Slot Machine to Life
- Challenge Build JavaScript Objects
- Challenge Call out Optional Actions with Button Info
- Challenge Center Text with Bootstrap
- Challenge Chaining If Else Statements
- Challenge Change Text Inside an Element Using jQuery
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- Challenge Change the Color of Text
- Challenge Change the CSS of an Element Using jQuery
- Challenge Change the Font Size of an Element
- Challenge Check Radio Buttons and Checkboxes by Default
- Challenge Check the Length Property of a String Variable
- Challenge Clone an Element Using jQuery
- Challenge Comment out HTML
- Challenge Comment your JavaScript Code
- Challenge Comparison With The Equality Operator
- Challenge Comparison With The Greater Than Equal To Operator
- Challenge Comparison With The Greater Than Operator
- Challenge Comparison With The Inequality Operator
- Challenge Comparison With The Less Than Equal To Operator
- Challenge Comparison With The Less Than Operator
- Challenge Comparison With The Strict Equality Operator
- Challenge Comparison With The Strict Inequality Operator
- Challenge Comparisons With The Logical And Operator
- Challenge Comparisons With The Logical Or Operator
- Challenge Concatenate Strings with .concat
- Challenge Concatenating Strings with Plus Operator
- Challenge Concatenating Strings with the Plus Equals Operator
- Challenge Condense arrays with reduce
- Challenge Construct JavaScript Objects with Functions
- Challenge Constructing Strings with Variables
- Challenge Convert JSON Data to HTML
- Challenge Count Backwards With a For Loop
- Challenge Create a Block Element Bootstrap Button
- Challenge Create a Bootstrap Button
- Challenge Create a Bootstrap Headline
- Challenge Create a Bootstrap Row
- Challenge Create a Bulleted Unordered List
- Challenge Create a Class to Target with jQuery Selectors
- Challenge Create a Custom Heading
- Challenge Create a Form Element
- Challenge Create a JavaScript Slot Machine
- Challenge Create a Set of Checkboxes
- Challenge Create a Set of Radio Buttons
- Challenge Create a Text Field
- Challenge Create an Ordered List
- Challenge Create Bootstrap Wells
- Challenge Create Decimal Numbers with JavaScript
- Challenge Declare JavaScript Objects as Variables
- Challenge Declare JavaScript Variables
- Challenge Declare String Variables
- Challenge Decrement a Number with Javascript
- Challenge Delete HTML Elements
- Challenge Delete Properties from a JavaScript Object
- Challenge Delete your jQuery Functions
- Challenge Disable an Element Using jQuery
- Challenge Ditch Custom CSS for Bootstrap
- Challenge Divide One Number by Another with JavaScript
- Challenge Escape Sequences in Strings
- Challenge Escaping Literal Quotes in Strings
- Challenge Fill in the Blank with Placeholder Text
- Challenge Filter Arrays with filter
- Challenge Find Numbers with Regular Expressions
- Challenge Find the Length of a String
- Challenge Find White Space with Regular Expressions
- Challenge Finding a Remainder in Javascript
- Challenge Generate Random Fractions with JavaScript
- Challenge Generate Random Whole Numbers with JavaScript
- Challenge Generate Random Whole Numbers within a Range
- Challenge Get Geo location Data
- Challenge Get JSON with the jQuery getJSON Method
- Challenge Give a Background Color to a Div Element
- Challenge Give Each Element a Unique ID
- Challenge Give your JavaScript Slot Machine some stylish images
- Challenge Global Scope And Functions
- Challenge Global Vs Local Scope In Functions
- Challenge Headline with the h2 Element
- Challenge House our page within a Bootstrap Container Fluid Div
- Challenge Import a Google Font
- Challenge Increment a Number with Javascript
- Challenge Inform with the Paragraph Element
- Challenge Inherit Styles from the Body Element
- Challenge Initializing Variables with the Equal Operator
- Challenge Introducing Else If Statements
- Challenge Introducing Else Statements
- Challenge Introducing Javascript Object Notation Json
- Challenge Invert Regular Expression Matches with JavaScript
- Challenge Iterate Odd Numbers With a For Loop
- Challenge Iterate over Arrays with map
- Challenge Iterate Through An Array With A For Loop
- Challenge Iterate with JavaScript For Loops
- Challenge Iterate with JavaScript While Loops
- Challenge Join Strings with .join
- Challenge Label Bootstrap Buttons
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- Challenge Learn how Script Tags and Document Ready Work
- Challenge Line up Form Elements Responsively with Bootstrap
- Challenge Link to External Pages with Anchor Elements
- Challenge Local Scope And Functions
- Challenge Make Circular Images with a Border Radius
- Challenge Make Dead Links using the Hash Symbol
- Challenge Make Images Mobile Responsive
- Challenge Make Instances of Objects with a Constructor Function
- Challenge Make Object Properties Private
- Challenge Make Unique Objects by Passing Parameters to our Constructor
- Challenge Manipulate Arrays With pop()
- Challenge Manipulate Arrays With push()
- Challenge Manipulate Arrays With shift()
- Challenge Manipulate Arrays With unshift()
- Challenge Manipulate JavaScript Objects
- Challenge Modify Array Data With Indexes
- Challenge Multiple Identical Options In Switch Statements
- Challenge Multiply Two Numbers with JavaScript
- Challenge Nest an Anchor Element within a Paragraph
- Challenge Nest Many Elements within a Single Div Element
- Challenge Nest one Array within Another Array
- Challenge Nesting For Loops
- Challenge Override All Other Styles by using Important
- Challenge Override Class Declarations by Styling ID Attributes
- Challenge Override Class Declarations with Inline Styles
- Challenge Override Styles in Subsequent CSS
- Challenge Passing Values To Functions With Arguments
- Challenge Perform Arithmetic Operations on Decimals with JavaScript
- Challenge Prefilter JSON
- Challenge Prioritize One Style Over Another
- Challenge Quoting Strings with Single Quotes
- Challenge Remove an Element Using jQuery
- Challenge Remove Classes from an element with jQuery
- Challenge Render Images from Data Sources
- Challenge Replacing If Else Chains With Switch
- Challenge Responsively Style Checkboxes
- Challenge Responsively Style Radio Buttons
- Challenge Return A Value From A Function With Return
- Challenge Return Early Pattern For Functions
- Challenge Returning Boolean Values From Functions
- Challenge Reverse Arrays with reverse
- Challenge Save your Code Revisions Forever with Git
- Challenge Say Hello to HTML Elements
- Challenge Selecting From Many Options With Switch Statements
- Challenge Set the Font Family of an Element
- Challenge Set the ID of an Element
- Challenge Sift through Text with Regular Expressions
- Challenge Size your Images
- Challenge Solution Template
- Challenge Sort Arrays with sort
- Challenge Specify How Fonts Should Degrade
- Challenge Split Strings with split
- Challenge Split your Bootstrap Row
- Challenge Store Multiple Values in one Variable using JavaScript Arrays
- Challenge Storing Values with the Equal Operator
- Challenge Style Multiple Elements with a CSS Class
- Challenge Style Text Inputs as Form Controls
- Challenge Style the HTML Body Element
- Challenge Subtract One Number from Another with JavaScript
- Challenge Target a Specific Child of an Element Using jQuery
- Challenge Target Elements by Class Using jQuery
- Challenge Target Elements by ID Using jQuery
- Challenge Target Even Numbered Elements Using jQuery
- Challenge Target HTML Elements with Selectors Using jQuery
- Challenge Target the Children of an Element Using jQuery
- Challenge Target the Parent of an Element Using jQuery
- Challenge Target the same element with multiple jQuery Selectors
- Challenge Taste the Bootstrap Button Color Rainbow
- Challenge Testing Objects For Properties
- Challenge Trigger Click Events with jQuery
- Challenge Turn an Image into a Link
- Challenge Uncomment HTML
- Challenge Understand Boolean Values
- Challenge Understand String Immutability
- Challenge Understanding Case Sensitivity in Variables
- Challenge Understanding Uninitialized Variables
- Challenge Updating Object Properties
- Challenge Use a CSS Class to Style an Element
- Challenge Use Abbreviated Hex Code
- Challenge Use an ID Attribute to Style an Element
- Challenge Use appendTo to Move Elements with jQuery
- Challenge Use Bracket Notation to Find the First Character in a String
- Challenge Use Bracket Notation to Find the Last Character in a String
- Challenge Use Bracket Notation to Find the Nth Character in a String
- Challenge Use Bracket Notation to Find the Nth to Last Character in a String
- Challenge Use Clockwise Notation to Specify the Margin of an Element
- Challenge Use Clockwise Notation to Specify the Padding of an Element
- Challenge Use Comments to Clarify Code
- Challenge Use Conditional Logic with If Else Statements
- Challenge Use CSS Selectors to Style Elements
- Challenge Use Hex Code for Specific Colors
- Challenge Use Hex Code for Specific Shades of Gray
- Challenge Use Hex Code to Color Elements Blue
- Challenge Use Hex Code to Color Elements Gray
- Challenge Use Hex Code to Color Elements Green
- Challenge Use Hex Code to Color Elements Red
- Challenge Use Hex Code to Color Elements White
- Challenge Use Hex Code to Mix Colors
- Challenge Use HTML5 to Require a Field
- Challenge Use jQuery to Modify the Entire Page
- Challenge Use Responsive Design with Bootstrap Fluid Containers
- Challenge Use RGB to Color Elements Blue
- Challenge Use RGB to Color Elements Gray
- Challenge Use RGB to Color Elements Green
- Challenge Use RGB to Color Elements Red
- Challenge Use RGB to Color Elements White
- Challenge Use RGB to Mix Colors
- Challenge Use RGB values to Color Elements
- Challenge Use Spans for Inline Elements
- Challenge Use the Bootstrap Grid to Put Elements Side By Side
- Challenge Use the Javascript Console
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JS Concepts
JS Language Reference
- arguments
- Array.prototype.filter
- Array.prototype.indexOf
- Array.prototype.map
- Array.prototype.pop
- Array.prototype.push
- Array.prototype.shift
- Array.prototype.slice
- Array.prototype.some
- Array.prototype.toString
- Boolean
- for loop
- for..in loop
- for..of loop
- String.prototype.split
- String.prototype.toLowerCase
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- undefined
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Both Chrome and Firefox have excellent JavaScript consoles, also known as DevTools, for debugging your JavaScript.
You can find Developer tools in your Chrome's menu or Web Console in FireFox's menu. If you're using a different browser, or a mobile phone, we strongly recommend switching to desktop Firefox or Chrome.
You can also use https://repl.it/ to run code online.
This is how you print to the console: console.log('Hello world!')
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