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Cards In This Set
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How do you include JavaScript in your project?
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You can inline your Javascript between <script> tags in an html document or you can import an external javascript file with the src option.<script src="/path/to/example.js"></script>
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Why might you put your JavaScript includes at the bottom of the <body> tag?
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To allow the page's DOM to fully load. By using this special function your scripts will always wait for the DOM to be fully constructed before acting.$(document).ready()
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What is “JS Bin“?
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It is an online editor. You can place HTML, CSS, and JS it in and run them to test ideas and practice.
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Where is the official JavaScript documentation located?
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Mozilla Developer Network Reference
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Are semicolons required?
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Semi-colons are required at the end of every line.
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Are curly braces required?
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Curly braces are required around object bodies and function bodies (with the exception of single-statement fat-arrow functions in ES6), and they're sometimes required around conditional and loop bodies. If a condition or loop has only one statement in its body, they're optional:
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Are parentheses required for function invocation?
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Parentheses are required for function invocation.
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What's the difference between using var myVar = "foo"; and myVar = "foo";?
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If you declare a variable without var the variable will be assigned to the global scope.
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What's the difference between JS's undefined and null?
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Undefined is the absence of a value. Null is an intentionally void value. Undefined == Null will result in true because both values are falsy. Use === to check instead.
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How do you make an alert box pop up?
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Alert("Hello");
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How do you write to the console?
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Console.log("Hi");
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What can you put as keys in an Object in JavaScript?
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Keys are always strings but you can omit the double quotes when assigning properties inside of curly braces.
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What can you put as values?
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Values can be any primitive data types but also other objects and functions.
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What are two ways to get or set values to or from an object?
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You can get or set an objects values using either bracket-notation or dot-notation.
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In an object, is there a difference between using a plain text identifier like "myProperty"?
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There is no difference.
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