JavaScript instance

The underlying JavaScript instance

• Output text with JavaScript
• Change HTML elements with JavaScript
• An external JavaScript


• Instance resolution

JavaScript statements, comments, and blocks of code

• JavaScript statement
• JavaScript block of code
• JavaScript single-line comments
• JavaScript multi-line comments
• Use a single line of comments to prevent execution
• Use multiple lines of comments to prevent execution


• Instance resolution

JavaScript variable

• Declare a variable, assign it a value, and then display it


• Instance resolution

JavaScript conditional statement If ... Else

• If statement
• If... Else statement
• Random links
• Switch statement


• Instance resolution

JavaScript message box

• Alert box
• A warning box with a new line
• Confirmation box
• The prompt box


• Instance resolution

JavaScript function

• Function
• A function with arguments
• Function 2 with arguments
• The function that returns the value
• A function with arguments and a value returned


• Instance resolution

JavaScript loop

• For loop
• Loop out HTML titles
• While loop
• Do while loop
• Break statement
• The continue statement
• Using For... The In declaration traverses the elements within the array


• Instance resolution

JavaScript event

• Onclick event
• Onmouseover event


• Instance resolution

JavaScript error handling

• try... Catch statement
• Try with confirmation box... Catch statement
• Onerror event


• Instance resolution

Advanced JavaScript instance

• Create a welcome cookie
• Simple timing
• Another simple timing
• Timing events in an infinite loop
• Timing events in an infinite loop with a stop button
• Clocks made with timing events
• Create an instance of the object
• Create a template for the object