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From the Duckett JS book:

JavaScript book, Ch. 10, “Error Handling & Debugging”

Errors and handling

-JS processes one line of code at a time. When a statement needs data from another function, it stacks the new function on top of the current task.

Execution Context and hoisting

• 1) prepare
• the new scrop is created

• variables, functions, and arguments are created

• 2) Execute
• now it can assign values to variables
• reference functions and run their code
• execute statements.

#SSCOPEE

• *Functions are said to have lexical scope. They are linked to the object key they were defined within.

• for each execution context,the scope is the current execution context’s variables object, plus the variables object for each parent execution context

* this is a large chapter to summarize so I will just provide summary *

• if you understand execution context (two stages) and stacks, you are more likely to find code errors

• debuggings means finding errors

• use the console to help narrow down the area of the error.

• JS has 7 types of errors . and i know ill probably find them all so i dont have to worry, well get acquainted.