Error handling and debugging

• error objects

• Handling exceptions

  try, catch, finally

try {
//Try to execute this code
catch (exception) {
//If there is an exception, run this code
finally {
//This always gets executed

• Throwing errors

throw new Error('message');

• debugging tips

  Another broswer add numbers strip it back explaining the code search code playgrounds validation tools (JavaScript, JSON, JQUERY)

-Common errors

go back to basics missed extra characters data type issues

Summary

• If you understand execution contexts (which have two stages) and stacks, you are more likely to find the error in your code.

• DebuggIng is the process of finding errors. It involves a process of deduction.

• The console helps narrow down the area in which the error is located, so you can try to find the exact error.

• JavaScript has 7 different types of errors. Each creates its own error object, which can tell you its line number and gives a description of the error.

• If you know that you may get an error, you can handle it gracefully using the try, catch, finally statements. Use them to give your users helpful feedback.