Which of the following will correctly detect browser language preference?

Which code shows the correct way to detect an array that does not contain a specific value?

Which modifiers must be set if the JavaScript lastIndex object property was used during pattern matching?

What is the cleanest, most effective way to validate decimal numbers in JavaScript?

Which code snippet returns '[object object]'?

Which are JavaScript unit testing tools?

Which methods can accept negative indexes?

Correct syntax of DataView view of JavaScript?

Which method of Int8Array object is used for testing if all array elements pass the test given by a function or not?

Which method is used to return the primitive value of a Boolean object?

What will be printed after execution of following JavaScript code? var var1 = 10; document.write('First Value: ' + var1 + ' and Second Value: ' + var2); var var2 = 20;