Suppose you are writing an anonymous JavaScript function that will run when your web page loads, and you want to include a statement that will cause a selection list in a web form to become active and ready for data entry. Which method should you apply in this statement?

To format a number stored in the variable x using the local standards for displaying numeric values on a user’s computer, you can use the JavaScript statement _____.

Suppose you want to add the following statement to your JavaScript code in order to help you trace an error. What belongs in the blank? _____(“totalPrice = ” + totalPrice);

Which JavaScript method will create a node list by selecting all the paragraph element nodes belonging to the narrative class?

The only way to run a JavaScript function upon an event such as a page loading or a user clicking a page element is to enclose the function within an event handler or event listener.

Suppose you see the following lists of functions in the call stack window of your browser’s debugger as you are examining your JavaScript code. What does this call stack information indicate? siftFlour prepareBatter bakeCupcakes

You can correct an error in a JavaScript program by creating an event listener that runs a function, for instance by adding window.addEventListener(“error”, handleErrors).

You have written JavaScript code that assigns a reference to a selection list on your web form to the variable crustStyle. If you need to retrieve the number of choices available to the user within the crustStyle selection list, you should use the _____.

Suppose you are examining the script for the orderForm web form, whose submit button has the id submitButton. The form includes option buttons for choosing a pizza sauce flavor. The following JavaScript code included in the script will check for a sauce selection when the user clicks the submit button and display a custom error message if a sauce was not chosen. ​ let submitButton = document.getElementById(“submitButton”); submitButton.addEventListener(“click”, validateSauce); function validateSauce() {    let sauce = document.forms.orderForm.elements.sauceType;    if (sauce.validity.valueMissing) {       sauce.setCustomValidity(“”);    } else {       sauce.setCustomValidity(“Choose a sauce, please”);    } }

For an array stored in the variable customers whose highest index value is 34, the customers.length property will return the value _____.