Salesforce JavaScript Developer Practice Exam

What is the inline command a developer can use in an editor to set a breakpoint?

1. break

2. debugger

3. debug

4. breakpoint

The correct answer is: debugger

Setting a breakpoint in JavaScript allows developers to pause the execution of code at a specified line, enabling them to inspect the current state of the application, including variable values and the call stack. The inline command used for this purpose in JavaScript is "debugger." When the JavaScript engine encounters a debugger statement, it will pause execution at that point if the developer's tools are open, allowing for interactive debugging. This command is particularly useful during development and testing, as it enables a developer to step through code, analyze how it’s executing, and catch issues such as logic errors or unexpected behaviors. By adding "debugger;" at a specific point in the code, developers can effectively create a breakpoint without having to set one up externally in the debugging tools. This command is recognized broadly across browsers that support JavaScript debugging. Other commands, while they might sound appropriate, do not serve the purpose of setting a breakpoint in the same manner. Understanding how and when to use the "debugger" command is essential for effective debugging in JavaScript applications.