157) What are the different types of errors in JavaScript? Numeric Data Types. Here is a handy comparison table that shows the conversions that happen and the differences between == and ===. Explanation: The first statement does not follow the properties of strictly equal (===)operator, but second statement follows. So that's why the output of the above-given code will be obtained as true. In order to know about an object, whether the object is a prototype (or a part of a prototype chain) of another object, the user can use the "isPrototypeOf()" method. VS Code has built-in debugging support for the Node.js runtime and can debug JavaScript, TypeScript, or any other language that gets transpiled to JavaScript. Alternatively, you can run your configuration through the Command Palette (P (Windows, Linux Ctrl+Shift+P)) by filtering on Debug: Select and Start Debugging or typing 'debug ' and selecting the configuration you want to debug. 142) Which of the following syntax is correct to refer to an external script called "LFC.js"? Alternatively, you might need to open a folder, since no-folder debugging does not support launch configurations. JavaScript standard built-in objects, along with their methods and properties. Explanation: In JavaScript, the "use strict" is not a keyword because it not includes any language keywords. The following code default-exports the result of the expression 123: If you default-export an expression, you get: The local name was chosen so that it wouldnt clash with any other local name. Explanation: It is necessary to include not only that function's code in the internal state of the function's object, but also to provide references to the current scope chain. Disabled breakpoints have a filled gray circle. Support for both synchronous and asynchronous loading, 16.8.4. Similarly to AMD, they have direct support for asynchronous loading and configurable module loading. This kind of check is a popular feature of linters such as JSLint and JSHint; in ECMAScript 6, most of it can be performed by JavaScript engines. Finer breakpoint control (enable/disable/reapply) can be done in the Run and Debug view's BREAKPOINTS section. You can also initialize variables during its declaration. Modules can be used from browsers via a new variant of the