The only difference is this: !isNan(1/0) // –> true isFinite(1/0) // –> false isNaN checks whether the argument is a number or not. The Infinities (+/-) are also numerical, thus they pass the isNaN check, but don’t pass the isFinite check. ** Note that any string which can be parsed as a number (“2”, “3.14”) … Read more
You may be looking for the “Event Listener Breakpoints” section on the right side of the Debugger area. Open that up and select the click event under “mouse”. See the screen image. Then click on the button in the app and you will immediately be taken to the code being executed.
Use console.dir: var element = document.documentElement; // or any other element console.log(element); // logs the expandable <html>…</html> console.dir(element); // logs the element’s properties and values If you’re inside the console already, you could simply type dir instead of console.dir: dir(element); // logs the element’s properties and values To simply list the different property names (without … Read more
I’ll try to add my piece of information. More than another JS lib As I understand it, Google Closure is not only another JS library, but it is also a set of tools that will allow you to optimize your JS code. Working with jQuery gives you good tools and a lightweight library, but it … Read more