Open the command palette and run Array Index Visual Debugger: Open Panel. Enter the name of the array and select whether it's 1D or 2D. Enter the index variables you want to visualize. In 2D mode, you ...

What is array index? JavaScript arrays are zero - indexed: the first element of an array is at index 0, the second is at index 1, and so on — and the last element is at the value of the array's length ...