We create web pages by writing html which becomes interactive when we add javascript within an html script tag. Simple pages can be viewed using the browser's Open File... menu option.
One normally edits html scripts with a programming editor like Sublime. In a simple edit-test loop one would save the file already open in the browser and then refresh the browser tab to see the effects of one's changes.
Smalltalk
The File class represents a sequential binary File and provide primitives for various file operations. I am also the entry point of the FilePlugin primitives.
"Creating a file" file := File named: 'asd.txt' asFileReference fullName.