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mfs-js-console is a GM userscript that adds a little CLI on pages

Table of Contents Feature summary Commands Planned features Usage notes

Feature summary

Core functionality includes:

• argument parsing with "quoted strings", -key values and -switches
• most-recently used (MRU) list
• variables
  • variables set to page element attributes using CSS/jQuery/querySelector selector syntax
  • Support for JSON values
  • Append and add value to existing variable
  • Push and pop variable stack
  • Dynamic variables such as the current location and time
  • Get to the children of array and object values with dot and bracket notation
• aliases
  • passing of alias arguments to the alias commands
• saving and resetting of variables
• variable substitution in commands[note]
• global mode. console output from any page to all pages with console set to global mode.
• custom command support
• conditional processing (if command)
  • regex matching
  • chainable logic with multiple "if"s on a single command
• loops (for command)
  • index loops, with optional variable step
  • loop through values in an array/object
• match and replace strings with regular expression syntax
• partial support for markdown links in echo (echomd)
  • Support for clickable link which execute commands
• some commands support output to a variable

[note]: functionality toggled using variable value

Features added with commands:

• list images on page
  • filter by min and max sizes
  • display as thumb
• generate a list of links with sequential names e.g. 1.jpg to 10.jpg
• download images on page, or a list of images with sequential names (see above)
• list links on a page
  • filter out the links by domain name, path, etc.
• play HTML5-supported audio and video files
• sequential and timed batch execution. Used with audio-video, for example, to write the lyrics as the song plays
• print contents of text files onto the console
• DOM spy

Commands

Main page: Commands

Planned features

• math expression evaluation
• autoexec file
• DOM manipulation
• GUI icon binds to commands

Usage notes

• Press the ~ key to bring up the console. hold ctrl key to override. (currently buggy)
• Clicking on a command in the console log (defaults to green colour) copies it to the input text box.
• Type ``help``.