Test for ansi escape sequences1/14/2024 ![]() ![]() And terminfo even allows one to write a terminal definition relative to another - notably referencing another to use as a base reference, and then adding/removing/changing the defined capabilities relative to that.Īnd. or even want to add a different definition to get somewhat different behavior out of the terminal, one can write the relevant (typically terminfo) entry for such terminal (emulation). So, if you've got a terminal (or emulation) that's not supported, and you want to add it. *nix even has the capability to write descriptions for new/different terminal types. regardless of what terminal type is being used. got a non-ANSI terminal? Use tput/terminfo/etc., and it'll still work - at least if it can and has the relevant capabilities. But again, don't presume the terminal is ANSI capable. Heck, you can even use tput to figure out ANSI escape codes if you want/need to. Presuming the terminal is ANSII or the like is a bad idea - it may not be at all.Īppropriate approach is to use the relevant terminfo libraries (or alternatively termcap - notably for older systems that may lack terminfo).Īnd as for CLI, that can generally be done using the tput utility. *nix uses and supports hundreds - if not thousands of types of terminal types (and emulations). ![]() Well, I see the tag "Linux" on the post, so I would say, in the land of *nix, that's NOT THE WAY TO DO IT! I only have three small features not in ctlseqs, and use XTVERSION and DECRQM to ensure they are only used when the terminal claims support. I do try to stick as close to stock xterm as I can. Rinse and repeat for any additional options. DECSDM was flat out documented wrong in VT340, which xterm implemented wrong, we all copied, and then j4james found other terminals doing it right, plus the Thai language manual and the VT340 tests so that was a few months of the terminal emulators updating to be correct. someone puts a mostly-transparent image up. hackerb9 recently (and I think saitoha too several years ago) bought a real VT340 and has been testing it with sequences and screenshots so that we can see what should really happen when e.g. ) there is still a lot of wiggle room as to what that means. Thing is even we had terminfo's for "yes, this terminal has sixel" (or iTerm2, or Kitty, or synchronized output, or proper DECSDM. Documented by jsdoc-to-markdown.I'm quite far outside robust solutions these days. Within a modern browser ECMAScript Module: import ansi from './node_modules/ansi-escape-sequences/dist/index.mjs' Within Node.js with ECMAScript Module support enabled: import ansi from 'ansi-escape-sequences' Node.js: const ansi = require('ansi-escape-sequences') It can be loaded anywhere, natively without transpilation. This library is compatible with Node.js, the Web and any style of module loader. Partial, inline styling can also be applied using the syntax ') > ansi.styles()Ī convenience function, applying the styles provided in styleArray to the input string. Returns an ansi sequence setting one or more styles. Returns a 24-bit "true colour" background colour escape sequence. Kind: static method of ansi-escape-sequences Param Returns a 24-bit "true colour" foreground colour escape sequence. Kind: static enum of ansi-escape-sequences Properties NameĮxample console.log( + 'this is red' + ) Various formatting styles (aka Select Graphic Rendition codes). If n is one, clear from cursor to beginning of the line. If n is zero (or missing), clear from cursor to the end of the line. If n is 2, clear entire screen.Įrases part of the line. If n is 1, clear from cursor to beginning of the screen. If n is 0 (or missing), clear from cursor to end of screen. The values are 1-based, and default to 1 (top left corner) if omitted.Ĭlears part of the screen. Moves cursor to beginning of the line n lines up. Moves cursor to beginning of the line n lines down. If the cursor is already at the edge of the screen, this has no effect Kind: static property of cursor cursor.up() ⇒ string Kind: static property of cursor cursor.show Kind: static property of ansi-escape-sequences API ReferenceĮxample import ansi from 'ansi-escape-sequences' Useful for adding colour to your command-line output, or building a dynamic text user interface. A simple library containing all known terminal ansi escape codes and sequences. ![]()
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