Install and configure the math-preview package

README.org

@@ -215,6 +215,7 @@ the ~custom-file~ as [[info:emacs#Saving Customizations][saving customizations (
        magit                      ; Git Text-based User Interface
        marginalia                 ; minibuffer margin notes
        markdown-mode              ; markdown text mode
+       math-preview               ; display LaTeX math with MathJax
        no-littering               ; keep `user-emacs-directory' clean
        nov                        ; EPUB reader
        orderless                  ; Emacs completion style
@@ -1136,7 +1137,36 @@ advising to override ~TeX-brace-count-line~ with ~my-TeX-brace-count-line~.
     (advice-add 'TeX-brace-count-line :override #'my-TeX-brace-count-line))
 #+end_src
 
+*** [[https://gitlab.com/matsievskiysv/math-preview/-/blob/master/README.md][Math-preview]]
+:PROPERTIES:
+:CUSTOM_ID: sec:math-preview
+:END:
+
+#+caption[Configure =math-preview=]:
+#+caption: Configure =math-preview=.
+#+name: lst:configure-math-preview
+#+begin_src emacs-lisp
+  (with-eval-after-load 'math-preview
+    (let ((command (executable-find "~/node_modules/.bin/math-preview")))
+      (if command
+          (custom-set-variables
+           `(math-preview-command ,command)
+           '(math-preview-raise 0.5)
+           '(math-preview-scale 1))
+        ;; https://stackoverflow.com/a/17509764 answers:
+        ;; How to install an npm package from github directly?
+        (cl-destructuring-bind (exit-code output)
+            (shell-command-with-exit-code
+             "npm" "install" "git+https://gitlab.com/matsievskiysv/math-preview.git")
+          (if (= 0 exit-code) (message "%s" (string-trim output))
+            (error "%s" (string-trim output)))))))
+#+end_src
+
 *** TODO Improve the AUCTeX configuration slowly
+:PROPERTIES:
+:CUSTOM_ID: sec:configure-auctex-slowly
+:END:
+
 [[https://github.com/thisirs/dotemacs/blob/master/lisp/init-auctex.el][AUCTeX setup of an experienced user]]
 
 ** Writing Org files