First off you are going to need to add the following to your tmux config ~/.tmux.conf:

bind -n DoubleClick1Pane {
   setw -g word-separators ' @"=()[]:'
   run-shell -t 0 "tmha #{mouse_word}"
}

bind -n C-DoubleClick1Pane {
   setw -g word-separators ' @"=()[]:'
   run-shell -t 0 "tmhac #{mouse_word}"
}

# Make it so when you Option Double Click on a word it is copied to the clip board - easier than selecting it usually
bind -n M-DoubleClick1Pane {
   setw -g word-separators ' @"=()[]:'
run-shell -t 0 "echo \"#{mouse_word}\" | pbcopy"
}

Make sure mouse mode is on:

set -g mouse on

I put the scripts in /usr/local/bin

/usr/local/bin/tmha

#!/usr/bin/env zsh

# tmux display-message "Clicked on: $1"

# alias l='exa -a -a -l'
# alias lx='exa -a -a -x'

if [[ "$1" == "package.json" ]]; then
    tmux send-keys -t "$pane" C-z "cat package.json | jq -r '.scripts'" Enter
    tmux send-keys -t "$pane" C-z 'npm run-script $(cat package.json | jq -r ".scripts | keys[]" | fzf)' Enter
elif [[ "$1" == "/Users/"* ]]; then
    tmux send-keys -t "$pane" C-z "lx" Enter
    tmux send-keys -t "$pane" C-z "code $1" Enter
else
    tmux send-keys -t "$pane" C-z "if [ -d "$1" ]; then cd $1 && lx; else code $1; fi" Enter
fi

/usr/local/bin/tmhac

#!/usr/bin/env zsh

# alias l='exa -a -a -l'
# alias lx='exa -a -a -x'

tmux send-keys -t "$pane" C-z "code $1" Enter

Now whenever you double click on a file it will either try to run npm run-scripts if it is package.json, if it is a specific path then just open VSCode editor to that path, or if it is a direcory then cd to that directory and list all files.

Note that Control clicking will lead to VSCode always being ran on the file clicked.

Then checkout my Alacritty Github Fork Releases. I have a build of Alacritty that, when Command Click occurs, the word clicked is echoed into the terminal.