I am using ZSH on Mac terminal and I enable vi mode in the terminal by adding set -o vi to my ~/.zshrc. When I am in the prompt line, and I type Hello, then I hit Esc to enter the non-insert mode, move my cursor to e and hit i to enter insert mode, I can not erase the H by hitting the backspace key.
Note that backspace key works on this same scenario when I open up a new file using vim test.txt and writing Hello and following the steps above, so I don't think this is a vim settings issue.
Also, I ran vi --version in my ~/.zshrc right before set -o vi and this is part of the output I got: VIM - Vi IMproved 9.0 (2022 Jun 28, compiled Feb 10 2024 02:02:30)
Please help me!
Try bindkey -M viins "^?" backward-delete-char.
Backspace is normally bound to vi-backward-delete-char, which is specifically documented to not do what you’re asking:
vi-backward-delete-char (unbound) (X) (^H)
Delete the character behind the cursor, without changing lines. If in insert mode, this won't delete past the point where insert mode was last entered.
backward-delete-char doesn’t have that restriction.