expression expr eval
INTRO TO BE WRITTEN…
:ec :echo
Display a string at the bottom of the window. Useful for showing informational messages. Multiple lines can be separated by \n. {expr} can either be a quoted string, or any expression which can be fed to eval() like 4+5. You can also view the source code of objects and functions if the return value of {expr} is an object or function.
:echoe :echoerr
Display an error string at the bottom of the window. Just like :ec[ho], but echoes the result highlighted in red. Useful for showing important messages.
:exe :execute
Execute the string that results from the evaluation of {expr1} as an Ex command. Example: :execute echo "test" shows a message with the text "test".
:js :javas :javascript
Run any JavaScript command through eval(). Acts as a JavaScript interpreter by passing the argument to eval(). :javascript alert('Hello world') shows a dialog box with the text "Hello world". :javascript <<EOF reads all the lines until a line starting with 'EOF' is found, and interpret them with the JavaScript eval() function.
The special version :javascript! opens the JavaScript console of Firefox.
Rudimentary <Tab> completion is available for :javascript {cmd}<Tab> (but not yet for the :js <<EOF multiline widget). Be aware that Vimperator needs to run {cmd} through eval() to get the completions, which could have unwanted side effects.
:let
Sets or lists a variable. Sets the variable {var-name} to the value of the expression {expr1}. If no expression is given, the value of the variable is displayed.Without arguments, displays a list of all variables.
:unl :unlet
Deletes the variable {name}. Several variable names can be given. When used with [!] no error message is output for non-existing variables.