Expression evaluation

Echo the expression. 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.

Echo the expression as an error message. Just like :echo but echoes the result highlighted as ErrorMsg and saves it to the message history.

Echo the expression as an informational message. Just like :echo but also saves the message in the message history.

Execute the string that results from the evaluation of expr as an Ex command. Example: :execute "source " + io.getRCFile().path sources the appropriate RC file.

Note: Unlike Vim this currently only supports a single argument.

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 &liberator.host;.

completion is available for :javascript cmd (but not yet for the :js <<EOF multiline widget). Be aware that &liberator.appname; needs to run cmd through eval() to get the completions, which could have unwanted side effects.

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.

Deletes the variable name. Several variable names can be given. When used with ! no error message is output for non-existing variables.