vibium eval

Evaluate a JavaScript expression (optionally navigate to URL first).

Synopsis

vibium eval [url] [expression] [flags]

Flags

    --stdin   Read expression from stdin

Description

Executes <javascript> in the page context and prints the result to stdout. The script has full access to window, document, and any globals the page exposes.

This is the escape hatch for anything Vibium’s higher-level commands don’t cover — extracting computed values, dispatching custom events, querying the DOM with a custom selector, and so on. Reach for eval when the semantic commands aren’t enough; reach for the semantic commands first.

Examples

vibium eval "document.title"
vibium eval "document.querySelectorAll('article').length"
vibium eval "window.scrollTo(0, document.body.scrollHeight)"

See also

• vibium text, vibium find — prefer these when they fit.