evaluate_script loads source code from local files

Introduced 2026-10-15 · score 0.98

HOW TO USE IT

When evaluating repository JavaScript in a target page, pass its local file path with `--sourcePath` and choose `--format` for how to interpret the source. Provide `sourcePath` or `function`, never both.

chrome-devtools evaluate_script --pageId 1 --sourcePath /path/to/script.js --format script

WHY THIS HELPS

When evaluating repository JavaScript in a target page, load the script from a local file and select its interpretation mode.

REQUIREMENTS AND LIMITATIONS

Version: 1.11.0
pageId (required): Targets a specific page by ID.
sourcePath: Absolute or relative path to a JavaScript file on the MCP server's local filesystem; provide this or `function`, but not both.
function: JavaScript source to execute; provide this or `sourcePath`, but not both.
format: `function` interprets source as a function declaration and supports `args`; `script` evaluates classic JavaScript and does not support `args`. Defaults to `function`; ECMAScript modules are unsupported. Values are alternatives.
args: Optional arguments passed to the function; supported with `format: function`.
`sourcePath` is an absolute or relative path on the MCP server's local filesystem.
Provide either `sourcePath` or `function`, but not both.
`function` format treats the source as a function declaration and supports args; `script` evaluates classic JavaScript and does not support args.
ECMAScript modules are not supported.
Returned values must be JSON-serializable.
Local source paths are validated through MCP roots.

FIRST-PARTY EVIDENCE

Check the installed version and the source before using it. Entry JSON

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Changes

evaluate_script loads source code from local files