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eval

This tool on every surface: CLI · MCP · Python · JavaScript · Go · Java · .NET

Run a JavaScript expression in the current WebView and return its value as a string. These call app_eval.

eval​

public String eval(String expression)

Runs a JavaScript expression in the current WebView; objects come back as JSON.

@param expression a JavaScript expression @return the expression's value; an object comes back as JSON

Examples​

Read the page title in a WebView​

String title = device.eval("document.title");

On a device​

mobium eval document.title on an Android 15 emulator

mobium eval document.title on an Android 15 emulator