evaluate(pageFunction[, arg])
This is documentation for the next version of K6. For the latest stable release, go to the latest version.
Open source
evaluate(pageFunction[, arg])
Returns the value of the pageFunction
invocation.
Parameter | Type | Defaults | Description |
---|---|---|---|
pageFunction | function or string | Function to be evaluated in the page context. This can also be a string. | |
arg | string | '' | Optional argument to pass to pageFunction |
Returns
Type | Description |
---|---|
Promise<any> | The value of the pageFunction invocation. |
Example
JavaScript
import { browser } from 'k6/browser';
import { check } from 'k6/http';
export const options = {
scenarios: {
browser: {
executor: 'shared-iterations',
options: {
browser: {
type: 'chromium',
},
},
},
},
};
export default async function () {
const page = await browser.newPage();
await page.goto('https://test.k6.io/browser.php');
const dimensions = await page.evaluate(() => {
const obj = {
width: document.documentElement.clientWidth,
height: document.documentElement.clientHeight,
deviceScaleFactor: window.devicePixelRatio,
};
return obj;
});
check(dimensions, {
width: (d) => d.width === 1280,
height: (d) => d.height === 720,
scale: (d) => d.deviceScaleFactor === 1,
});
}
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