# Playwright Browser Evaluate

> To run JavaScript in the page context, evaluate an expression on the page or a specific element for inspection or manipulation.

- Skill: `x-school-academy/playwright-browser-evaluate` (Agent Skill)
- Install (CLI): `npx skillmds add x-school-academy/playwright-browser-evaluate`
- Raw SKILL.md: https://api.skillmd.com/api/skills/x-school-academy/playwright-browser-evaluate/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: X-School-Academy (https://skillmd.com/u/x-school-academy)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/x-school-academy/playwright-browser-evaluate

---


## Usage
Use the MCP tool `dev-swarm.request` to send the payload as a JSON string:

```json
{"server_id":"playwright","tool_name":"browser_evaluate","arguments":{}}
```

## Tool Description
Evaluate JavaScript expression on page or element

## Arguments Schema
The schema below describes the `arguments` object in the request payload.
```json
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "function": {
      "type": "string",
      "description": "() => { /* code */ } or (element) => { /* code */ } when element is provided"
    },
    "element": {
      "description": "Human-readable element description used to obtain permission to interact with the element",
      "type": "string"
    },
    "ref": {
      "description": "Exact target element reference from the page snapshot",
      "type": "string"
    }
  },
  "required": [
    "function"
  ],
  "additionalProperties": false
}
```

## Background Tasks
If the tool returns a task id, poll the task status via the MCP request tool:

```json
{"server_id":"playwright","method":"tasks/status","params":{"task_id":"<task_id>"}}
```