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blackwhite084

Playwright Server MCP

playwright_fill

Automate filling input fields on web pages using a CSS selector and specified value. Simplify web interactions with precise field targeting and data input.

Instructions

Fill out an input field

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
selectorYesCSS selector for input field
valueYesValue to fill

Implementation Reference

  • The FillToolHandler class implements the core logic for the 'playwright_fill' tool. It retrieves the active Playwright page session, locates the element by CSS selector, fills it with the provided value using page.locator().fill(), and returns a confirmation message.
    class FillToolHandler(ToolHandler): async def handle(self, name: str, arguments: dict | None) -> list[types.TextContent | types.ImageContent | types.EmbeddedResource]: if not self._sessions: return [types.TextContent(type="text", text="No active session. Please create a new session first.")] session_id = list(self._sessions.keys())[-1] page = self._sessions[session_id]["page"] selector = arguments.get("selector") value = arguments.get("value") await page.locator(selector).fill(value) return [types.TextContent(type="text", text=f"Filled element with selector {selector} with value {value}")]
  • The JSON Schema for the 'playwright_fill' tool defines the required input parameters: 'selector' (CSS selector for the input field) and 'value' (string to fill into the field).
    types.Tool( name="playwright_fill", description="Fill out an input field", inputSchema={ "type": "object", "properties": { "selector": {"type": "string", "description": "CSS selector for input field"}, "value": {"type": "string", "description": "Value to fill"} }, "required": ["selector", "value"] } ),
  • The 'playwright_fill' tool is registered in the global 'tool_handlers' dictionary, mapping the tool name to an instance of FillToolHandler. This dictionary is used by the @server.call_tool() handler to dispatch tool calls.
    tool_handlers = { "playwright_navigate": NavigateToolHandler(), "playwright_screenshot": ScreenshotToolHandler(), "playwright_click": ClickToolHandler(), "playwright_fill": FillToolHandler(), "playwright_evaluate": EvaluateToolHandler(), "playwright_click_text": ClickTextToolHandler(), "playwright_get_text_content": GetTextContentToolHandler(), "playwright_get_html_content": GetHtmlContentToolHandler(), "playwright_new_session":NewSessionToolHandler(), }

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