[puppeteer.evaluate]

puppeteer.evaluate is a slot in the puppeteer namespace, in Hyperlambda, the language of Magic Cloud. Evaluates JavaScript in the page context.

• Value (puppeteer-session), required: Puppeteer session ID
• Returns: Resolves to the result of the evaluated JavaScript expression
• Scope: requires puppeteer-session

Arguments

Required arguments come first, then the optional ones in the order they are declared.

Argument	Type	Required	Description
[expression]	string	yes	JavaScript expression or function.
[args]	string|lambda	no	Arguments passed to the JavaScript function.
[args] / unnamed child node	string	no	Argument value. Can be repeated.

Guide: How to use [puppeteer.evaluate]

JSON declaration

This is the complete declaration of puppeteer.evaluate, as the running system describes it. It is also published as slot.json.

JSON declaration

{
  "name": "puppeteer.evaluate",
  "description": "Evaluates JavaScript in the page context",
  "signature": {
    "input": {
      "kind": "puppeteer-session",
      "description": "Puppeteer session ID",
      "required": true,
      "mode": "ValueOrExpression"
    },
    "children": {
      "expression": {
        "type": "string",
        "kind": "javascript",
        "description": "JavaScript expression or function",
        "required": true,
        "mode": "ValueOrExpression",
        "cardinality": "ExactlyOne",
        "role": "Option",
        "projection": "Value"
      },
      "args": {
        "type": "string|lambda",
        "description": "Arguments passed to the JavaScript function",
        "required": false,
        "mode": "ValueOrExpression",
        "cardinality": "ZeroOrOne",
        "role": "Arguments",
        "projection": "ArgumentBag",
        "children": [
          {
            "type": "string",
            "kind": "javascript-argument",
            "description": "Argument value",
            "required": false,
            "mode": "ValueOrExpression",
            "cardinality": "ZeroOrMore",
            "role": "Option",
            "projection": "Value"
          }
        ]
      }
    },
    "scope": {
      "requires": "puppeteer-session"
    },
    "output": {
      "mode": "Value",
      "kind": "javascript-result",
      "description": "Resolves to the result of the evaluated JavaScript expression"
    }
  }
}

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