Main World

Main World is the page that the user is currently viewing

MainWorldExplanation

Usage

MainWorld Node

The input is an expression, such as document.title, the output is the ReturnValue of the expression.

(function () {
  /** @type {CompositeX.MetaNodeConfig} */
  const nodeConfig = {
    config: {
      name: "MainWorld",
      desc: "Get main world info",
      input: { type: "string" },
      output: { type: "any" },
      options: [
        { name: "expression", desc: 'expression in main world' type: "string" },
        {
          name: "type",
          desc: "choose eval if website support it or choose exec which has limits",
          type: "enum",
          enumItems: [
            { name: "eval", value: "eval" },
            { name: "exec", value: "exec" },
          ],
          default: "eval",
        },
      ],
    },
    run(input, options, context) {
      return context.mainWorld(input || options.expression, { type: options.type })
    },
  }
  return nodeConfig
})()

Eval vs Exec

Expressions can be executed in two ways, eval and exec

eval type is the same as the eval api of window, it can do anything like the api does, but it will not work if the CSP（Content Security Policy） (opens in a new tab)of the Main World does not support eval.
exec type only support some simple expression, such as document.querySelect('h1'), some complicated expression can not work, such as window.fetch("xxx").then(res => res.json()). It is not subject to the CSP (opens in a new tab).

API in context

context.mainWorld(expression: string, options?: { type: "eval" | "exec" })

For example

// ...
    run(input, options, context) {
        return context.mainWorld('document.title')
    }
// ...

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