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Playwright is an Elixir library to automate Chromium, Firefox and WebKit browsers with a single API. Playwright delivers automation that is ever-green, capable, reliable and fast.

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playwright lib playwright runner helpers expression.ex
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lib/playwright/runner/helpers/expression.ex 

defmodule Playwright.Runner.Helpers.Expression do

  @moduledoc false



  # Page.evaluate(page, "function () { return 'lala'; }")

  # Page.evaluate(page, "() => { return 'lala'; }")

  # Page.evaluate(page, "() => 'lala'")

  # Page.evaluate(page, "(thing) => { return thing; }")

  # Page.evaluate(page, "(thing) => thing;")

  # Page.evaluate(page, "thing => thing;")



  def function?("function" <> _) do

    true

  end



  def function?("() =>" <> _) do

    true

  end



  def function?(expression) do

    String.match?(expression, ~r/^[^=]+ =>/)

  end

end