react-on-rails/lib/isRenderFunction.js

react-on-rails JavaScript for react_on_rails Ruby gem

/**
 * Used to determine whether we'll call React.createElement on the component or if this is a
 * Render-Function used to return a function that takes props to return a React element
 * @param component
 * @returns {boolean}
 */
export default function isRenderFunction(component) {
    if (typeof component !== 'function') {
        return false;
    }
    const callableComponent = component;
    // No for es5 or es6 React Component
    // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
    if (callableComponent.prototype?.isReactComponent) {
        return false;
    }
    if (callableComponent.renderFunction) {
        return true;
    }
    // If zero or one args, then we know that this is a regular function that will
    // return a React component
    if (callableComponent.length >= 2) {
        return true;
    }
    return false;
}
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