Function sanitizeURL

docs/external/js/react-dom.development.js:1184–1192

(url)

  var didWarn = false;

  function sanitizeURL(url) {
    {
      if (!didWarn && isJavaScriptProtocol.test(url)) {
        didWarn = true;

        error('A future version of React will block javascript: URLs as a security precaution. ' + 'Use event handlers instead if you can. If you need to generate unsafe HTML try ' + 'using dangerouslySetInnerHTML instead. React was passed %s.', JSON.stringify(url));
      }
    }
  }

  /**
   * Get the value for a property on a node. Only used in DEV for SSR validation.