Function assertValidName

src/polyfills/custom-elements.js:54–58

* Asserts that the custom element name conforms to the spec. * * @param {!typeof SyntaxError} SyntaxError * @param {string} name

(SyntaxError, name)

 * @param {string} name
 */
function assertValidName(SyntaxError, name) {
  if (!VALID_NAME.test(name) || INVALID_NAMES.includes(name)) {
    throw new SyntaxError(`invalid custom element name "${name}"`);
  }
}

/**
 * Does win have a full Custom Elements registry?