Function assertValidDirectiveName

test/angular/1.6/angular.js:8269–8279

(name)

  }

  function assertValidDirectiveName(name) {
    var letter = name.charAt(0);
    if (!letter || letter !== lowercase(letter)) {
      throw $compileMinErr('baddir', 'Directive/Component name \'{0}\' is invalid. The first character must be a lowercase letter', name);
    }
    if (name !== name.trim()) {
      throw $compileMinErr('baddir',
            'Directive/Component name \'{0}\' is invalid. The name should not contain leading or trailing whitespaces',
            name);
    }
  }

  function getDirectiveRequire(directive) {
    var require = directive.require || (directive.controller && directive.name);