Function _renderClassBody

lib/assets/javascripts/JSXTransformer.js:13850–13932

* @param {function} traverse * @param {object} node * @param {array} path * @param {object} state

(traverse, node, path, state)

 * @param {object} state
 */
function _renderClassBody(traverse, node, path, state) {
  var className = state.className;
  var superClass = state.superClass;

  // Set up prototype of constructor on same line as `extends` for line-number
  // preservation. This relies on function-hoisting if a constructor function is
  // defined in the class body.
  if (superClass.name) {
    // If the super class is an expression, we need to memoize the output of the
    // expression into the generated class name variable and use that to refer
    // to the super class going forward. Example:
    //
    //   class Foo extends mixin(Bar, Baz) {}
    //     --transforms to--
    //   function Foo() {} var ____Class0Blah = mixin(Bar, Baz);
    if (superClass.expression !== null) {
      utils.append(
        'var ' + superClass.name + '=' + superClass.expression + ';',
        state
      );
    }

    var keyName = superClass.name + '____Key';
    var keyNameDeclarator = '';
    if (!utils.identWithinLexicalScope(keyName, state)) {
      keyNameDeclarator = 'var ';
      declareIdentInLocalScope(keyName, initScopeMetadata(node), state);
    }
    utils.append(
      'for(' + keyNameDeclarator + keyName + ' in ' + superClass.name + '){' +
        'if(' + superClass.name + '.hasOwnProperty(' + keyName + ')){' +
          className + '[' + keyName + ']=' +
            superClass.name + '[' + keyName + '];' +
        '}' +
      '}',
      state
    );

    var superProtoIdentStr = SUPER_PROTO_IDENT_PREFIX + superClass.name;
    if (!utils.identWithinLexicalScope(superProtoIdentStr, state)) {
      utils.append(
        'var ' + superProtoIdentStr + '=' + superClass.name + '===null?' +
        'null:' + superClass.name + '.prototype;',
        state
      );
      declareIdentInLocalScope(superProtoIdentStr, initScopeMetadata(node), state);
    }

    utils.append(
      className + '.prototype=Object.create(' + superProtoIdentStr + ');',
      state
    );
    utils.append(
      className + '.prototype.constructor=' + className + ';',
      state
    );
    utils.append(
      className + '.__superConstructor__=' + superClass.name + ';',