Function handleHotUpdate

packages/vite/src/node/plugins/dev/markdown-dev.ts:149–200

(context)

      }
    },
    async handleHotUpdate(context) {
      const toReturnModules: ModuleNode[] = [];
      for (let module of context.modules) {
        const fileId = path.normalize(module.file);
        const fileBasename = path.basename(fileId);

        if (page.pageCtx.filePath === fileId) {
          /**
           * If the pageCtx is equal to the fileId then check if the components have changed,
           * If the components have not changed then just re request the page and update it using million.js
           * Else reload the entire page to remove the previous module from the HMR system
           */
          const [, meta] = await compile(
            await fs.readFile(page.pageCtx.filePath, { encoding: "utf-8" })
          );
          const newHash = hashIt({
            components: meta.components,
            head: meta.head,
          });
          if (newHash !== page.prevHash) {
            reload(fileBasename, context.server, utils.logger);
            seen = [];
            return;
          }

          utils.logger.info(`Page reload ${fileBasename}`, {
            timestamp: true,
            clear: true,
          });

          context.server.ws.send({
            type: "custom",
            event: "new:page",
          });
          return;
        } else if (page.reloads.includes(fileId)) {
          /**
           * Reload the page. (mainly for handling the loader and layout files)
           */
          if (/\.[tj]sx?$/.test(fileId)) {
            // time to throw away the fileToURL cache entry for this thing and re-import this file.
            purgeLoaderCache(fileId);
          }
          reload(fileBasename, context.server, utils.logger);
          seen = [];
          return;
        } else {
          toReturnModules.push(module);
        }
      }
      return toReturnModules;
    },
  };
}