PerformanceObserver 🧪

金丝雀发布 🧪

此 API 目前仅在 React Native 的 Canary 和 Experimental 渠道中可用。

¥This API is currently only available in React Native’s Canary and Experimental channels.

如果你想尝试，请在你的应用中使用启用 Canary 版本通道。

¥If you want to try it out, please enable the Canary Channel in your app.

全局 PerformanceObserver 类，如 Web 规范中定义。

¥The global PerformanceObserver class, as defined in Web specifications.

示例

¥Example

ts
const observer = new PerformanceObserver(
  (list, observer, options) => {
    for (const entry of list.getEntries()) {
      console.log(
        'Received entry with type',
        entry.entryType,
        'and name',
        entry.name,
        'that started at',
        entry.startTime,
        'and took',
        entry.duration,
        'ms',
      );
    }
  },
);

observer.observe({entryTypes: ['mark', 'measure']});