从 webWorker 访问 localStorage

WebWorker 可以访问 localStorage 吗？

如果不是为什么不呢？从安全角度来看有问题吗？

Web Worker 只能访问以下内容：

• XMLHttpRequest https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest
• 应用程序缓存 https://developer.mozilla.org/en-US/docs/Web/HTML/Using_the_application_cache
• 创建其他网络工作者
• navigator https://developer.mozilla.org/en-US/docs/Web/API/Navigator object
• location https://developer.mozilla.org/en-US/docs/Web/API/Location object
• setTimeout https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setTimeout method
• clearTimeout https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/clearTimeout method
• setInterval https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setInterval method
• clearInterval https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/clearInterval method
• Performance https://developer.mozilla.org/en-US/docs/Web/API/Performance目的 （mark,measure,now方法：caniuse? https://caniuse.com/#search=Performance)
• IndexedDB https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_APIAPI（参见：caniuse? https://caniuse.com/#search=indexedDB)
• importScripts https://developer.mozilla.org/en-US/docs/Web/API/WorkerGlobalScope/importScripts method
• JSON https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON
• Worker https://developer.mozilla.org/en-US/docs/Web/API/Worker

窗口或父对象无法从 Web Worker 访问，因此您无法访问localStorage.

窗口和窗口之间进行通信workerglobalscope你可以使用postMessage()功能和onmessage event.

访问 DOM 和窗口不是线程安全的，因为子线程将拥有与其父线程相同的权限。