javascript - What is the storage limit for a service worker?

Question

Most of the browsers provide localStorage with the storage limit of 5MB per domain. Are there such memory limits/constraints with respect to service workers?

I know that web workers (on which service workers are based) don't have such limitations. But Web Workers are not exactly used for assets caching, instead they're used more for processing (so CPU is the main concern there).

If there's no limit on the memory size, could a badly designed website crash the browser?

Answer 1

Update Jan 15 2018

The StorageManager interface of Storage API is becoming a standard for all storage related api queries. As mentioned by @miguel-lattuada, the estimate API would provide an estimate of the storage used a web app the available storage. Also, note the QuotaExceededError exception which would help us in handling error scenarios.

eg code:

if ('storage' in navigator && 'estimate' in navigator.storage) {
  navigator.storage.estimate().then(({usage, quota}) => {
    console.log(`Using ${usage} out of ${quota} bytes.`);
  }).catch(error => {
    console.error('Loading storage estimate failed:');
    console.log(error.stack);
  });
} else {
  console.error('navigator.storage.estimate API unavailable.');
}