How to Disable Lightning Component Cache in Salesforce?

When building Lightning Components in Salesforce Lightning Experience, developers often encounter a situation where the changes made to their component files — especially the JavaScript controller or helper files like custom_componentController.js or custom_componentHelper.js — don’t immediately show up after saving and reloading the page. You might have noticed that even after performing a normal refresh, the browser still displays the older version of the component. Usually, it takes two hard refreshes (Ctrl + Shift + R or Command + Shift + R) to force Salesforce to reload the updated files. This happens because of Salesforce’s client-side caching system, which is designed to enhance performance but can interfere with active development.

Understanding why this happens

Salesforce Lightning Experience uses Locker Service and secure browser caching to improve page load performance. When you open a Lightning page, Salesforce caches the component’s metadata and static resources (like JavaScript, CSS, and HTML) in your browser. This allows pages to load faster since they don’t have to re-download every file from the Salesforce server every time you open a component.

However, this optimization can be inconvenient during development because Salesforce keeps serving the cached version of your component, even after you deploy changes to the JavaScript controller or helper file. This behavior makes it seem like your edits are not being applied — but in reality, the browser is simply loading the older cached version.

The recommended solution

Salesforce provides a setting that controls whether client-side caching is enabled or not. To ensure that your Lightning Component changes appear immediately, you can disable this caching feature while you are developing. This is an org-level configuration and applies to all users in the environment.

Here’s how you can disable caching in your org:

1. Go to Setup in Salesforce.
2. In the Quick Find box, type Session Settings and click on it.
3. Scroll down to the Caching section.
4. Uncheck the option that says Enable secure and persistent browser caching to improve performance.
5. Click Save.

Once this option is turned off, Salesforce will no longer instruct browsers to cache Lightning Component files persistently. This means that each time you refresh your browser, Salesforce will fetch the newest version of your JavaScript controller, helper, and component markup files directly from the server.

Important note about performance

Disabling this setting should only be done in a sandbox or developer environment, not in production. When caching is turned off, every user request will reload all Lightning resources from the server instead of using cached versions. This can cause slower page loads and degraded performance for your entire organization. Salesforce has specifically designed this setting to improve user experience in production, so turning it off in that environment can negatively impact speed.

Alternative options for developers

If you prefer not to disable caching org-wide, there are a few other workarounds:

1. Use incognito mode:
Open Salesforce in a private/incognito window to ensure there’s no browser caching. Every time you close and reopen the window, it fetches the latest files.

2. Clear browser cache manually:
If you suspect an outdated file is still being served, clear your browser cache manually or press Ctrl + Shift + R (Windows) or Command + Shift + R (Mac) to force a full reload.

3. Use different browsers or profiles:
When testing, switching between browsers or browser profiles can sometimes help load the latest component versions, since each browser maintains its own cache.

Summary

Salesforce Lightning Components use browser caching to enhance performance by reusing previously loaded resources. During development, this can make debugging frustrating because changes don’t appear instantly. The most reliable way to “break” or bypass this cache is to disable the secure and persistent browser caching option in Session Settings. However, do this only in non-production environments to avoid impacting performance for all users.

By managing caching settings carefully — disabling it for development and enabling it again for deployment — you can maintain both a smooth development experience and fast performance for your end users.

Job-Oriented Salesforce Training with 100% Money Back Assurance

Our Salesforce Course is structured to provide a comprehensive understanding of the Salesforce platform, equipping you with the essential skills needed to excel in the CRM industry. The program covers important modules like Salesforce Admin, Developer, and AI, seamlessly integrating theoretical concepts with hands-on application. Through practical assignments and real-world projects, you will develop the expertise to solve complex business challenges using Salesforce solutions. Our experienced instructors ensure that you gain both technical proficiency and industry-relevant insights to succeed in the Salesforce ecosystem.

Beyond technical expertise, our Salesforce training in Hyderabad includes personalized mentoring, certification preparation, and interview coaching to enhance your career opportunities. You’ll have access to extensive study materials, live project exposure, and dedicated support throughout your learning journey. By the end of the course, you will be fully prepared for certification exams and possess the real-world skills that employers seek. Start your Salesforce career with us and explore limitless career possibilities. Sign up for a Free Demo today!