What is the reason for browsers retaining old code in Symfony 4?

My Symfony 4 app sometimes fails to refresh changes made to the code in the browser, which can be quite frustrating.

For example,

When I modify a class from col-md-5 to col-md-3, and then refresh the page, it still shows as col-md-5. This behavior seems unusual.

A similar issue occurs with CSS. Changing width: 50%; to 10%, refreshing the page, and finding that the width remains at 50%.

To force a change to display, I have to make additional modifications to the code or add text before refreshing the page. Clearing the cache in Symfony also resolves the issue temporarily.

This is a standard Symfony 4 application running in dev mode with disabled Twig caching. Can anyone identify the root cause of this problem?

htmlcsssymfonycaching

Answer №1

The issue arises from the caching system. When the browser fails to detect significant modifications, it will retain the "previous version". To address this, make sure to save in PHPStorm (or your preferred text editor) by using Ctrl+S. If the changes do not reflect, you can refresh your browser without cache by pressing CTRL+R.

If your application is live and the alterations are still not visible, consider clearing the cache. In Symfony, you can utilize the following command:

php bin/console cache:clear

Alternatively, you can use the alias:

bin/console c:c

I trust that this information proves helpful. Do not hesitate to inquire if you require further clarification.

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