Include JavaScript code from Static Resources
Impact area
Manageability
Severity
Medium
Affected element
Apex Page
Rule ID
SF-0134
Impact
Directly importing css and javascript files without using static resources increases load times.
Remediation
Use static resources to serve JavaScript files, as well as images, CSS, and other non-changing files. JavaScript and other assets served this way benefit from the caching and content distribution network (CDN) built into Salesforce.
Time to fix
30 min
References
See the Salesforce documentation article: Visualforce Performance: Best Practices > Optimizing JavaScript.