Welcome to the JavaScript feedback portal. We’re happy you’re here! If you have feedback on how to improve the JavaScript, we’d love to hear it!>
Thanks for joining our community and helping improve Syncfusion products!
Collapsing and expanding splitter control does not return to original state unless the splitter was resized first.
Example
https://m4sehy-6ntbho.stackblitz.io/
The left pane is sized to the correct size at the start. When collapsing and then expanding you will see the pane expands to a much larger size than originally set. Once you start to resize the splitter manually, collapsing and expanding will maintain proper size