[ANGULAR] Handle show/hide left menu

[kenken9301680]

Sorry, but I am deploying to the product because of that error, I can't build it, so is there any fix

[pmiklashevich]

Have you tried to suppress the errors using @ts-ignore?
https://www.typescriptlang.org/docs/handbook/release-notes/typescript-2-6.html#suppress-errors-in-ts-files-using--ts-ignore-comments

[pmiklashevich]

Reading your code snippet carefully I paid attention you're changing subGridConfigs. This is a config. It is not supposed to be changed dynamically.

And the subGrids getter you can simply replace with the getSubGrid function.

// gantt.subGrids.locked => gantt.getSubGrid('locked')