Thanks for awnswer!
But I think that's a problem with the Angular because I made a blank project only with code for test:
gsap.from('nav a', { opacity: 0, duration: 1, stagger: .5 });
I'm not using any 'ease', I just use the default of gsap Object...
I made some tests and only works in mode AoE of ng cli when I add the lib in angular.json file of scrips globals.
"scripts": [
"./node_modules/gsap/gsap-core.js"
],