Gsap scrollTrigger check if/else

[digitalfrci]

hello here it the code.

 

i may use it for several block, but some time it wont have .staggerInFirst , so there is way to put an if / else to check it this box have staggerInFirst then execute the tl ?

gsap.utils.toArray('.staggerIn').forEach((staggerIn, i) => {

    let tlstaggerIn = gsap.timeline({

        scrollTrigger: {

        trigger: staggerIn,

        start: "top 70%",

        }

    });

 

tlstaggerIn.from(staggerIn.querySelectorAll('.staggerInFirst'), {opacity:0 , duration: 0.5, y:-10})

           .from(staggerIn.querySelectorAll('.staggerInStagger'), {opacity:0 , duration: 0.5, y: 10,  stagger: .25,},)

 

           

        

});

 

[GreenSock]

If I understood correctly:

gsap.utils.toArray('.staggerIn').forEach((staggerIn, i) => {
  let tlstaggerIn = gsap.timeline({
      scrollTrigger: {
        trigger: staggerIn,
        start: "top 70%",
      }
    }),
    first = staggerIn.querySelectorAll('.staggerInFirst');
  if (first.length !== 0) {
    tlstaggerIn.from(first, {opacity:0 , duration: 0.5, y:-10});
  }
  tlstaggerIn.from(staggerIn.querySelectorAll('.staggerInStagger'), {opacity:0 , duration: 0.5, y: 10,  stagger: .25});    
});

Happy tweening!