The -observed class not adding

[viterzbayraku]

Hello. I installed your plugin from example:

// utilities
const a = require('@viget/tailwindcss-plugins/utilities/alpha')
const { em, rem, remPair, pxPair } = require('@viget/tailwindcss-plugins/utilities/fns')
const plugins = require('@viget/tailwindcss-plugins')

theme: {

        animate: (theme) => ({
            triggerClass: '-observed',
            staggerDelay: {
              '100': '100ms',
              '200': '200ms',
              ...theme('transitionDelay'),
            },
            staggerInterval: {
              default: '100ms',
              '200': '200ms',
              ...theme('transitionDelay'),
            },
            maxItemIntervalSupport: 9,
            animations: {
              'fade-up': {
                from: {
                  transform: 'translateY(20px)',
                  opacity: 0,
                },
                to: {
                  transform: 'translateY(0)',
                  opacity: 1,
                },
              },
              'zoom-in': {
                from: {
                  transform: 'scale(0.8)',
                  opacity: 0,
                },
                // "to" is optional
              },
            },
          }),       
    },
    plugins: [
        plugins.animate,  
        
    ]

npm dev watch generated files without errors, but after scrolling on the page the element still invisible and -observed extension to element class not adding.