Problem with fullpage.js?

Question

JavaScript

i have this code

jQuery(document).ready(function ($) {
  $("#fullpage").fullpage({
    easingcss3: "cubic-bezier(0.645, 0.045, 0.355, 1)",
    scrollingSpeed: 1e3,
    anchors: ["Главная", "Обо мне"],
    navigation: !0,
    navigationPosition: "left",
    animateAnchor: !1,
    onLeave: function (index, nextIndex, direction) {
      if (1 == index) anime({ targets: ".scrollDown", translateY: "180%", duration: 500, easing: "easeInOutCubic" })
      if (1 == nextIndex) anime({ targets: ".scrollDown", translateY: ["180%", 0], duration: 500, easing: "easeInOutCubic" })
                        if (0 == state) {
        var nextClass = ".fp-section-" + nextIndex
        anime
          .timeline()
          .add({ targets: nextClass + " .image", scale: [0.85, 1], translateX: ["10%", 0], translateZ: 0, easing: "easeOutCubic", duration: 1500, delay: 500 })
          .add({
            targets: nextClass + " .image__cover",
            translateX: [0, "110%"],
            translateZ: 0,
            easing: "easeInOutQuart",
            duration: function (el, i) {
              return 1200 - 200 * i
            },
            offset: "-=1700",
          })
          .add({ targets: nextClass + " .page-num p", translateY: ["100%", 0], translateZ: 0, easing: "easeInOutCubic", duration: 1e3, offset: "-=1200" })
          .add({
            targets: nextClass + " .js-letter",
            translateX: ["-105%", 0],
            translateZ: 0,
            easing: "easeInOutCubic",
            duration: 800,
            delay: function (el, i) {
              return 50 * i
            },
            offset: "-=1500",
          })
        if (1 == index)
          anime({
            targets: ".js-moon",
            translateX: [0, "100%"],
            translateZ: 0,
            opacity: [1, 0],
            easing: "easeOutCubic",
            duration: 800,
            delay: function (el, i) {
              return 50 * i
            },
          })
        if (1 == nextIndex)
          anime({
            targets: ".js-moon",
            translateX: ["100%", 0],
            translateZ: 0,
            opacity: [0, 1],
            easing: "easeOutCubic",
            duration: 800,
            delay: function (el, i) {
              return 500 + 50 * i
            },
          })
      }
    },
    afterLoad: function (anchorLink, index) {},
    afterRender: function () {
      $(".section").each(function (i) {
        var num = i + 1
        $(this).addClass("fp-section-" + num)
      })
    },
  })
})

And the error
Uncaught ReferenceError: state is not defined
at a.fn.init.onLeave (index.js:31)
at scrollPage (jquery.fullPage.js:1396)
at moveSectionDown (jquery.fullPage.js:394)
at scrolling (jquery.fullPage.js:1079)
at HTMLDocument.MouseWheelHandler (jquery.fullPage.js:1252)
index.js:31 is this line I don't understand what is the problem...
if (0 == state) {