pagetop.js

js ox-tv.co.jp collected 2026-10-02 06:55:31 UTC 359 bytes, 19 lines download raw bytes

1const pageTopBtn = document.getElementById("pageTop");
2
3window.addEventListener("scroll", () => {
4  if (window.scrollY > 200) {
5    pageTopBtn.classList.add("show");
6  } else {
7    pageTopBtn.classList.remove("show");
8  }
9});
10
11pageTopBtn.addEventListener("click", () => {
12  window.scrollTo({
13    top: 0,
14    behavior: "smooth"
15  });
16});
17
18
19

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