Hooks in svelte component? (not really a typhon question but nowhere else to ask :)

Hooks.on('renderChatMessage', doSomething);

<script>
  function catchRolls(message, html) {
    console.log("catchRolls");
  }

  function clickTargetButton() {
    contest.toggle();
    console.log("isContest", $contest);
    Hooks.off("renderChatMessage", catchRolls);
    Hooks.on("renderChatMessage", catchRolls);
  }
</script>
<template>
TargetButton(targetCallback="{clickTargetButton}")