IDやcLAssで見た目を変更しよう

<p id="test">JabaScript勉強中だよ！</p>

<style type="text/css">
#test{ color: red; }]
</style>

<script>

console.log(document.getElementById("test"));

</script>

<script>
document.getElementById("test").textContent = "textContentでHTMLを書き換えています";
</script>