js怎么给h标签动态添加内容

// 假设你的HTML中有一个<h1>标签，id为"myHeader"
var header = document.getElementById("myHeader");
header.innerHTML = "这是新的标题内容";

var header = document.getElementById("myHeader");
header.textContent = "这是新的标题内容";

var header = document.getElementById("myHeader");
var newText = document.createTextNode("这是新的标题内容");
header.appendChild(newText);

var header = document.getElementById("myHeader");
var dynamicContent = "这是" + someVariable + "的标题内容";
header.innerHTML = dynamicContent;

var header = document.getElementById("myHeader");
header.insertAdjacentHTML('beforeend', '<span>这是新的内容</span>');