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// i am a C# developer
// trying javascript
function toc() {
const tocDiv = document.getElementById("toc");
const content = document.getElementById("main");
const headers = content.querySelectorAll('h1, h2, h3, h4, h5, h6');
console.log(headers)
const ul = document.createElement("ul");
tocDiv.appendChild(ul)
for (var i = 0; i < headers.length; i++) {
if (!headers[i].hasAttribute('id')) {
headers[i].setAttribute('id', `${headers[i].innerHTML.split(" ")[0]}-${i}`)
}
}
for (var i = 0; i < headers.length; i++) {
if (headers[i].hasAttribute('id')) {
const li = document.createElement("li");
var level = headers[i].tagName[1];
console.log(level + headers[i].tagName + headers[i].id)
if (level == 1) {
const a = document.createElement("a");
ul.appendChild(li);
li.appendChild(a);
a.href = "#" + headers[i].id
a.textContent = headers[i].textContent
}
else
{
var nowUl = document.createElement("ul");
ul.appendChild(nowUl);
for (var j = 0; j < level - 2; j++) {
const currentUl = document.createElement("ul");
nowUl.appendChild(currentUl);
nowUl = currentUl;
}
const currentLi = document.createElement("li");
const a = document.createElement("a");
nowUl.appendChild(currentLi);
currentLi.appendChild(a);
a.href = "#" + headers[i].id
a.textContent = headers[i].textContent
}
}
}
}
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