function _set(k) {
let pos1 = editor.getCursor(); // { line: Infinity }
if (k == "h1") {
editor.replaceRange("# ", pos1);
}

if (k == "h2") {
editor.replaceRange("## ", pos1);
}

if (k == "h3") {
editor.replaceRange("### ", pos1);
}
render();
}

function _setnum(num) {
let pos1 = editor.getCursor();
editor.replaceRange(num, pos1);
render();
}

function _setlink() {
let pos1 = editor.getCursor();
editor.replaceRange("text", pos1);
render();
}
function _setimg() {
let pos1 = editor.getCursor();
editor.replaceRange("", pos1);
render();
}

function _setbold() {
let pos1 = editor.getCursor();
var old = editor.getSelection();
editor.replaceSelection("" + old + "");
render();
}

function _setita() {
let pos1 = editor.getCursor();
var old = editor.getSelection();
editor.replaceSelection("" + old + "");
render();
}

function _setref(k) {
let pos1 = editor.getCursor();
editor.replaceRange("> ", pos1);
render();
}

function _setinlinecode() {
let pos1 = editor.getCursor();
var old = editor.getSelection();
editor.replaceSelection("" + old + "");
render();
}

function _setblockcode() {
let pos1 = editor.getCursor();
var old = editor.getSelection();
editor.replaceSelection(" \n" + old + "\n");
render();
}

function _setunorderlist() {
let pos1 = editor.getCursor();
editor.replaceRange("\n* item 1 \n* item 2 \n* item 3", pos1);
render();
}

function _setorderlist() {
let pos1 = editor.getCursor();
editor.replaceRange("\n1. item 1 \n2. item 2 \n3. item 3", pos1);
render();
}