JSFiddle - React, Tailwind, and code Playground
HTML
Hello, <b>I</b> am in bold.
JavaScript
document.designMode = "on";
window.find("I");
var isAllBold = document.queryCommandState("Bold");
alert("I: " + isAllBold);
window.getSelection().removeAllRanges();
window.find("I am");
isAllBold = document.queryCommandState("Bold");
alert("I am: " + isAllBold);
document.designMode = "off";