t_wの輪郭

<h1>pagescript.js</h1>

let debug = false;
debugLog = debug ? console.log.bind(null, "DEBUG: ") : ()=>{};

document.addEventListener("keydown", (event)=>{
  let textareaArray = Array.from(document.querySelectorAll("textarea"));
  debugLog("on keydown");
  textareaArray.map(textarea=>{
    textarea.style.height = "";
    textarea.style.height = textarea.scrollHeight + "px";
    debugLog("change textarea heigth=>",textarea.style.height);
  })
}, false);