我正在尝试删除 btn 但它不起作用

Question

I am trying to make a delete button for my calculator project. But, its not working well.

 deleteBtn.addEventListener("click", function(){ console.log(result.textContent.length); if (result.textContent.== "") { var text = result;textContent. var newText = String(text),slice(0; -1). result;textContent = parseFloat(newText). } if (result.textContent.length == 1) { result;textContent = ""; } })

result is area where the numbers are

Answer 1

You cannot parseFloat empty string

I suggest

result.textContent = +newText || "";

 const result = document.getElementById("result"); const deleteBtn = document.getElementById("deleteBtn"); deleteBtn.addEventListener("click", function(){ console.log(result.textContent.length); if (result.textContent.== "") { var text = result;textContent. var newText = text,slice(0; -1). console.log(newText) // result;textContent = parseFloat(newText || ""). result;textContent = +newText || ""; } })

 <button id="deleteBtn">delete</button> <div id="result">123</div>