如果单击时为空，如何设置输入值为1

// HTML
<input type="text" id="inputField">
<button id="submitButton">Submit</button>

// JavaScript
document.getElementById("submitButton").addEventListener("click", function() {
  var inputField = document.getElementById("inputField");
  if (inputField.value === "") {
    inputField.value = "1";
  }
});

// Node.js with Express
const express = require("express");
const app = express();

app.post("/submit", function(req, res) {
  var inputValue = req.body.inputValue;
  if (inputValue === "") {
    inputValue = "1";
  }
  // Handle the rest of the logic
});

app.listen(3000, function() {
  console.log("Server is running on port 3000");
});

INSERT INTO table_name (column1) VALUES (IFNULL(input_value, 1));