如何将变量引用更改为输入框？

<input type="text" id="inputField">

var inputValue = document.getElementById("inputField").value;

from flask import Flask, request

app = Flask(__name__)

@app.route("/")
def index():
    inputValue = request.form.get("inputField")
    # 其他代码

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MyController {

    @GetMapping("/")
    public String index(@RequestParam("inputField") String inputValue) {
        // 其他代码
    }
}