Node.js+ Express.js 删除请求触发 post 请求

Question

我正在从 Net Ninja 的播放列表中学习 Express.js。代码是用JQuery写的，所以在用ES5写的时候，遇到很多问题。

todoController.js

        // console.log(req.body.todoDraftHead)
        console.log("post")
        if (req.body.todoDraftHead!==undefined){
            oldTodo.push( {id: oldTodo.length+1, head:req.body.todoDraftHead} );
        }
        res.json( oldTodo ) 
    })

    // if use res.render here, as long as click "/todo" post will be occurring
    // if there is one previous POST request which means that
    // req.body!==undefined

    // use res.json() , res.text(), res.send()

    app.delete('/todo/:item', (req, res) => {  
        oldTodo = oldTodo.filter((value) => {
            return (value.head.replace(/ /g, '') !== req.params.item) 
        })
        console.log(oldTodo)
        res.json( oldTodo )
    })

views.html

function deleteNote(event) {
            var target = event.target;
            var sibling = target.previousElementSibling;
            var text = sibling.textContent.replace(/ /g, '');
            fetch(`/todo/${text}`, {
                method: "DELETE",
            })
                .then((response) => {
                    response.json()
                })
                .then((response) => {
                    location.reload();
                })
                .catch((e) => {
                    return e;
                })
        }

每次发生删除请求时，也会触发发布请求。因此，发布请求和删除请求都会影响我的待办事项数组。