Question

所以我想从我的node.js后端对我的前端html文件进行更改。我该怎么办？（非常感谢任何带有示例的建议）

这是我想要改变的地方：

router.post('/change', function(req, res){
    console.log(req.body.list);
    //modify html DOM here!!
    //preferably using jQuery
})

Answer 1

您不能以我认为您尝试的方式从节点方面进行修改。您可以将响应发送回客户端，并且在该响应上，您可以触发一个函数（您可以在JQuery中编写），该函数将更改DOM并保存需要在本地存储中更改的内容...这里是一个例子......

//server.js
router.post('/change',function(req,res){

    // the message being sent back will be saved in a localSession variable
    // send back a couple list items to be added to the DOM
    res.send({success: true, message: '<li>New list item number 1</li><li>New list item number 2</li>'});
});

这是前端......

//index.html
//body
<h1>Hello World</h1>
    <ul>
        <li>List item 1</li>
         //li items with class change will be changed on button click
        <li class='change'>List item 2</li>
        <button class="trigger">Trigger Change</button>
    </ul>

<script>

   //if we have data stored in the session variable, then use the data to change the DOM text
    if(window.localStorage.permanentData){
        $('li.change').replaceWith(window.localStorage.permanentData);
    }

    //change DOM function
    function changeDom(){
        //ajax call
         $.ajax({
                  url: 'http://localhost:8080/change',
                  method:'POST',
                  data: {list: "some info"}
                }).done(function(data){
                    //if we have a successful post request ... 
                    if(data.success){
                        //change the DOM &
                        //set the data in local storage to persist upon page request
                        localStorage.setItem("permanentData", data.message);
                        var savedText = localStorage.getItem("permanentData");
                        $('li.change').replaceWith(savedText);

                        return;
                    }
                }).fail(function(){
                   //do nothing ....
                    console.log('failed...');
                    return;
                });
        };

    //trigger change DOM  function
    $('.trigger').click(function(){
        changeDom();
    });

</script>

如何使用node.js更改前端html

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