如何根据CSV文件中的数据更新页面上的数据，而不是使用页面上的固定元素数据？

Question

在代码段之后，Visual Studio 代码中有我尝试的完整代码。

我将在下面留下的这个模型使用两个 <pre> 元素和数据，以便页面每 2 秒刷新一次页面数据，但我希望这样而不是使用带有值的元素，我想使用名为 List_of_Games.csv

的文件中的现有数据每 2 秒刷新一次页面

此文件中的数据每 1 分钟更新一次，它们与 <pre> 元素具有相同的 label,value,market,numbergame 模型。

我该怎么做？我无法为此绘制模型。

let csv1 = d3.csvParse(d3.select("#csv1").remove().text());
    let csv2 = d3.csvParse(d3.select("#csv2").remove().text());
    
    let csv = [csv1, csv2];
    let i = 0;

    
    var select_5 = d3.select("#Lista-de-Jogos-Lateral")
      .append("div")
      .attr("id","select-box-5")
      .style("width","100%")
      .style("max-height","574px");

    function update() {

        let data = csv[i++%2];
            
        let update_5 = select_5.selectAll(".matches")
            .data(data,d=>d.label);
        
        update_5.exit().remove();

        // Enter new divs:
        const enter = update_5.enter()
            .append("div")
            .attr("class","matches")
        
        // Append the children to entered divs:
        enter.append("form")
           .attr("action",d => d.market)
           .attr("target","_blank")
           .style("width","100%")
           .append("input")
           .attr("type","submit")
           .attr("target","_blank")
           .style("width","100%")
           .attr("value","Jogo Betfair");
           
        enter.append("form")
            .append("input")
            .attr("type","text")
            .attr("id",d => "barra-de-texto-para-grafico-" + d.numbergame)
            .style("width","100%")
            .attr("value", d=>d.label);
            
        enter.append("img")
            .attr("type","text")
            .attr("src","https://sitedeapostas-com.imgix.net/assets/local/Company/logos/betfair_logo_transp.png?auto=compress%2Cformat&fit=clip&q=75&w=263&s=c1691b4034fd0c4526d27ffe8b1e839c")
            .attr("name",d => "grafico-betfair-" + d.numbergame);
    }
  
  
  update();
    setInterval(update,2000);

{
    box-sizing: border-box;
    }
    .matches {
    text-align:center;
    float: left;
    width: 355px;
    border: 1px solid white;
    border-collapse: collapse;
    }
    .column {
    text-align:center;
    float: left;
    width: 355px;
    border: 1px solid white;
    border-collapse: collapse;
    }
    .grid {
    float: left;
    width: 1431px;
    }
    .row:after {
    content: "";
    display: table;
    clear: both;
    }
    .button {
    background-color: #33ccff;
    color: black;
    font-weight: bold;
    }
    input[type=submit] {
    background-color: #33ccff;
    color: black;
    font-weight: bold;
    }
    html {
    overflow: scroll;
    overflow-x: hidden;
    }
    ::-webkit-scrollbar {
    width: 0px; /* remove scrollbar space /
    background: transparent; / optional: just make scrollbar invisible /
    }
    / optional: show position indicator in red */
    ::-webkit-scrollbar-thumb {
    background: #FF0000;
    }

<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/7.1.1/d3.min.js"></script>
    <div style="color:white;font-weight:bold;overflow:hidden;overflow-y:scroll;" class="grid games" id="Lista-de-Jogos-Lateral">
    
    <pre id="csv1">label,value,market,numbergame
A,www.siteA.com,www.webA.com,1
B,www.siteB.com,www.webB.com,2
C,www.siteC.com,www.webC.com,3
D,www.siteD.com,www.webD.com,4</pre>
    <pre id="csv2">label,value,market,numbergame
A,www.siteA.com,www.webA.com,1
G,www.siteG.com,www.webG.com,2
C,www.siteC.com,www.webC.com,3
Z,www.siteZ.com,www.webZ.com,4
Y,www.siteY.com,www.webY.com,5</pre>
    

    
    </div>

我尝试在 Visual Studio 代码中以这种方式使用它，但我没有得到积极的反馈：

<html>
    <head>
        <style>
            {
            box-sizing: border-box;
            }
            .matches {
            text-align:center;
            float: left;
            width: 355px;
            border: 1px solid white;
            border-collapse: collapse;
            }
            .column {
            text-align:center;
            float: left;
            width: 355px;
            border: 1px solid white;
            border-collapse: collapse;
            }
            .grid {
            float: left;
            width: 1431px;
            }
            .row:after {
            content: "";
            display: table;
            clear: both;
            }
            .button {
            background-color: #33ccff;
            color: black;
            font-weight: bold;
            }
            input[type=submit] {
            background-color: #33ccff;
            color: black;
            font-weight: bold;
            }
            html {
            overflow: scroll;
            overflow-x: hidden;
            }
            ::-webkit-scrollbar {
            width: 0px; /* remove scrollbar space /
            background: transparent; / optional: just make scrollbar invisible /
            }
            / optional: show position indicator in red */
            ::-webkit-scrollbar-thumb {
            background: #FF0000;
            }
        </style>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/7.1.1/d3.min.js"></script>
        <script src="https://d3js.org/d3.v4.js"></script>
        <script id="auto-update-images">
            let interval_images
            window.addEventListener('DOMContentLoaded', () => {
                interval_images = setInterval(refresh_images, 1000); // refresh every 1 sec
            })
            
            function refresh_images() {
                if (!document.images) return;
                const totalimages = document.querySelectorAll("img").length - 1;
                const lastimages = parseInt(document.getElementsByTagName('img')[totalimages].getAttribute('name').replace("grafico-betfair-", "")) + 1;
                for (let i = 1; i < lastimages; i++) {
                    try {
                        document.images['grafico-betfair-' + i].src = document.getElementById('barra-de-texto-para-grafico-' + i).value;
                    } catch (e) {
                    }
                }
            }
        </script>
        <script id="random-number">
            function generateRandomIntegerInRange(min, max) {
                return Math.floor(Math.random() * (max - min + 1)) + min;
            }
        </script>
    </head>
    <body style="background-color:black;">
        <div style="color:white;font-weight:bold;overflow:hidden;overflow-y:scroll;" class="grid games" id="Lista-de-Jogos-Lateral">
            <script id="script-da-caixa-de-selecao-suspensa-5">
                var select_5 = d3.select("#Lista-de-Jogos-Lateral")
                .append("div")
                .attr("id","select-box-5")
                .style("width","100%")
                .style("max-height","574px");

                function update() {

                    let data = d3.csv("Lista_de_Jogos.csv");
                        
                    let update_5 = select_5.selectAll(".matches")
                        .data(data,d=>d.label);
                    
                    update_5.exit().remove();

                    // Enter new divs:
                    const enter = update_5.enter()
                        .append("div")
                        .attr("class","matches")
                    
                    // Append the children to entered divs:
                    enter.append("form")
                    .attr("action",d => d.market)
                    .attr("target","_blank")
                    .style("width","100%")
                    .append("input")
                    .attr("type","submit")
                    .attr("target","_blank")
                    .style("width","100%")
                    .attr("value","Jogo Betfair");
                    
                    enter.append("form")
                        .append("input")
                        .attr("type","text")
                        .attr("id",d => "barra-de-texto-para-grafico-" + d.numbergame)
                        .style("width","100%")
                        .attr("value", d=>d.label);
                        
                    enter.append("img")
                        .attr("type","text")
                        .attr("src","https://sitedeapostas-com.imgix.net/assets/local/Company/logos/betfair_logo_transp.png?auto=compress%2Cformat&fit=clip&q=75&w=263&s=c1691b4034fd0c4526d27ffe8b1e839c")
                        .attr("name",d => "grafico-betfair-" + d.numbergame);
                }
                
                update();
                    setInterval(update,2000);
            </script>
        </div>
    </body>
</html>

Answer 1

我已经对您的代码进行了一些调整以使其正常工作。

首先，我把所有的scripts标签移到<body>标签的末尾，并按顺序排列。
其次，我将 d3-fetch.js 添加为依赖项并删除了重复的 d3.js 一个。
第三，我禁用了所有自动更新代码，以测试代码并避免变得疯狂。

当我在不使用 Web 服务器的情况下使用浏览器打开 HTML 文件时，对该文件的请求失败，因此代码无法运行。我在 VSCode 中安装了 Live Server，它立即开始工作，能够读取文件并将元素附加到正文中。

我遇到的另一个错误是 Uncaught TypeError: document.getElementsByTagName(...)[totalimages] is undefined，因为它可以读取数据。一旦我可以打开文件，那个错误就消失了。

<html>
    <head>
        <style>
            body {
            box-sizing: border-box;
            }
            .matches {
            text-align:center;
            float: left;
            width: 355px;
            border: 1px solid white;
            border-collapse: collapse;
            }
            .column {
            text-align:center;
            float: left;
            width: 355px;
            border: 1px solid white;
            border-collapse: collapse;
            }
            .grid {
            float: left;
            width: 1431px;
            }
            .row:after {
            content: "";
            display: table;
            clear: both;
            }
            .button {
            background-color: #33ccff;
            color: black;
            font-weight: bold;
            }
            input[type=submit] {
            background-color: #33ccff;
            color: black;
            font-weight: bold;
            }
            html {
            overflow: scroll;
            overflow-x: hidden;
            }
            ::-webkit-scrollbar {
            width: 0px; /* remove scrollbar space /
            background: transparent; / optional: just make scrollbar invisible /
            }
            / optional: show position indicator in red */
            ::-webkit-scrollbar-thumb {
            background: #FF0000;
            }
        </style>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/7.1.1/d3.min.js"></script>
        <script src="https://cdn.jsdelivr.net/npm/d3-fetch@3"></script>
    </head>
    <body style="background-color:black;">
        <div style="color:white;font-weight:bold;overflow:hidden;overflow-y:scroll;" class="grid games" id="Lista-de-Jogos-Lateral">
        </div>
    
        <script id="script-da-caixa-de-selecao-suspensa-5">
            var select_5 = d3.select("#Lista-de-Jogos-Lateral")
            .append("div")
            .attr("id","select-box-5")
            .style("width","100%")
            .style("max-height","574px");

            async function update() {

                let data = await d3.csv("./Lista_de_Jogos.csv");
                console.log("Data from CSV file: ", {data})

                let update_5 = select_5.selectAll(".matches")
                    .data(data,d=>d.label);
                
                update_5.exit().remove();

                // Enter new divs:
                const enter = update_5.enter()
                    .append("div")
                    .attr("class","matches")
                
                // Append the children to entered divs:
                enter.append("form")
                    .attr("action",d => d.market)
                    .attr("target","_blank")
                    .style("width","100%")
                    .append("input")
                    .attr("type","submit")
                    .attr("target","_blank")
                    .style("width","100%")
                    .attr("value","Jogo Betfair");
                
                enter.append("form")
                    .append("input")
                    .attr("type","text")
                    .attr("id",d => "barra-de-texto-para-grafico-" + d.numbergame)
                    .style("width","100%")
                    .attr("value", d=>d.label);
                    
                enter.append("img")
                    .attr("type","text")
                    .attr("src","https://sitedeapostas-com.imgix.net/assets/local/Company/logos/betfair_logo_transp.png?auto=compress%2Cformat&fit=clip&q=75&w=263&s=c1691b4034fd0c4526d27ffe8b1e839c")
                    .attr("name",d => "grafico-betfair-" + d.numbergame);
            }
            
            update();
            console.log("Auto CSV update is disabled!")
            //setInterval(update,2000);
        </script>
        <script id="auto-update-images">
            let interval_images
                window.addEventListener('DOMContentLoaded', () => {
                    console.log("Auto update images is disabled!")
                    interval_images = refresh_images(); //setInterval(refresh_images, 5000); // refresh every 5 sec
                })
                
            function refresh_images() {
                if (!document.images) return;
                const totalimages = document.querySelectorAll("img").length - 1;
                const lastimages = parseInt(document.getElementsByTagName('img')[totalimages].getAttribute('name').replace("grafico-betfair-", "")) + 1;
                for (let i = 1; i < lastimages; i++) {
                    try {
                        document.images['grafico-betfair-' + i].src = document.getElementById('barra-de-texto-para-grafico-' + i).value;
                    } catch (e) {
                    }
                }
            }
        </script>
        <script id="random-number">
            function generateRandomIntegerInRange(min, max) {
                return Math.floor(Math.random() * (max - min + 1)) + min;
            }
        </script>
    </body>
</html>

如果您尝试使用“运行代码片段”按钮运行此代码，它将失败，因为它无法访问 csv 文件。不过，它应该适用于有效数据。您的代码期望通过使用 csv 文件中可用的字段来替换图像 URL，因此请确保您的数据具有这些字段。

如何根据CSV文件中的数据更新页面上的数据，而不是使用页面上的固定元素数据？

How to update data on a page according to data from a CSV file instead of using fixed element data on the page?

html

javascript

csv

d3.js