在Chrome 35更新中，下载属性行为发生改变。

https://code.google.com/p/chromium/issues/detail?id=373182

要在chrome中工作，使用这个

var pom = document.createElement('a');
var csvContent=csv; //here we load our csv data 
var blob = new Blob([csvContent],{type: 'text/csv;charset=utf-8;'});
var url = URL.createObjectURL(blob);
pom.href = url;
pom.setAttribute('download', 'foo.csv');
pom.click();

我来这里是为了寻求更多的RFC 4180遵从性，但我没有找到一个实现，所以我根据自己的需要做了一个(可能效率很低)实现。我想跟大家分享一下。

var content = [['1st title', '2nd title', '3rd title', 'another title'], ['a a a', 'bb\nb', 'cc,c', 'dd"d'], ['www', 'xxx', 'yyy', 'zzz']];

var finalVal = '';

for (var i = 0; i < content.length; i++) {
    var value = content[i];

    for (var j = 0; j < value.length; j++) {
        var innerValue =  value[j]===null?'':value[j].toString();
        var result = innerValue.replace(/"/g, '""');
        if (result.search(/("|,|\n)/g) >= 0)
            result = '"' + result + '"';
        if (j > 0)
            finalVal += ',';
        finalVal += result;
    }

    finalVal += '\n';
}

console.log(finalVal);

var download = document.getElementById('download');
download.setAttribute('href', 'data:text/csv;charset=utf-8,' + encodeURIComponent(finalVal));
download.setAttribute('download', 'test.csv');

希望这能在未来帮助到一些人。这结合了CSV的编码和下载文件的能力。在jsfiddle的例子中。您可以下载该文件(假设HTML 5浏览器)或在控制台中查看输出。

更新:

Chrome现在似乎已经失去了命名文件的能力。我不确定发生了什么或如何修复它，但每当我使用这段代码(包括jsfiddle)时，下载的文件现在被命名为download.csv。

下面是一个Angular友好的版本:

  constructor(private location: Location, private renderer: Renderer2) {}

  download(content, fileName, mimeType) {

    const a = this.renderer.createElement('a');

    mimeType = mimeType || 'application/octet-stream';

    if (navigator.msSaveBlob) {

      navigator.msSaveBlob(new Blob([content], {
        type: mimeType
      }), fileName);
    }
    else if (URL && 'download' in a) {

      const id = GetUniqueID();

      this.renderer.setAttribute(a, 'id', id);
      this.renderer.setAttribute(a, 'href', URL.createObjectURL(new Blob([content], {
        type: mimeType
      })));

      this.renderer.setAttribute(a, 'download', fileName);

      this.renderer.appendChild(document.body, a);

      const anchor = this.renderer.selectRootElement(`#${id}`);

      anchor.click();

      this.renderer.removeChild(document.body, a);
    }
    else {
      this.location.go(`data:application/octet-stream,${encodeURIComponent(content)}`);
    }
  };

下载CSV文件

  let csvContent = "data:text/csv;charset=utf-8,";
  rows.forEach(function (rowArray) {
    for (var i = 0, len = rowArray.length; i < len; i++) {
      if (typeof (rowArray[i]) == 'string')
        rowArray[i] = rowArray[i].replace(/<(?:.|\n)*?>/gm, '');
      rowArray[i] = rowArray[i].replace(/,/g, '');
    }

    let row = rowArray.join(",");
    csvContent += row + "\r\n"; // add carriage return
  });
  var encodedUri = encodeURI(csvContent);
  var link = document.createElement("a");
  link.setAttribute("href", encodedUri);
  link.setAttribute("download", "fileName.csv");
  document.body.appendChild(link);
  link.click();

下面是一个原生的js解决方案。

function export2csv() { let data = ""; const tableData = []; const rows = [ ['111', '222', '333'], ['aaa', 'bbb', 'ccc'], ['AAA', 'BBB', 'CCC'] ]; for (const row of rows) { const rowData = []; for (const column of row) { rowData.push(column); } tableData.push(rowData.join(",")); } data += tableData.join("\n"); const a = document.createElement("a"); a.href = URL.createObjectURL(new Blob([data], { type: "text/csv" })); a.setAttribute("download", "data.csv"); document.body.appendChild(a); a.click(); document.body.removeChild(a); } <button onclick="export2csv()">Export array to csv file</button>

用csv数据创建一个blob。ie var blob = new blob ([data]， type:"text/csv");

如果浏览器支持保存blob，即如果window.navigator. msaveoropenblob)===true，则使用:window.navigator保存csv数据。“filename.csv”msSaveBlob (blob)

如果浏览器不支持保存和打开blob，则将csv数据保存为:

var downloadLink = document.createElement('<a></a>');
downloadLink.attr('href', window.URL.createObjectURL(blob));
downloadLink.attr('download', filename);
downloadLink.attr('target', '_blank');
document.body.append(downloadLink);

完整代码片段:

var filename = 'data_'+(new Date()).getTime()+'.csv';
var charset = "utf-8";
var blob = new Blob([data], {
     type: "text/csv;charset="+ charset + ";"
});
if (window.navigator.msSaveOrOpenBlob) {
     window.navigator.msSaveBlob(blob, filename);
} else {
    var downloadLink = document.element('<a></a>');
    downloadLink.attr('href', window.URL.createObjectURL(blob));
    downloadLink.attr('download', filename);
    downloadLink.attr('target', '_blank');  
    document.body.append(downloadLink); 
    downloadLink[0].click(); 
}