使用了上面的答案,但根据我的需要进行了更改。
我使用了以下函数并导入到我需要下载 csv 文件的 REACT 文件中。
我的th 元素中有一个span 标签。将 cmets 添加到大多数函数/方法的功能中。
import { tableToCSV, downloadCSV } from './../Helpers/exportToCSV';
export function tableToCSV(){
let tableHeaders = Array.from(document.querySelectorAll('th'))
.map(item => {
// title = splits elem tags on '\n',
// then filter out blank "" that appears in array.
// ex ["Timestamp", "[Full time]", ""]
let title = item.innerText.split("\n").filter(str => (str !== 0)).join(" ")
return title
}).join(",")
const rows = Array.from(document.querySelectorAll('tr'))
.reduce((arr, currRow) => {
// if tr tag contains th tag.
// if null return array.
if (currRow.querySelector('th')) return arr
// concats individual cells into csv format row.
const cells = Array.from(currRow.querySelectorAll('td'))
.map(item => item.innerText)
.join(',')
return arr.concat([cells])
}, [])
return tableHeaders + '\n' + rows.join('\n')
}
export function downloadCSV(csv){
const csvFile = new Blob([csv], { type: 'text/csv' })
const downloadLink = document.createElement('a')
// sets the name for the download file
downloadLink.download = `CSV-${currentDateUSWritten()}.csv`
// sets the url to the window URL created from csv file above
downloadLink.href = window.URL.createObjectURL(csvFile)
// creates link, but does not display it.
downloadLink.style.display = 'none'
// add link to body so click function below works
document.body.appendChild(downloadLink)
downloadLink.click()
}
当用户点击导出到 csv 时,它会在 react 中触发以下功能。
handleExport = (e) => {
e.preventDefault();
const csv = tableToCSV()
return downloadCSV(csv)
}
示例 html 表格元素。
<table id="datatable">
<tbody>
<tr id="tableHeader" className="t-header">
<th>Timestamp
<span className="block">full time</span></th>
<th>current rate
<span className="block">alt view</span>
</th>
<th>Battery Voltage
<span className="block">current voltage
</span>
</th>
<th>Temperature 1
<span className="block">[C]</span>
</th>
<th>Temperature 2
<span className="block">[C]</span>
</th>
<th>Time & Date </th>
</tr>
</tbody>
<tbody>
{this.renderData()}
</tbody>
</table>
</div>