我的程序采取**.csv**文件，从它读取信息，并将其发送到js中的HTML表。此外，我有输入字段为未来的行动。它的搜索数据通过过滤器从输入整个表。
问题是，如果表已经生成，我再次单击“提交”，我的表将再次出现并创建副本（如图所示）
问题是如何使其在提交时不复制
.html文件：
<!DOCTYPE html>
<html lang="en">
<head>
<title>Excel Transform Site</title>
<link rel="stylesheet" href="./excel-transfrom.css">
</head>
<body>
<form id="input-form">
<input type="file" id="file-choose" apply=".csv">
<label class="test-input-label">Test Input</label>
<input type="text" id="test-input">
<input type="submit" value="Submit" class="submit-button">
</form><br>
<table id="data-table"></table>
<script src="./excel-transform.js"></script>
</body>
</html>.js文件夹：
const inputForm = document.getElementById("input-form")
const file = document.getElementById("file-choose")
const filterInput = document.getElementById("test-input")
let table = document.createElement("table")
let thead = document.createElement("thead")
let tbody = document.createElement("tbody")
function csvToArray(str, delimiter=',') {
const headers = str.slice(0, str.indexOf("\n")).split(delimiter)
const rows = str.slice(str.indexOf("\n") + 1).split("\n")
headers.pop()
const arr = rows.map((row) => {
const values = row.split(delimiter)
const element = headers.reduce((object, header, index) => {
object[header] = values[index]
return object
}, {})
return element
})
return arr
}
inputForm.addEventListener("submit", (e) => {
e.preventDefault()
const input = file.files[0]
const reader = new FileReader()
reader.onload = function(e) {
const text = e.target.result
const data = csvToArray(text)
table.appendChild(thead)
table.appendChild(tbody)
document.getElementById('data-table').appendChild(table)
let hrow = document.createElement('tr')
for (let i = 0; i < Object.keys(data[0]).length; i++) {
let theader = document.createElement('th')
theader.innerHTML = Object.keys(data[0])[i]
hrow.appendChild(theader)
}
thead.appendChild(hrow)
for (let i = 0; i < data.length; i++) {
let drow = document.createElement('tr')
console.log(data[i])
for (let j = 0; j < Object.values(data[i]).length; j++) {
let tdata = document.createElement('td')
tdata.innerHTML = Object.values(data[i])[j]
drow.appendChild(tdata)
}
tbody.appendChild(drow)
}
}
reader.readAsText(input)
})
1条答案
按热度按时间wnavrhmk1#
Solution is already found
In the comment section
replaceChildrenmethod has been suggested, but I decided to use.innerHTML = ''insteadSo, when submit event is happening, table content erases with
innerHTML = ''if existsHere is how js code looks now: