[英]How to insert data in HTML table from javascript?
我正在創建一個記錄數據的 chrome 擴展。 我有一個 html 表格草稿,我終於想出了如何讓它顯示在一個 csv 文件中。 但是,我一直在想辦法讓諸如 url 之類的數據顯示在表格中。 我已經在我的 js 文件中獲取了 url,我很好奇如何將它插入到表中。
彈出窗口.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>
Activity Logger
</title>
<style>
*{
color:#2b2b2b;
font-family: "Roboto Condensed";
}
table{ width:40%;}
th{ text-align:left; color:#4679bd}
tbody > tr:nth-of-type(even) { background-color:#daeaff;)
button( cursor:pointer; margin-top:1rem;)
</style>
</head>
<body>
<!--<button> Log site </button>-->
<script src="popup.js" charset="utf-8"></script>
<h2>Activity Logger</h2>
<table>
<tr>
<th>Timestamp</th>
<th>Browser</th>
<th>URL</th>
<th>Url</th>
<th>Protocol</th>
<th>Downloaded File Name</th>
<th>Description</th>
</tr>
<tr>
<td>Google</td>
<td>Google</td>
<td>Google</td>
</tr>
<tr>
<td>example</td>
<td>example</td>
<td>example</td>
</tr>
<tr>
<td>example</td>
<td>example</td>
<td>example</td>
</tr>
</table>
<a id="click-this" type= "button" onClick="exportTableToCSV('members.csv')">
<u> Save as CSV </u>
</a>
</body>
</html>
清單文件
{
//Required naming
"name" : "Activity logger",
"version": "1.0",
"manifest_version": 2,
"description": "This support includes the development of a Chrome Browser Activity Logger.",
"content_scripts": [
{
"matches": ["<all_urls>"],
"js": ["content.js", "popup.js"]
}
],
"browser_action": {
"default_icon": "act.png",
"default_title": "Activity",
"default_icon": "act.png",
"default_popup": "popup.html"
},
"background": {
"scripts": ["background.js"]
},
"permissions": ["tabs", "storage"]
}
內容.js
const re = new RegExp('bear', 'gi')
const matches = document.documentElement.innerHTML.match(re) || []
chrome.runtime.sendMessage({
url: window.location.href,
count: matches.length
})
彈出窗口.js
//loading div element url on page
document.addEventListener('DOMContentLoaded', function () {
const bg = chrome.extension.getBackgroundPage()
Object.keys(bg.bears).forEach(function (url) {
const div = document.createElement('div')
div.textContent = `${url}`
document.body.appendChild(div)
})
}, false)
document.addEventListener('DOMContentLoaded', function() {
document.getElementById("click-this").addEventListener("click", exportTableToCSV);
});
function downloadCSV(csv, filename) {
var csvFile;
var downloadLink;
csvFile = new Blob([csv], {type:"text/csv"});
downloadLink = document.createElement("a");
downloadLink.download = filename;
downloadLink.href = window.URL.createObjectURL(csvFile);
downloadLink.style.display = "none";
document.body.appendChild(downloadLink);
downloadLink.click();
}
function exportTableToCSV(filename) {
var csv = [];
var rows = document.querySelectorAll("table tr");
for(var i = 0; i < rows.length; i++) {
var row = [], cols = rows[i].querySelectorAll("td, th");
for(var j=0; j < cols.length; j++)
row.push(cols[j].innerText);
csv.push(row.join(","));
}
//download csv file
downloadCSV(csv.join("\n"), filename);
}
背景.js
window.bears = {}
chrome.runtime.onMessage.addListener(function (request, sender, sendResponse) {
window.bears[request.url] = request.count
})
//create items shown in html file
chrome.browserAction.onClicked.addListener(function (tab) {
chrome.tabs.create({url: 'popup.html'})
})
在你的 HTML 代碼中,當你創建你的表格時,給它一個id
這樣你就可以在你的 Javascript 中輕松引用它,例如
<table id='myLogTable'>
...
</table>
然后,您可以在 Javascript 中獲取對它的引用,例如dataTable = document.getElementById('myLogTable')
。
要在表格中添加行,一種快速而骯臟的方法是將額外的 HTML 寫入table
元素的內容:
dataTable.innerHTML += "<tr><td>Some</td><td>test</td><td>data</td></tr>"
更健壯的方法是使用document.createElement()
和Node.appendChild()
方法構建一行數據並將其附加到表中。 這需要更多的代碼,但如果您執行諸如向表元素添加事件偵聽器之類的操作,則不太可能破壞事物。
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