[英]Get contents of the first cell in the clicked column and the first cell of the clicked row in a HTML table
我正在使用以下javascript來獲取單擊的表格單元格中的數據:
var table = document.getElementById('ThisWeek'),
cells = table.getElementsByTagName('td');
for (var i=0,len=cells.length; i<len; i++)
{
cells[i].onclick = function()
{
document.getElementById("txtVal").value = this.innerText;
}
}
我該如何修改這個以便我也可以獲得點擊列中第一個單元格的內容和單擊行中的第一個單元格? 例如,如果我點擊下表中的“s”,我得到結果“2”和“B”作為兩個變量返回:
0 1 2 3
A q w e
B a s d
C z x c
請注意,我需要一個javascript解決方案,而不是jQuery。 理想情況下,我還想點擊第一行和第一列返回空字符串。
此代碼段使用我在評論中提到的屬性:
window.onload = function () {
var table = document.getElementById('table');
table.addEventListener('click', function (e) {
var target = e.target,
col = target.cellIndex,
row;
while (target = target.parentElement) {
if (!col && col !== 0) {
col = target.cellIndex;
}
if (target.tagName.toLowerCase() === 'tr') {
row = target.rowIndex;
break;
}
}
console.log(table.rows[row].cells[0].innerHTML + ', ' + table.rows[0].cells[col].innerHTML);
});
}
我建議:
function index(c){
var i = 0;
while (c.previousSibling){
/* if the previousSibling has a nodeType and that nodeType === 1
(indicating the previousSibling is an element) increment the i variable */
if (c.previousSibling.nodeType && c.previousSibling.nodeType === 1){
i++;
}
// reset c to the previousSibling
c = c.previousSibling;
}
/* i is the count of previous-siblings, and therefore the index
amongst those siblings: */
return i;
}
function getHeaders(e){
/* this is the table element,
e.target is the clicked element */
var el = e.target,
text = 'textContent' in document ? 'textContent' : 'innerText',
headers = [el.parentNode.getElementsByTagName('td')[0][text],this.getElementsByTagName('tr')[0].getElementsByTagName('td')[index(el)][text]];
// set the text of the nextElementSibling of the table:
this.nextElementSibling[text] = headers.join(', ');
}
document.getElementById('table').addEventListener('click', getHeaders);
JS小提琴演示 。
你可以將它添加到你的單元格[i] .onclick函數:
var row = this.parentElement; // TR
var table = row.parentElement.parentElement; // TBODY > TABLE
document.getElementById("columnVal").value = row.rowIndex && this.cellIndex ? table.rows[0].cells[this.cellIndex].innerText : "";
document.getElementById("rowVal").value = row.rowIndex && this.cellIndex ? row.cells[0].innerText : "";
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