如果你想遍历每一行(<tr>)，知道/识别行(<tr>)，并遍历每行(<tr>)的每一列(<td>)，那么这就是要走的路。

var table = document.getElementById("mytab1");
for (var i = 0, row; row = table.rows[i]; i++) {
   //iterate through rows
   //rows would be accessed using the "row" variable assigned in the for loop
   for (var j = 0, col; col = row.cells[j]; j++) {
     //iterate through columns
     //columns would be accessed using the "col" variable assigned in the for loop
   }  
}

如果您只想遍历单元格(<td>)，忽略您所在的行，那么可以这样做。

var table = document.getElementById("mytab1");
for (var i = 0, cell; cell = table.cells[i]; i++) {
     //iterate through cells
     //cells would be accessed using the "cell" variable assigned in the for loop
}

您可以使用. queryselectorall()来选择所有td元素，然后使用. foreach()循环这些元素。它们的值可以用.innerHTML检索:

管理细胞=文档。 细胞. forEach(功能(细胞){ 控制台日志(细胞。innerHTML); }) <table . the name="mytab" id="mytab1"> < tr > < td > col1 Val1 < / td > < td > col2 Val2 < / td > < / tr > < tr > < td > col1 Val3 < / td > < td > col2 Val4 < / td > < / tr > - < table >

如果你只想从一个特定的行中选择列，你可以使用伪类:n -child()来选择一个特定的tr，可选地结合子组合子(>)(如果你有一个表中表):

const细胞=文档。 细胞. forEach(功能(细胞){ 控制台日志(细胞。innerHTML); }) <table . the name="mytab" id="mytab1"> < tr > < td > col1 Val1 < / td > < td > col2 Val2 < / td > < / tr > < tr > < td > col1 Val3 < / td > < td > col2 Val4 < / td > < / tr > - < table >

这是一个使用childNodes和HTMLCollection的不同方法

    <script>
        var tab = document.getElementsByTagName("table")
        for (var val of tab[0].childNodes[1].childNodes.values())
            if (HTMLCollection.prototype.isPrototypeOf(val.children)) {
                for (var i of val.children) {
                    console.log(i.childNodes[0])
                }
            }
    </script>

es6:

const table = document.getElementById('some-table');
const cells = table.getElementsByTagName('td');

for (let cell of cells) {
   // do something with cell here
}

早期版本:

var table = document.getElementById('some-table');
var cells = table.getElementsByTagName('td');
for ( var i in cells ) {
   // do something with cells[i]
}

来源:https://developer.mozilla.org/en-US/docs/Web/API/Element/getElementsByTagName

我将其保留下来，以供将来参考，以便抓取特定的HTML表列并打印结果。

//select what table you want to scrape (is zero based)
//set 0 if there is only one
setTable=0;
//select what column you want to scrape (is zero based)
//in this case I would be scrapping column 2
setColumnToScrape=1;
var table = document.getElementsByTagName("tbody")[setTable];
for (var i = 0, row; row = table.rows[i]; i++) {
  col = row.cells[setColumnToScrape];
  document.write(col.innerHTML + "<br>");
}

这个解决方案对我来说非常有效

var table = document.getElementById("myTable").rows;
var y;
for(i = 0; i < # of rows; i++)
{    for(j = 0; j < # of columns; j++)
     {
         y = table[i].cells;
         //do something with cells in a row
         y[j].innerHTML = "";
     }
}