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>");
}

如果你想要一个函数式的样式，像这样:

    const table = document.getElementById("mytab1");
    const cells = table.rows.toArray()
                  .flatMap(row => row.cells.toArray())
                  .map(cell => cell.innerHTML); //["col1 Val1", "col2 Val2", "col1 Val3", "col2 Val4"]

你可以修改HTMLCollection的原型对象(允许以类似于c#中的扩展方法的方式使用)，并嵌入一个将集合转换为数组的函数，允许使用具有上述风格的高阶函数(类似于c#中的linq风格):

    Object.defineProperty(HTMLCollection.prototype, "toArray", {
        value: function toArray() {
            return Array.prototype.slice.call(this, 0);
        },
        writable: true,
        configurable: true
    });

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 >

我的解决方案，使用es6:

var table = document.getElementById('mytab1');

var data = [...table.rows].map(row => [...row.cells].map(td => td.innerText));

console.log(data)

引用: https://developer.mozilla.org/pt-BR/docs/Web/API/HTMLCollection

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>");
}