How do I iterate through table rows and cells in JavaScript?

Answer 1

If you want one with a functional style, like this:

    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"]

You may modify the prototype object of HTMLCollection (allowing to use in a way that resembles extension methods in C#) and embed into it a function that converts collection into array, allowing to use higher order funcions with the above style (kind of linq style in C#):

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