How to dynamically add cells to a table using JS?

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    Tell me how to write the code for such a task correctly.

    There is a table with inputs by type: https://jsfiddle.net/v9ckyu3w/2/

    Task: when inserting an array, for example [[1,2,3], [1,2,3], [1,2,3]], starting from this input , lines should be added, in the amount = length of array and columns, in number = length of subarrays.

    When pasted into B1, you should get: https://jsfiddle.net/Ltz0s8x5/

    It is desirable that the values ​​from the arrays be inside the created cells. For example, in B1 -1, in C1 - 2, in C3 - 2 ...
    JavaScript Elliott Simmons, May 8, 2020

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