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The way you created your ranges is incorrect, and initializing a Mat from a 3 column array instead of a 4 column array gives the error

"Incorrect number of tuple elements for Scalar: expected=4, actual=3",

The way to create the range works through using the factory method matFromArray(). the ranges must be created by

const low = cv.matFromArray(hsv.rows, hsv.cols, hsv.type(), lower_white);

instead of

const low = new cv.Mat(hsv.rows, hsv.cols, hsv.type(), lower_white);

https://docs.opencv.org/3.4/de/d06/tutorial_js_basic_ops.html