Google Apps Script code to hide a row when a checkbox is checked.

checkAndHide.gs

/*
 * Copyright 2019 Google LLC.
 * SPDX-License-Identifier: Apache-2.0
 */

var CHECKBOX_COLUMN = 'B';

function onEdit() {
  var range = SpreadsheetApp.getActiveRange();
  if (range.getA1Notation().split(/\d/)[0] == CHECKBOX_COLUMN &&
     range.getValue() === true) {
    var dv = range.getDataValidation();
    if (dv && dv.getCriteriaType() == SpreadsheetApp.DataValidationCriteria.CHECKBOX) {
      range.getSheet().hideRow(range);
    }
  }
}