Deletes lines that have certain text in cell B - Shared with Script Lab

Delete certain lines.yaml

name: Delete certain lines
description: Deletes empty lines and lines that have certain text in cell B representing a row that is not in use
author: Narvey
host: EXCEL
api_set: {}
script:
    content: "$(\"#run\").click(run);\r\n\r\nasync function run()\r\n{\r\n    try\r\n    {\r\n        await Excel.run(async (ctx) =>\r\n        {\r\n            var deleteVal = document.getElementById(\"delete\").value.toLocaleLowerCase()\r\n            var rows = ctx.workbook.worksheets.getActiveWorksheet().getUsedRange().load(\"values\")\r\n            await ctx.sync()\r\n            var rowNum = 0, used = 0, v = \"\"\r\n            for (rowNum = rows.values.length-1; rowNum >= 0; rowNum--)\r\n            {\r\n                v = rows.values[rowNum][1]\r\n                if (v == null || v.length == 0 || v.toLocaleLowerCase() == deleteVal)\r\n                {\r\n                    rows.getRow(rowNum).delete(\"Up\")\r\n                    await ctx.sync()\r\n                }\r\n            }\r\n            await ctx.sync()\r\n        })\r\n    }\r\n    catch (error)\r\n    {\r\n        OfficeHelpers.UI.notify(error)\r\n        OfficeHelpers.Utilities.log(error)\r\n    }\r\n}\r\n"
    language: typescript
template:
    content: "<br><br><!--spacing for message boxes-->\r\n<button id=\"run\" class=\"ms-Button\">\r\n    <span class=\"ms-Button-label\">Run</span>\r\n</button>\r\n<br>\r\n<label>Text to consider empty row:</label>\r\n<input type=\"text\" id=\"delete\" class=\"ms-Text\" value=\"Not in use\" />\r\n<br>\r\n\r\n"
    language: html
style:
    content: "/* Your style goes here */\r\n"
    language: css
libraries: |
    # Office.js
    https://appsforoffice.microsoft.com/lib/1/hosted/office.js

    # CSS Libraries
    office-ui-fabric-js@1.4.0/dist/css/fabric.min.css
    office-ui-fabric-js@1.4.0/dist/css/fabric.components.min.css

    # NPM libraries
    core-js@2.4.1/client/core.min.js
    @microsoft/office-js-helpers@0.7.4/dist/office.helpers.min.js
    jquery@3.1.1

    # IntelliSense: @types/library or node_modules paths or URL to d.ts files
    @types/office-js
    @types/core-js
    @microsoft/office-js-helpers@0.7.4/dist/office.helpers.d.ts
    @types/jquery