StackOverflow answer

package.json

{
    "scripts": {
        "build": "browserify index.js > bundle.js"
    },
    "browserify-shim": {
        "./sorts/tablesort.date.js": {
            "depends": "tablesort:Tablesort"
        }
    },
    "browserify": {
        "transform": ["browserify-shim"]
    },
    "dependencies": {
        "tablesort": "*",
        "browserify": "*",
        "browserify-shim": "*"
    }
}