{"id":20780188,"url":"https://github.com/xotic750/assert-is-function-x","last_synced_at":"2025-04-30T20:28:29.414Z","repository":{"id":3545351,"uuid":"50129446","full_name":"Xotic750/assert-is-function-x","owner":"Xotic750","description":"If isFunction(callbackfn) is false, throw a TypeError 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 href=\"https://travis-ci.org/Xotic750/assert-is-function-x\"\n  title=\"Travis status\"\u003e\n\u003cimg\n  src=\"https://travis-ci.org/Xotic750/assert-is-function-x.svg?branch=master\"\n  alt=\"Travis status\" height=\"18\"\u003e\n\u003c/a\u003e\n\u003ca\n  href=\"https://david-dm.org/Xotic750/assert-is-function-x\"\n  title=\"Dependency status\"\u003e\n\u003cimg src=\"https://david-dm.org/Xotic750/assert-is-function-x/status.svg\"\n  alt=\"Dependency status\" height=\"18\"/\u003e\n\u003c/a\u003e\n\u003ca\n  href=\"https://david-dm.org/Xotic750/assert-is-function-x?type=dev\"\n  title=\"devDependency status\"\u003e\n\u003cimg src=\"https://david-dm.org/Xotic750/assert-is-function-x/dev-status.svg\"\n  alt=\"devDependency status\" height=\"18\"/\u003e\n\u003c/a\u003e\n\u003ca\n  href=\"https://badge.fury.io/js/assert-is-function-x\"\n  title=\"npm version\"\u003e\n\u003cimg src=\"https://badge.fury.io/js/assert-is-function-x.svg\"\n  alt=\"npm version\" height=\"18\"\u003e\n\u003c/a\u003e\n\u003ca\n  href=\"https://www.jsdelivr.com/package/npm/assert-is-function-x\"\n  title=\"jsDelivr hits\"\u003e\n\u003cimg src=\"https://data.jsdelivr.com/v1/package/npm/assert-is-function-x/badge?style=rounded\"\n  alt=\"jsDelivr hits\" height=\"18\"\u003e\n\u003c/a\u003e\n\u003ca\n  href=\"https://bettercodehub.com/results/Xotic750/assert-is-function-x\"\n  title=\"bettercodehub score\"\u003e\n\u003cimg src=\"https://bettercodehub.com/edge/badge/Xotic750/assert-is-function-x?branch=master\"\n  alt=\"bettercodehub score\" height=\"18\"\u003e\n\u003c/a\u003e\n\u003ca\n  href=\"https://coveralls.io/github/Xotic750/assert-is-function-x?branch=master\"\n  title=\"Coverage Status\"\u003e\n\u003cimg src=\"https://coveralls.io/repos/github/Xotic750/assert-is-function-x/badge.svg?branch=master\"\n  alt=\"Coverage Status\" height=\"18\"\u003e\n\u003c/a\u003e\n\n\u003ca name=\"module_assert-is-function-x\"\u003e\u003c/a\u003e\n\n## assert-is-function-x\n\nIf isFunction(callbackfn) is false, throw a TypeError exception.\n\n\u003ca name=\"exp_module_assert-is-function-x--module.exports\"\u003e\u003c/a\u003e\n\n### `module.exports(callback)` ⇒ \u003ccode\u003e\\*\u003c/code\u003e ⏏\n\nTests `callback` to see if it is a function, throws a `TypeError` if it is\nnot. Otherwise returns the `callback`.\n\n**Kind**: Exported function  \n**Returns**: \u003ccode\u003e\\*\u003c/code\u003e - Returns `callback` if it is function.  \n**Throws**:\n\n- \u003ccode\u003eTypeError\u003c/code\u003e Throws if `callback` is not a function.\n\n| Param     | Type                | Description                   |\n| --------- | ------------------- | ----------------------------- |\n| callback  | \u003ccode\u003e\\*\u003c/code\u003e     | The argument to be tested.    |\n| [message] | \u003ccode\u003estring\u003c/code\u003e | Optional alternative message. |\n\n**Example**\n\n```js\nimport assertIsFunction from 'assert-is-function-x';\n\nconst primitive = true;\nconst mySymbol = Symbol('mySymbol');\nconst symObj = Object(mySymbol);\nconst object = {};\nconst fn = function fn() {};\n\nassertIsFunction(primitive); // TypeError 'true is not a function'.\nassertIsFunction(object); // TypeError '#\u003cObject\u003e is not a function'.\nassertIsFunction(mySymbol); // TypeError 'Symbol(mySymbol) is not a function'.\nassertIsFunction(symObj); // TypeError '#\u003cObject\u003e is not a function'.\nconsole.log(assertIsFunction(fn)); // Returns fn.\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fxotic750%2Fassert-is-function-x","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fxotic750%2Fassert-is-function-x","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fxotic750%2Fassert-is-function-x/lists"}