dts-gen Oops! Looks like there's an issue - jQuery is not defined

Currently, I am in the process of creating the definition file for jquery-colorbox. To achieve this, I am running the following command from the root of my project:

dts-gen -m jquery-colorbox

Unfortunately, this command is failing with the following error:

Unexpected crash! Please log a bug with the commandline you specified.
/usr/local/lib/node_modules/dts-gen/bin/lib/run.js:130
        throw e;
        ^

ReferenceError: jQuery is not defined
    at Object.<anonymous> (/home/adr/Projects/albums/node_modules/jquery-colorbox/jquery.colorbox.js:1105:3)
    at Module._compile (module.js:653:30)
    at Object.Module._extensions..js (module.js:664:10)
    at Module.load (module.js:566:32)
    at tryModuleLoad (module.js:506:12)
    at Function.Module._load (module.js:498:3)
    at Module.require (module.js:597:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/usr/local/lib/node_modules/dts-gen/bin/lib/run.js:57:67)
    at Module._compile (module.js:653:30)

I do have both jQuery and other necessary libraries installed globally and locally. How can I instruct dts-gen to recognize and utilize jQuery?

jquerytypescript

Answer №1

An issue arises with dts-gen because it requires loading the specified module to examine its structure. However, jquery-colorbox relies on jQuery, document, and window being defined globally, which is not the case in Node.js. One potential solution is to utilize dts-gen's experimental feature for browser-based declaration generation. Another option is to incorporate a Node.js-compatible DOM implementation like jsdom and set the necessary global variables to successfully load jquery-colorbox. For example, by creating a file named jquery-colorbox-wrapper.js with the following contents:

var jsdom = require("jsdom");
const { JSDOM } = jsdom;
const { window } = new JSDOM();
const { document } = (new JSDOM('')).window;
global.jQuery = require('jquery')(window);
global.document = document;
global.window = window;
require("jquery-colorbox");

After running 

dts-gen --expression-file jquery-colorbox-wrapper.js
, it should execute successfully.

However, a second problem arises: the generated declaration file is empty since jquery-colorbox, as a jQuery plugin, extends the jQuery object without its own exports. One approach is to modify the wrapper script to return the jQuery object, resulting in combined declarations for jquery-colorbox and jQuery. To address this, compare the declaration files generated for jQuery with and without jquery-colorbox. By adding global.jQuery; to the jquery-colorbox-wrapper.js, running dts-gen, commenting out the require("jquery-colorbox"); line, running dts-gen with a different output file, and diffing the two files, you can isolate the jquery-colorbox-specific declarations and easily eliminate any unnecessary variables. Cleaning up the declaration file will be a significant task.

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