I'm having some trouble getting d3-tip to work with webpack while using TypeScript. Whenever I try to trigger mouseover events, I get an error saying
"Uncaught TypeError: Cannot read property 'target' of null"This issue arises because the d3.event in the d3-tip module is null.
Here's how I include the modules:
const d3: any = require("d3");
d3.tip = require("d3-tip");
It seems that there may be a conflict between the d3 instance I'm using and the one within the d3-tip module, causing these problems. However, I'm not sure how to resolve it. Inside the d3-tip module, we have:
(function (root, factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module with d3 as a dependency.
define(['d3'], factory)
} else if (typeof module === 'object' && module.exports) {
// CommonJS
var d3 = require('d3')
module.exports = factory(d3)
} else {
// Browser global.
root.d3.tip = factory(root.d3)
}
}(this, function (d3) {
...
And after being compiled by webpack, it looks like this:
function(module, exports, __webpack_require__) {
var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_ARRAY__, __WEBPACK_AMD_DEFINE_RESULT__;// d3.tip
// Copyright (c) 2013 Justin Palmer
//
// Tooltips for d3.js SVG visualizations
(function (root, factory) {
if (true) {
// AMD. Register as an anonymous module with d3 as a dependency.
!(__WEBPACK_AMD_DEFINE_ARRAY__ = [__webpack_require__(465)], __WEBPACK_AMD_DEFINE_FACTORY__ = (factory), __WEBPACK_AMD_DEFINE_RESULT__ = (typeof __WEBPACK_AMD_DEFINE_FACTORY__ === 'function' ? (__WEBPACK_AMD_DEFINE_FACTORY__.apply(exports, __WEBPACK_AMD_DEFINE_ARRAY__)) : __WEBPACK_AMD_DEFINE_FACTORY__), __WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__))
} else if (typeof module === 'object' && module.exports) {
// CommonJS
var d3 = require('d3')
module.exports = factory(d3)
} else {
// Browser global.
root.d3.tip = factory(root.d3)
}
}(this, function (d3) {
...
It's clear that AMD is in use here. If only I could access the factory of d3-tip, perhaps I could resolve this problem.