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insertInto and insertAt collaboration bug fixed #325

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merged 1 commit into from May 8, 2018
Merged

insertInto and insertAt collaboration bug fixed #325

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11 changes: 7 additions & 4 deletions lib/addStyles.js
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Expand Up @@ -23,14 +23,17 @@ var isOldIE = memoize(function () {
return window && document && document.all && !window.atob;
});

var getTarget = function (target) {
var getTarget = function (target, parent) {
if (parent){
return parent.querySelector(target);
}
return document.querySelector(target);
};

var getElement = (function (fn) {
var memo = {};

return function(target) {
return function(target, parent) {
// If passing function in options, then use it for resolve "head" element.
// Useful for Shadow Root style i.e
// {
Expand All @@ -40,7 +43,7 @@ var getElement = (function (fn) {
return target();
}
if (typeof memo[target] === "undefined") {
var styleTarget = getTarget.call(this, target);
var styleTarget = getTarget.call(this, target, parent);
// Special case to return head of iframe instead of iframe itself
if (window.HTMLIFrameElement && styleTarget instanceof window.HTMLIFrameElement) {
try {
Expand Down Expand Up @@ -181,7 +184,7 @@ function insertStyleElement (options, style) {
} else if (options.insertAt === "bottom") {
target.appendChild(style);
} else if (typeof options.insertAt === "object" && options.insertAt.before) {
var nextSibling = getElement(options.insertInto + " " + options.insertAt.before);
var nextSibling = getElement(options.insertAt.before, target);
target.insertBefore(style, nextSibling);
} else {
throw new Error("[Style Loader]\n\n Invalid value for parameter 'insertAt' ('options.insertAt') found.\n Must be 'top', 'bottom', or Object.\n (https://github.com/webpack-contrib/style-loader#insertat)\n");
Expand Down
26 changes: 25 additions & 1 deletion test/basic.test.js
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Expand Up @@ -25,7 +25,7 @@ describe("basic tests", function() {
rootDir = path.resolve(__dirname + "/../") + "/",
jsdomHtml = [
"<html>",
"<head>",
"<head id='head'>",
existingStyle,
"</head>",
"<body>",
Expand Down Expand Up @@ -158,6 +158,30 @@ describe("basic tests", function() {
}, selector);
});

it("insert at before with insert into custom element by function", function(done) {
const selector = "#head";
styleLoaderOptions.insertInto = () => document.querySelector("#head");

styleLoaderOptions.insertAt = {
before: "#existing-style"
};

let expected = requiredCss;

runCompilerTest(expected, done, function() {
let head = this.document.querySelector(selector);
let existingStyleIndex;
for (let i = 0; i < head.children.length; i++){
let html = `<style id="existing-style">${head.children[i].innerHTML}</style>`;
if(html === existingStyle){
existingStyleIndex = i;
break;
}
}
return head.children[existingStyleIndex - 1].innerHTML;
}, selector);
}); // it insert at before with insert into

it("singleton (true)", function(done) {
// Setup
styleLoaderOptions.singleton = true;
Expand Down