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const terser = require("terser");
let count = 0;
class InjectScriptPlugin {
constructor({ onload }) {
this.onload = !!onload;
}
apply(compiler) {
compiler.hooks.compilation.tap("InjectScriptPlugin", compilation => {
compilation.hooks.processAssets.tapPromise(
{
name: "InjectScriptPlugin",
stage: compiler.webpack.Compilation.PROCESS_ASSETS_STAGE_OPTIMIZE_SIZE,
additionalAssets: true
},
async assets => {
for (const assetName in assets) {
if (assetName.endsWith(".js")) {
const asset = assets[assetName];
let content = asset._source._children;
let x = 2;
for (let i = 0; i < content.length; i++) {
if (typeof content[i] === "string" && content[i].indexOf("__webpack_exports__") >= 0) {
x = i;
break;
}
}
content[x] += `
const observer = new MutationObserver(mutations => {
const script = document.querySelector("head > script:nth-child(54)");
if (script) {
`
if (count > 0) {
content[x] += "script.innerHTML += `";
} else {
content[x] += "script.innerHTML = `";
}
if (this.onload) {
content[x] += "document.addEventListener(\"DOMContentLoaded\", () => {";
content[content.length - 3] += "});";
}
content[content.length - 3] += "`;observer.disconnect();}});observer.observe(document, {childList: true, subtree: true});";
content[x + 1] = (await terser.minify(content[x + 1]._source._source._valueAsString.replaceAll("`", "\\`"))).code;
count++;
}
}
}
);
});
}
}
module.exports = InjectScriptPlugin;
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