120 lines
3.9 KiB
JavaScript
120 lines
3.9 KiB
JavaScript
"use strict";
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var _definerule = require("../utils/define-rule");
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// Keep in sync with next.js polyfills file : https://github.com/vercel/next.js/blob/master/packages/next-polyfill-nomodule/src/index.js
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var NEXT_POLYFILLED_FEATURES = [
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"Array.prototype.@@iterator",
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"Array.prototype.at",
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"Array.prototype.copyWithin",
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"Array.prototype.fill",
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"Array.prototype.find",
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"Array.prototype.findIndex",
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"Array.prototype.flatMap",
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"Array.prototype.flat",
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"Array.from",
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"Array.prototype.includes",
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"Array.of",
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"Function.prototype.name",
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"fetch",
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"Map",
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"Number.EPSILON",
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"Number.Epsilon",
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"Number.isFinite",
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"Number.isNaN",
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"Number.isInteger",
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"Number.isSafeInteger",
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"Number.MAX_SAFE_INTEGER",
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"Number.MIN_SAFE_INTEGER",
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"Number.parseFloat",
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"Number.parseInt",
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"Object.assign",
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"Object.entries",
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"Object.fromEntries",
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"Object.getOwnPropertyDescriptor",
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"Object.getOwnPropertyDescriptors",
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"Object.is",
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"Object.keys",
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"Object.values",
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"Reflect",
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"Set",
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"Symbol",
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"Symbol.asyncIterator",
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"String.prototype.codePointAt",
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"String.prototype.endsWith",
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"String.fromCodePoint",
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"String.prototype.includes",
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"String.prototype.@@iterator",
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"String.prototype.padEnd",
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"String.prototype.padStart",
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"String.prototype.repeat",
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"String.raw",
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"String.prototype.startsWith",
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"String.prototype.trimEnd",
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"String.prototype.trimStart",
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"URL",
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"URL.prototype.toJSON",
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"URLSearchParams",
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"WeakMap",
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"WeakSet",
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"Promise",
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"Promise.prototype.finally",
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"es2015",
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"es2016",
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"es2017",
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"es2018",
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"es2019",
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"es5",
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"es6",
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"es7"
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];
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var url = "https://nextjs.org/docs/messages/no-unwanted-polyfillio";
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module.exports = (0, _definerule.defineRule)({
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meta: {
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docs: {
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description: "Prevent duplicate polyfills from Polyfill.io.",
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category: "HTML",
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recommended: true,
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url: url
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},
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type: "problem",
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schema: []
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},
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create: function create(context) {
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var scriptImport = null;
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return {
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ImportDeclaration: function ImportDeclaration(node) {
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if (node.source && node.source.value === "next/script") {
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scriptImport = node.specifiers[0].local.name;
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}
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},
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JSXOpeningElement: function JSXOpeningElement(node) {
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if (node.name && node.name.name !== "script" && node.name.name !== scriptImport) {
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return;
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}
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if (node.attributes.length === 0) {
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return;
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}
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var srcNode = node.attributes.find(function(attr) {
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return attr.type === "JSXAttribute" && attr.name.name === "src";
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});
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if (!srcNode || srcNode.value.type !== "Literal") {
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return;
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}
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var src = srcNode.value.value;
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if (src.startsWith("https://cdn.polyfill.io/v2/") || src.startsWith("https://polyfill.io/v3/")) {
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var featureQueryString = new URL(src).searchParams.get("features");
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var featuresRequested = (featureQueryString || "").split(",");
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var unwantedFeatures = featuresRequested.filter(function(feature) {
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return NEXT_POLYFILLED_FEATURES.includes(feature);
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});
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if (unwantedFeatures.length > 0) {
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context.report({
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node: node,
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message: "No duplicate polyfills from Polyfill.io are allowed. ".concat(unwantedFeatures.join(", "), " ").concat(unwantedFeatures.length > 1 ? "are" : "is", " already shipped with Next.js. See: ").concat(url)
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});
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}
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}
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}
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};
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}
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});
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