create project

kitabcitab/node_modules/@next/eslint-plugin-next/dist/rules/no-unwanted-polyfillio.js

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