fix: license files now have .txt suffix by default

README.md

@@ -395,7 +395,7 @@ Default: `true`
 
 Whether comments shall be extracted to a separate file, (see [details](https://github.com/webpack/webpack/commit/71933e979e51c533b432658d5e37917f9e71595a)).
 By default extract only comments using `/^\**!|@preserve|@license|@cc_on/i` regexp condition and remove remaining comments.
-If the original file is named `foo.js`, then the comments will be stored to `foo.js.LICENSE`.
+If the original file is named `foo.js`, then the comments will be stored to `foo.js.LICENSE.txt`.
 The `terserOptions.output.comments` option specifies whether the comment will be preserved, i.e. it is possible to preserve some comments (e.g. annotations) while extracting others or even preserving comments that have been extracted.
 
 #### `Boolean`
@@ -500,7 +500,7 @@ module.exports = {
             // A file can contain a query string (for example when you have `output.filename: '[name].js?[chunkhash]'`)
             // You must consider this
             // The "fileData" argument contains object with "filename", "basename", "query"
-            return file.replace(/\.(\w+)($|\?)/, '.$1.LICENSE$2');
+            return file.replace(/\.(\w+)($|\?)/, '.$1.LICENSE.txt$2');
           },
           banner: (licenseFile) => {
             return `License information can be found in ${licenseFile}`;
@@ -533,7 +533,7 @@ module.exports = {
 
             // A file can contain a query string (for example when you have `output.filename: '[name].js?[chunkhash]'`)
             // You must consider this
-            return file.replace(/\.(\w+)($|\?)/, '.$1.LICENSE$2');
+            return file.replace(/\.(\w+)($|\?)/, '.$1.LICENSE.txt$2');
           },
           banner: (licenseFile) => {
             return `License information can be found in ${licenseFile}`;
@@ -548,12 +548,12 @@ module.exports = {
 ##### `filename`
 
 Type: `String|Function<(string) -> String>`
-Default: `[file].LICENSE[query]`
+Default: `[file].LICENSE.txt[query]`
 
 Available placeholders: `[file]`, `[query]` and `[filebase]` (`[base]` for webpack 5).
 
 The file where the extracted comments will be stored.
-Default is to append the suffix `.LICENSE` to the original filename.
+Default is to append the suffix `.LICENSE.txt` to the original filename.
 
 **webpack.config.js**
 
@@ -600,7 +600,7 @@ module.exports = {
 
             // A file can contain a query string (for example when you have `output.filename: '[name].js?[chunkhash]'`)
             // You must consider this
-            return file.replace(/\.(\w+)($|\?)/, '.$1.LICENSE$2');
+            return file.replace(/\.(\w+)($|\?)/, '.$1.LICENSE.txt$2');
           },
           banner: (commentsFile) => {
             return `My custom banner about license information ${commentsFile}`;

src/index.js

@@ -291,7 +291,8 @@ class TerserPlugin {
 
           if (this.options.extractComments) {
             commentsFilename =
-              this.options.extractComments.filename || '[file].LICENSE[query]';
+              this.options.extractComments.filename ||
+              '[file].LICENSE.txt[query]';
 
             if (TerserPlugin.isWebpack4()) {
               // Todo remove this in next major release

test/__snapshots__/terserOptions-option.test.js.snap.webpack4

@@ -12,9 +12,9 @@ exports[`terserOptions option should match snapshot for the "compress" option wi
 
 exports[`terserOptions option should match snapshot for the "compress" option with the "false" value: assets 1`] = `
 Object {
-  "main.js": "/*! For license information please see main.js.LICENSE */
+  "main.js": "/*! For license information please see main.js.LICENSE.txt */
 (function(e){var t={};function r(n){if(t[n]){return t[n].exports}var o=t[n]={i:n,l:false,exports:{}};e[n].call(o.exports,o,o.exports,r);o.l=true;return o.exports}r.m=e;r.c=t;r.d=function(e,t,n){if(!r.o(e,t)){Object.defineProperty(e,t,{enumerable:true,get:n})}};r.r=function(e){if(typeof Symbol!==\\"undefined\\"&&Symbol.toStringTag){Object.defineProperty(e,Symbol.toStringTag,{value:\\"Module\\"})}Object.defineProperty(e,\\"__esModule\\",{value:true})};r.t=function(e,t){if(t&1)e=r(e);if(t&8)return e;if(t&4&&typeof e===\\"object\\"&&e&&e.__esModule)return e;var n=Object.create(null);r.r(n);Object.defineProperty(n,\\"default\\",{enumerable:true,value:e});if(t&2&&typeof e!=\\"string\\")for(var o in e)r.d(n,o,function(t){return e[t]}.bind(null,o));return n};r.n=function(e){var t=e&&e.__esModule?function t(){return e[\\"default\\"]}:function t(){return e};r.d(t,\\"a\\",t);return t};r.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)};r.p=\\"\\";return r(r.s=0)})([function(e,t){const r=2+2;e.exports=function e(){const t=2+2;console.log(t+1+2)}}]);",
-  "main.js.LICENSE": "/* @preserve*/
+  "main.js.LICENSE.txt": "/* @preserve*/
 ",
 }
 `;

test/__snapshots__/terserOptions-option.test.js.snap.webpack5

@@ -12,9 +12,9 @@ exports[`terserOptions option should match snapshot for the "compress" option wi
 
 exports[`terserOptions option should match snapshot for the "compress" option with the "false" value: assets 1`] = `
 Object {
-  "main.js": "/*! For license information please see main.js.LICENSE */
+  "main.js": "/*! For license information please see main.js.LICENSE.txt */
 (()=>{var o={791:o=>{const r=2+2;o.exports=function o(){const r=2+2;console.log(r+1+2)}}};var r={};function t(n){if(r[n]){return r[n].exports}var e=r[n]={exports:{}};o[n](e,e.exports,t);return e.exports}t(791)})();",
-  "main.js.LICENSE": "/* @preserve*/
+  "main.js.LICENSE.txt": "/* @preserve*/
 ",
 }
 `;

test/extractComments-option.test.js

@@ -17,14 +17,14 @@ function createFilenameFn() {
 
         // A file can contain a query string (for example when you have `output.filename: '[name].js?[chunkhash]'`)
         // You must consider this
-        return file.replace(/\.(\w+)($|\?)/, '.$1.LICENSE$2');
+        return file.replace(/\.(\w+)($|\?)/, '.$1.LICENSE.txt$2');
       }
     : (fileData) => {
         expect(fileData).toBeDefined();
 
         // A file can contain a query string (for example when you have `output.filename: '[name].js?[chunkhash]'`)
         // You must consider this
-        return `${fileData.filename}.LICENSE${fileData.query}`;
+        return `${fileData.filename}.LICENSE.txt${fileData.query}`;
       };
 }
 
@@ -309,7 +309,7 @@ describe('extractComments option', () => {
     new TerserPlugin({
       extractComments: {
         condition: true,
-        filename: `[file].LICENSE?query=[query]&filebase=[${
+        filename: `[file].LICENSE.txt?query=[query]&filebase=[${
           getCompiler.isWebpack4() ? 'filebase' : 'base'
         }]`,
         banner(licenseFile) {