diff --git a/declarations/plugins/SourceMapDevToolPlugin.d.ts b/declarations/plugins/SourceMapDevToolPlugin.d.ts
index c9f8b431c05..e0104874453 100644
--- a/declarations/plugins/SourceMapDevToolPlugin.d.ts
+++ b/declarations/plugins/SourceMapDevToolPlugin.d.ts
@@ -17,7 +17,13 @@ export interface SourceMapDevToolPluginOptions {
 	/**
 	 * Appends the given value to the original asset. Usually the #sourceMappingURL comment. [url] is replaced with a URL to the source map file. false disables the appending.
 	 */
-	append?: (false | null) | string;
+	append?:
+		| (false | null)
+		| string
+		| ((
+				pathData: import("../../lib/Compilation").PathData,
+				assetInfo?: import("../../lib/Compilation").AssetInfo
+		  ) => string);
 	/**
 	 * Indicates whether column mappings should be used (defaults to true).
 	 */
diff --git a/lib/EvalSourceMapDevToolPlugin.js b/lib/EvalSourceMapDevToolPlugin.js
index c03b09007b2..e4d85cbb131 100644
--- a/lib/EvalSourceMapDevToolPlugin.js
+++ b/lib/EvalSourceMapDevToolPlugin.js
@@ -48,7 +48,9 @@ class EvalSourceMapDevToolPlugin {
 			options = inputOptions;
 		}
 		this.sourceMapComment =
-			options.append || "//# sourceURL=[module]\n//# sourceMappingURL=[url]";
+			options.append && typeof options.append !== "function"
+				? options.append
+				: "//# sourceURL=[module]\n//# sourceMappingURL=[url]";
 		this.moduleFilenameTemplate =
 			options.moduleFilenameTemplate ||
 			"webpack://[namespace]/[resource-path]?[hash]";
diff --git a/lib/SourceMapDevToolPlugin.js b/lib/SourceMapDevToolPlugin.js
index 49ebabc9b30..1a0a581657e 100644
--- a/lib/SourceMapDevToolPlugin.js
+++ b/lib/SourceMapDevToolPlugin.js
@@ -23,6 +23,7 @@ const { makePathsAbsolute } = require("./util/identifier");
 /** @typedef {import("./CacheFacade").ItemCacheFacade} ItemCacheFacade */
 /** @typedef {import("./Chunk")} Chunk */
 /** @typedef {import("./Compilation").AssetInfo} AssetInfo */
+/** @typedef {import("./Compilation").PathData} PathData */
 /** @typedef {import("./Compiler")} Compiler */
 /** @typedef {import("./Module")} Module */
 /** @typedef {import("./NormalModule").SourceMap} SourceMap */
@@ -139,7 +140,7 @@ class SourceMapDevToolPlugin {
 
 		/** @type {string | false} */
 		this.sourceMapFilename = options.filename;
-		/** @type {string | false} */
+		/** @type {string | false | (function(PathData, AssetInfo=): string)}} */
 		this.sourceMappingURLComment =
 			options.append === false
 				? false
@@ -447,13 +448,14 @@ class SourceMapDevToolPlugin {
 										);
 									}
 
-									/** @type {string | false} */
+									/** @type {string | false | (function(PathData, AssetInfo=): string)} */
 									let currentSourceMappingURLComment = sourceMappingURLComment;
 									let cssExtensionDetected =
 										CSS_EXTENSION_DETECT_REGEXP.test(file);
 									resetRegexpState(CSS_EXTENSION_DETECT_REGEXP);
 									if (
 										currentSourceMappingURLComment !== false &&
+										typeof currentSourceMappingURLComment !== "function" &&
 										cssExtensionDetected
 									) {
 										currentSourceMappingURLComment =
@@ -534,6 +536,11 @@ class SourceMapDevToolPlugin {
 												"SourceMapDevToolPlugin: append can't be false when no filename is provided"
 											);
 										}
+										if (typeof currentSourceMappingURLComment === "function") {
+											throw new Error(
+												"SourceMapDevToolPlugin: append can't be a function when no filename is provided"
+											);
+										}
 										/**
 										 * Add source map as data url to asset
 										 */
diff --git a/schemas/plugins/SourceMapDevToolPlugin.check.js b/schemas/plugins/SourceMapDevToolPlugin.check.js
index f5b72577f8a..c821ebe496a 100644
--- a/schemas/plugins/SourceMapDevToolPlugin.check.js
+++ b/schemas/plugins/SourceMapDevToolPlugin.check.js
@@ -3,4 +3,4 @@
  * DO NOT MODIFY BY HAND.
  * Run `yarn special-lint-fix` to update
  */
-const e=/^(?:[A-Za-z]:[\\/]|\\\\|\/)/;module.exports=l,module.exports.default=l;const n={definitions:{rule:{anyOf:[{instanceof:"RegExp"},{type:"string",minLength:1}]},rules:{anyOf:[{type:"array",items:{oneOf:[{$ref:"#/definitions/rule"}]}},{$ref:"#/definitions/rule"}]}},type:"object",additionalProperties:!1,properties:{append:{anyOf:[{enum:[!1,null]},{type:"string",minLength:1}]},columns:{type:"boolean"},exclude:{oneOf:[{$ref:"#/definitions/rules"}]},fallbackModuleFilenameTemplate:{anyOf:[{type:"string",minLength:1},{instanceof:"Function"}]},fileContext:{type:"string"},filename:{anyOf:[{enum:[!1,null]},{type:"string",absolutePath:!1,minLength:1}]},include:{oneOf:[{$ref:"#/definitions/rules"}]},module:{type:"boolean"},moduleFilenameTemplate:{anyOf:[{type:"string",minLength:1},{instanceof:"Function"}]},namespace:{type:"string"},noSources:{type:"boolean"},publicPath:{type:"string"},sourceRoot:{type:"string"},test:{$ref:"#/definitions/rules"}}},t=Object.prototype.hasOwnProperty;function s(e,{instancePath:n="",parentData:t,parentDataProperty:l,rootData:r=e}={}){let o=null,a=0;const i=a;let p=!1;const u=a;if(a===u)if(Array.isArray(e)){const n=e.length;for(let t=0;t<n;t++){let n=e[t];const s=a,l=a;let r=!1,i=null;const p=a,u=a;let c=!1;const m=a;if(!(n instanceof RegExp)){const e={params:{}};null===o?o=[e]:o.push(e),a++}var f=m===a;if(c=c||f,!c){const e=a;if(a===e)if("string"==typeof n){if(n.length<1){const e={params:{}};null===o?o=[e]:o.push(e),a++}}else{const e={params:{type:"string"}};null===o?o=[e]:o.push(e),a++}f=e===a,c=c||f}if(c)a=u,null!==o&&(u?o.length=u:o=null);else{const e={params:{}};null===o?o=[e]:o.push(e),a++}if(p===a&&(r=!0,i=0),r)a=l,null!==o&&(l?o.length=l:o=null);else{const e={params:{passingSchemas:i}};null===o?o=[e]:o.push(e),a++}if(s!==a)break}}else{const e={params:{type:"array"}};null===o?o=[e]:o.push(e),a++}var c=u===a;if(p=p||c,!p){const n=a,t=a;let s=!1;const l=a;if(!(e instanceof RegExp)){const e={params:{}};null===o?o=[e]:o.push(e),a++}var m=l===a;if(s=s||m,!s){const n=a;if(a===n)if("string"==typeof e){if(e.length<1){const e={params:{}};null===o?o=[e]:o.push(e),a++}}else{const e={params:{type:"string"}};null===o?o=[e]:o.push(e),a++}m=n===a,s=s||m}if(s)a=t,null!==o&&(t?o.length=t:o=null);else{const e={params:{}};null===o?o=[e]:o.push(e),a++}c=n===a,p=p||c}if(!p){const e={params:{}};return null===o?o=[e]:o.push(e),a++,s.errors=o,!1}return a=i,null!==o&&(i?o.length=i:o=null),s.errors=o,0===a}function l(r,{instancePath:o="",parentData:a,parentDataProperty:i,rootData:p=r}={}){let u=null,f=0;if(0===f){if(!r||"object"!=typeof r||Array.isArray(r))return l.errors=[{params:{type:"object"}}],!1;{const a=f;for(const e in r)if(!t.call(n.properties,e))return l.errors=[{params:{additionalProperty:e}}],!1;if(a===f){if(void 0!==r.append){let e=r.append;const n=f,t=f;let s=!1;const o=f;if(!1!==e&&null!==e){const e={params:{}};null===u?u=[e]:u.push(e),f++}var c=o===f;if(s=s||c,!s){const n=f;if(f===n)if("string"==typeof e){if(e.length<1){const e={params:{}};null===u?u=[e]:u.push(e),f++}}else{const e={params:{type:"string"}};null===u?u=[e]:u.push(e),f++}c=n===f,s=s||c}if(!s){const e={params:{}};return null===u?u=[e]:u.push(e),f++,l.errors=u,!1}f=t,null!==u&&(t?u.length=t:u=null);var m=n===f}else m=!0;if(m){if(void 0!==r.columns){const e=f;if("boolean"!=typeof r.columns)return l.errors=[{params:{type:"boolean"}}],!1;m=e===f}else m=!0;if(m){if(void 0!==r.exclude){const e=f,n=f;let t=!1,a=null;const i=f;if(s(r.exclude,{instancePath:o+"/exclude",parentData:r,parentDataProperty:"exclude",rootData:p})||(u=null===u?s.errors:u.concat(s.errors),f=u.length),i===f&&(t=!0,a=0),!t){const e={params:{passingSchemas:a}};return null===u?u=[e]:u.push(e),f++,l.errors=u,!1}f=n,null!==u&&(n?u.length=n:u=null),m=e===f}else m=!0;if(m){if(void 0!==r.fallbackModuleFilenameTemplate){let e=r.fallbackModuleFilenameTemplate;const n=f,t=f;let s=!1;const o=f;if(f===o)if("string"==typeof e){if(e.length<1){const e={params:{}};null===u?u=[e]:u.push(e),f++}}else{const e={params:{type:"string"}};null===u?u=[e]:u.push(e),f++}var h=o===f;if(s=s||h,!s){const n=f;if(!(e instanceof Function)){const e={params:{}};null===u?u=[e]:u.push(e),f++}h=n===f,s=s||h}if(!s){const e={params:{}};return null===u?u=[e]:u.push(e),f++,l.errors=u,!1}f=t,null!==u&&(t?u.length=t:u=null),m=n===f}else m=!0;if(m){if(void 0!==r.fileContext){const e=f;if("string"!=typeof r.fileContext)return l.errors=[{params:{type:"string"}}],!1;m=e===f}else m=!0;if(m){if(void 0!==r.filename){let n=r.filename;const t=f,s=f;let o=!1;const a=f;if(!1!==n&&null!==n){const e={params:{}};null===u?u=[e]:u.push(e),f++}var y=a===f;if(o=o||y,!o){const t=f;if(f===t)if("string"==typeof n){if(n.includes("!")||!1!==e.test(n)){const e={params:{}};null===u?u=[e]:u.push(e),f++}else if(n.length<1){const e={params:{}};null===u?u=[e]:u.push(e),f++}}else{const e={params:{type:"string"}};null===u?u=[e]:u.push(e),f++}y=t===f,o=o||y}if(!o){const e={params:{}};return null===u?u=[e]:u.push(e),f++,l.errors=u,!1}f=s,null!==u&&(s?u.length=s:u=null),m=t===f}else m=!0;if(m){if(void 0!==r.include){const e=f,n=f;let t=!1,a=null;const i=f;if(s(r.include,{instancePath:o+"/include",parentData:r,parentDataProperty:"include",rootData:p})||(u=null===u?s.errors:u.concat(s.errors),f=u.length),i===f&&(t=!0,a=0),!t){const e={params:{passingSchemas:a}};return null===u?u=[e]:u.push(e),f++,l.errors=u,!1}f=n,null!==u&&(n?u.length=n:u=null),m=e===f}else m=!0;if(m){if(void 0!==r.module){const e=f;if("boolean"!=typeof r.module)return l.errors=[{params:{type:"boolean"}}],!1;m=e===f}else m=!0;if(m){if(void 0!==r.moduleFilenameTemplate){let e=r.moduleFilenameTemplate;const n=f,t=f;let s=!1;const o=f;if(f===o)if("string"==typeof e){if(e.length<1){const e={params:{}};null===u?u=[e]:u.push(e),f++}}else{const e={params:{type:"string"}};null===u?u=[e]:u.push(e),f++}var g=o===f;if(s=s||g,!s){const n=f;if(!(e instanceof Function)){const e={params:{}};null===u?u=[e]:u.push(e),f++}g=n===f,s=s||g}if(!s){const e={params:{}};return null===u?u=[e]:u.push(e),f++,l.errors=u,!1}f=t,null!==u&&(t?u.length=t:u=null),m=n===f}else m=!0;if(m){if(void 0!==r.namespace){const e=f;if("string"!=typeof r.namespace)return l.errors=[{params:{type:"string"}}],!1;m=e===f}else m=!0;if(m){if(void 0!==r.noSources){const e=f;if("boolean"!=typeof r.noSources)return l.errors=[{params:{type:"boolean"}}],!1;m=e===f}else m=!0;if(m){if(void 0!==r.publicPath){const e=f;if("string"!=typeof r.publicPath)return l.errors=[{params:{type:"string"}}],!1;m=e===f}else m=!0;if(m){if(void 0!==r.sourceRoot){const e=f;if("string"!=typeof r.sourceRoot)return l.errors=[{params:{type:"string"}}],!1;m=e===f}else m=!0;if(m)if(void 0!==r.test){const e=f;s(r.test,{instancePath:o+"/test",parentData:r,parentDataProperty:"test",rootData:p})||(u=null===u?s.errors:u.concat(s.errors),f=u.length),m=e===f}else m=!0}}}}}}}}}}}}}}}return l.errors=u,0===f}
\ No newline at end of file
+const e=/^(?:[A-Za-z]:[\\/]|\\\\|\/)/;module.exports=l,module.exports.default=l;const n={definitions:{rule:{anyOf:[{instanceof:"RegExp"},{type:"string",minLength:1}]},rules:{anyOf:[{type:"array",items:{oneOf:[{$ref:"#/definitions/rule"}]}},{$ref:"#/definitions/rule"}]}},type:"object",additionalProperties:!1,properties:{append:{anyOf:[{enum:[!1,null]},{type:"string",minLength:1},{instanceof:"Function"}]},columns:{type:"boolean"},exclude:{oneOf:[{$ref:"#/definitions/rules"}]},fallbackModuleFilenameTemplate:{anyOf:[{type:"string",minLength:1},{instanceof:"Function"}]},fileContext:{type:"string"},filename:{anyOf:[{enum:[!1,null]},{type:"string",absolutePath:!1,minLength:1}]},include:{oneOf:[{$ref:"#/definitions/rules"}]},module:{type:"boolean"},moduleFilenameTemplate:{anyOf:[{type:"string",minLength:1},{instanceof:"Function"}]},namespace:{type:"string"},noSources:{type:"boolean"},publicPath:{type:"string"},sourceRoot:{type:"string"},test:{$ref:"#/definitions/rules"}}},t=Object.prototype.hasOwnProperty;function s(e,{instancePath:n="",parentData:t,parentDataProperty:l,rootData:r=e}={}){let o=null,a=0;const i=a;let u=!1;const p=a;if(a===p)if(Array.isArray(e)){const n=e.length;for(let t=0;t<n;t++){let n=e[t];const s=a,l=a;let r=!1,i=null;const u=a,p=a;let c=!1;const m=a;if(!(n instanceof RegExp)){const e={params:{}};null===o?o=[e]:o.push(e),a++}var f=m===a;if(c=c||f,!c){const e=a;if(a===e)if("string"==typeof n){if(n.length<1){const e={params:{}};null===o?o=[e]:o.push(e),a++}}else{const e={params:{type:"string"}};null===o?o=[e]:o.push(e),a++}f=e===a,c=c||f}if(c)a=p,null!==o&&(p?o.length=p:o=null);else{const e={params:{}};null===o?o=[e]:o.push(e),a++}if(u===a&&(r=!0,i=0),r)a=l,null!==o&&(l?o.length=l:o=null);else{const e={params:{passingSchemas:i}};null===o?o=[e]:o.push(e),a++}if(s!==a)break}}else{const e={params:{type:"array"}};null===o?o=[e]:o.push(e),a++}var c=p===a;if(u=u||c,!u){const n=a,t=a;let s=!1;const l=a;if(!(e instanceof RegExp)){const e={params:{}};null===o?o=[e]:o.push(e),a++}var m=l===a;if(s=s||m,!s){const n=a;if(a===n)if("string"==typeof e){if(e.length<1){const e={params:{}};null===o?o=[e]:o.push(e),a++}}else{const e={params:{type:"string"}};null===o?o=[e]:o.push(e),a++}m=n===a,s=s||m}if(s)a=t,null!==o&&(t?o.length=t:o=null);else{const e={params:{}};null===o?o=[e]:o.push(e),a++}c=n===a,u=u||c}if(!u){const e={params:{}};return null===o?o=[e]:o.push(e),a++,s.errors=o,!1}return a=i,null!==o&&(i?o.length=i:o=null),s.errors=o,0===a}function l(r,{instancePath:o="",parentData:a,parentDataProperty:i,rootData:u=r}={}){let p=null,f=0;if(0===f){if(!r||"object"!=typeof r||Array.isArray(r))return l.errors=[{params:{type:"object"}}],!1;{const a=f;for(const e in r)if(!t.call(n.properties,e))return l.errors=[{params:{additionalProperty:e}}],!1;if(a===f){if(void 0!==r.append){let e=r.append;const n=f,t=f;let s=!1;const o=f;if(!1!==e&&null!==e){const e={params:{}};null===p?p=[e]:p.push(e),f++}var c=o===f;if(s=s||c,!s){const n=f;if(f===n)if("string"==typeof e){if(e.length<1){const e={params:{}};null===p?p=[e]:p.push(e),f++}}else{const e={params:{type:"string"}};null===p?p=[e]:p.push(e),f++}if(c=n===f,s=s||c,!s){const n=f;if(!(e instanceof Function)){const e={params:{}};null===p?p=[e]:p.push(e),f++}c=n===f,s=s||c}}if(!s){const e={params:{}};return null===p?p=[e]:p.push(e),f++,l.errors=p,!1}f=t,null!==p&&(t?p.length=t:p=null);var m=n===f}else m=!0;if(m){if(void 0!==r.columns){const e=f;if("boolean"!=typeof r.columns)return l.errors=[{params:{type:"boolean"}}],!1;m=e===f}else m=!0;if(m){if(void 0!==r.exclude){const e=f,n=f;let t=!1,a=null;const i=f;if(s(r.exclude,{instancePath:o+"/exclude",parentData:r,parentDataProperty:"exclude",rootData:u})||(p=null===p?s.errors:p.concat(s.errors),f=p.length),i===f&&(t=!0,a=0),!t){const e={params:{passingSchemas:a}};return null===p?p=[e]:p.push(e),f++,l.errors=p,!1}f=n,null!==p&&(n?p.length=n:p=null),m=e===f}else m=!0;if(m){if(void 0!==r.fallbackModuleFilenameTemplate){let e=r.fallbackModuleFilenameTemplate;const n=f,t=f;let s=!1;const o=f;if(f===o)if("string"==typeof e){if(e.length<1){const e={params:{}};null===p?p=[e]:p.push(e),f++}}else{const e={params:{type:"string"}};null===p?p=[e]:p.push(e),f++}var h=o===f;if(s=s||h,!s){const n=f;if(!(e instanceof Function)){const e={params:{}};null===p?p=[e]:p.push(e),f++}h=n===f,s=s||h}if(!s){const e={params:{}};return null===p?p=[e]:p.push(e),f++,l.errors=p,!1}f=t,null!==p&&(t?p.length=t:p=null),m=n===f}else m=!0;if(m){if(void 0!==r.fileContext){const e=f;if("string"!=typeof r.fileContext)return l.errors=[{params:{type:"string"}}],!1;m=e===f}else m=!0;if(m){if(void 0!==r.filename){let n=r.filename;const t=f,s=f;let o=!1;const a=f;if(!1!==n&&null!==n){const e={params:{}};null===p?p=[e]:p.push(e),f++}var y=a===f;if(o=o||y,!o){const t=f;if(f===t)if("string"==typeof n){if(n.includes("!")||!1!==e.test(n)){const e={params:{}};null===p?p=[e]:p.push(e),f++}else if(n.length<1){const e={params:{}};null===p?p=[e]:p.push(e),f++}}else{const e={params:{type:"string"}};null===p?p=[e]:p.push(e),f++}y=t===f,o=o||y}if(!o){const e={params:{}};return null===p?p=[e]:p.push(e),f++,l.errors=p,!1}f=s,null!==p&&(s?p.length=s:p=null),m=t===f}else m=!0;if(m){if(void 0!==r.include){const e=f,n=f;let t=!1,a=null;const i=f;if(s(r.include,{instancePath:o+"/include",parentData:r,parentDataProperty:"include",rootData:u})||(p=null===p?s.errors:p.concat(s.errors),f=p.length),i===f&&(t=!0,a=0),!t){const e={params:{passingSchemas:a}};return null===p?p=[e]:p.push(e),f++,l.errors=p,!1}f=n,null!==p&&(n?p.length=n:p=null),m=e===f}else m=!0;if(m){if(void 0!==r.module){const e=f;if("boolean"!=typeof r.module)return l.errors=[{params:{type:"boolean"}}],!1;m=e===f}else m=!0;if(m){if(void 0!==r.moduleFilenameTemplate){let e=r.moduleFilenameTemplate;const n=f,t=f;let s=!1;const o=f;if(f===o)if("string"==typeof e){if(e.length<1){const e={params:{}};null===p?p=[e]:p.push(e),f++}}else{const e={params:{type:"string"}};null===p?p=[e]:p.push(e),f++}var g=o===f;if(s=s||g,!s){const n=f;if(!(e instanceof Function)){const e={params:{}};null===p?p=[e]:p.push(e),f++}g=n===f,s=s||g}if(!s){const e={params:{}};return null===p?p=[e]:p.push(e),f++,l.errors=p,!1}f=t,null!==p&&(t?p.length=t:p=null),m=n===f}else m=!0;if(m){if(void 0!==r.namespace){const e=f;if("string"!=typeof r.namespace)return l.errors=[{params:{type:"string"}}],!1;m=e===f}else m=!0;if(m){if(void 0!==r.noSources){const e=f;if("boolean"!=typeof r.noSources)return l.errors=[{params:{type:"boolean"}}],!1;m=e===f}else m=!0;if(m){if(void 0!==r.publicPath){const e=f;if("string"!=typeof r.publicPath)return l.errors=[{params:{type:"string"}}],!1;m=e===f}else m=!0;if(m){if(void 0!==r.sourceRoot){const e=f;if("string"!=typeof r.sourceRoot)return l.errors=[{params:{type:"string"}}],!1;m=e===f}else m=!0;if(m)if(void 0!==r.test){const e=f;s(r.test,{instancePath:o+"/test",parentData:r,parentDataProperty:"test",rootData:u})||(p=null===p?s.errors:p.concat(s.errors),f=p.length),m=e===f}else m=!0}}}}}}}}}}}}}}}return l.errors=p,0===f}
\ No newline at end of file
diff --git a/schemas/plugins/SourceMapDevToolPlugin.json b/schemas/plugins/SourceMapDevToolPlugin.json
index a4362aa7ad9..8489b1244ca 100644
--- a/schemas/plugins/SourceMapDevToolPlugin.json
+++ b/schemas/plugins/SourceMapDevToolPlugin.json
@@ -47,6 +47,10 @@
         {
           "type": "string",
           "minLength": 1
+        },
+        {
+          "instanceof": "Function",
+          "tsType": "((pathData: import(\"../../lib/Compilation\").PathData, assetInfo?: import(\"../../lib/Compilation\").AssetInfo) => string)"
         }
       ]
     },
diff --git a/test/configCases/plugins/source-map-dev-tool-plugin-append-function/index.js b/test/configCases/plugins/source-map-dev-tool-plugin-append-function/index.js
new file mode 100644
index 00000000000..464fe983765
--- /dev/null
+++ b/test/configCases/plugins/source-map-dev-tool-plugin-append-function/index.js
@@ -0,0 +1,6 @@
+it("should have [file] replaced with chunk filename in append", function() {
+	const fs = require("fs"),
+			path = require("path");
+	const source = fs.readFileSync(path.join(__dirname, "some-test.js"), "utf-8");
+	expect(source).toMatch("//# sourceMappingURL=http://localhost:50505/some-test.js.map");
+});
diff --git a/test/configCases/plugins/source-map-dev-tool-plugin-append-function/test.js b/test/configCases/plugins/source-map-dev-tool-plugin-append-function/test.js
new file mode 100644
index 00000000000..a6b9cb13401
--- /dev/null
+++ b/test/configCases/plugins/source-map-dev-tool-plugin-append-function/test.js
@@ -0,0 +1,5 @@
+const testObject = {
+	a: 1
+};
+
+module.exports = testObject;
diff --git a/test/configCases/plugins/source-map-dev-tool-plugin-append-function/webpack.config.js b/test/configCases/plugins/source-map-dev-tool-plugin-append-function/webpack.config.js
new file mode 100644
index 00000000000..052cc917dfe
--- /dev/null
+++ b/test/configCases/plugins/source-map-dev-tool-plugin-append-function/webpack.config.js
@@ -0,0 +1,26 @@
+const webpack = require("../../../../");
+const TerserPlugin = require("terser-webpack-plugin");
+
+/** @type {import("../../../../types").Configuration} */
+module.exports = {
+	node: {
+		__dirname: false,
+		__filename: false
+	},
+	entry: {
+		bundle0: ["./index.js"],
+		"some-test": ["./test.js"]
+	},
+	output: {
+		filename: "[name].js"
+	},
+	optimization: {
+		minimizer: [new TerserPlugin()]
+	},
+	plugins: [
+		new webpack.SourceMapDevToolPlugin({
+			filename: "sourcemaps/[file].map",
+			append: data => `\n//# sourceMappingURL=http://localhost:50505/[file].map`
+		})
+	]
+};
diff --git a/types.d.ts b/types.d.ts
index f4724c187a2..ae02564fb63 100644
--- a/types.d.ts
+++ b/types.d.ts
@@ -11648,7 +11648,10 @@ declare interface SourceMap {
 declare class SourceMapDevToolPlugin {
 	constructor(options?: SourceMapDevToolPluginOptions);
 	sourceMapFilename: string | false;
-	sourceMappingURLComment: string | false;
+	sourceMappingURLComment:
+		| string
+		| false
+		| ((arg0: PathData, arg1?: AssetInfo) => string);
 	moduleFilenameTemplate: string | Function;
 	fallbackModuleFilenameTemplate: string | Function;
 	namespace: string;
@@ -11663,7 +11666,11 @@ declare interface SourceMapDevToolPluginOptions {
 	/**
 	 * Appends the given value to the original asset. Usually the #sourceMappingURL comment. [url] is replaced with a URL to the source map file. false disables the appending.
 	 */
-	append?: null | string | false;
+	append?:
+		| null
+		| string
+		| false
+		| ((pathData: PathData, assetInfo?: AssetInfo) => string);
 
 	/**
 	 * Indicates whether column mappings should be used (defaults to true).