Add preprocess.

Author: yunbookf

dist/index.js

@@ -122,6 +122,9 @@ const loader = {
             }
             else {
                 let needExports = [];
+                if (opt.preprocess) {
+                    code = opt.preprocess(code, path);
+                }
                 code = this.removeComment(code);
                 let strict = '';
                 if (code.includes('"use strict"')) {

dist/test-on-browser.js

@@ -104,6 +104,10 @@ loader.ready(function () {
                     alert('The invoke function.');
                 },
                 'location': 'The override var.'
+            },
+            'preprocess': function (code, path) {
+                console.log(`Replace file "${path}" content.`);
+                return code.replace('nothing', 'none');
             }
         })[0];
         (_a = document.getElementById('clear')) === null || _a === void 0 ? void 0 : _a.addEventListener('click', function () {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@litert/loader",
-  "version": "2.1.2-rc3",
+  "version": "2.1.3-rc4",
   "description": "Simple browser module loader.",
   "keywords": [
     "litert",

sources/index.ts

@@ -61,6 +61,7 @@ const loader: ILoader = {
         'dir'?: string;
         'style'?: string;
         'invoke'?: Record<string, any>;
+        'preprocess'?: (code: string, path: string) => string;
     } = {}): any[] {
         if (typeof paths === 'string') {
             paths = [paths];
@@ -140,6 +141,10 @@ const loader: ILoader = {
             else {
                 /** --- 代码末尾增加 exports.xxx = --- */
                 let needExports: string[] = [];
+                // --- 预处理代码 ---
+                if (opt.preprocess) {
+                    code = opt.preprocess(code, path);
+                }
                 // --- 去除 // 注释、/* 注释 ---
                 code = this.removeComment(code);
                 // --- 先去除严格模式字符串 ---

sources/test-on-browser.ts

@@ -99,6 +99,10 @@ loader.ready(async function(): Promise<void> {
                 alert('The invoke function.');
             },
             'location': 'The override var.'
+        },
+        'preprocess': function(code: string, path: string): string {
+            console.log(`Replace file "${path}" content.`);
+            return code.replace('nothing', 'none');
         }
     })[0];
 

types/loader.d.ts

@@ -26,6 +26,7 @@ interface ILoader {
         'dir'?: string;
         'style'?: string;
         'invoke'?: Record<string, any>;
+        'preprocess'?: (code: string, path: string) => string;
     }): any[];
     /**
      * --- 简单 fetch 获取网络数据 ---