in angular.json:
"configurations": { "production": { "index": { "input": "src/index.prod.html", "output": "index.html" }, "fileReplacements": [ { "replace": "src/environments/environment.ts", "with": "src/environments/environment.prod.ts" } ],
[Angular] Dynamic replacement for index.html
原文：https://www.cnblogs.com/Answer1215/p/12804139.html