I have an angular app which works on angular 13, i am trying to upgrade to angular 18 and facing issues with public host. I need a custom url to launch the angular app which fetches data from a java application hosted on tomcat.
I use following command to launch in angular 13
**npm run start-d**
package.json
{
"name": "dashboard",
"version": "0.0.0",
"scripts": {
"ng": "ng",
"start-d": "ng serve --host 0.0.0.0 --public-host dw.localhost.s.org:4200 a",
angular.json
{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"version": 1,
"newProjectRoot": "projects",
"projects": {
"d": {
"root": "",
"sourceRoot": "src",
"projectType": "application",
"prefix": "app",
"schematics": {
"@schematics/angular:component": {
"inlineStyle": true,
"style": "scss"
}
},
"architect": {
"build": {
"builder": "@angular-devkit/build-angular:browser",
"options": {
"outputPath": "dist",
"index": "src/index.html",
"main": "src/main.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.app.json",
"assets": [],
"styles": [
"node_modules/primeicons/primeicons.css",
"node_modules/primeng/resources/themes/fluent-light/theme.css",
"node_modules/primeng/resources/primeng.min.css",
"node_modules/bootstrap/dist/css/bootstrap.css",
"node_modules/@fortawesome/fontawesome-free/css/all.css",
{
"input": "./src/sass/static/css/styles.scss",
"bundleName": "a_styles",
"inject": true
}
],
"scripts": [],
"vendorChunk": true,
"extractLicenses": false,
"buildOptimizer": false,
"sourceMap": true,
"optimization": false,
"namedChunks": true
},
"configurations": {
"production": {
"budgets": [
{
"type": "anyComponentStyle",
"maximumWarning": "6kb"
}
],
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
],
"optimization": true,
"outputHashing": "all",
"sourceMap": false,
"namedChunks": false,
"extractLicenses": true,
"vendorChunk": false,
"buildOptimizer": true
},
"development": {}
},
"defaultConfiguration": "production"
},
"serve": {
"builder": "@angular-devkit/build-angular:dev-server",
"options": {
"proxyConfig": "proxy.conf.json"
},
"configurations": {
"production": {
"browserTarget": "a:build:production"
},
"development": {
"browserTarget": "a:build:development"
}
},
"defaultConfiguration": "development"
},
"extract-i18n": {
"builder": "@angular-devkit/build-angular:extract-i18n",
"options": {
"browserTarget": "a:build"
}
},
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.spec.json",
"karmaConfig": "src/karma.conf.js",
"styles": ["src/styles.scss"],
"scripts": [],
"assets": ["src/favicon.ico", "src/assets"]
}
}
}
},
proxy.config.json
{
"/a": {
"target": "http://localhost:9080",
"secure": false
}
}
All the above code works in angular 13 version
but once I upgrade to angular 18, my api calls are failing with error
HttpErrorResponse
error
:
{error: SyntaxError: Unexpected token '<', "<!doctype "... is not valid JSON at JSON.parse (<anonymous>…, text: '<!doctype html>\r\n<html lang="en">\r\n<head>\n <scrip…ain.js" type="module">\x3C/script></body>\r\n</html>\r\n'}
headers
:
_HttpHeaders {normalizedNames: Map(0), lazyUpdate: null, lazyInit: ƒ}
message
:
**"Http failure during parsing for http://localhost:4200/a/Action/P"**
name
:
"HttpErrorResponse"
ok
:
false
status
:
200
statusText
:
"OK"
url
:
"http://localhost:4200/a/Action/P"
[[Prototype]]
:
HttpResponseBase
angular 18 package.json
{
"name": "w-test",
"version": "0.0.0",
"scripts": {
"ng": "ng",
"start": "ng serve",
"start-d": "ng serve --disable-host-check --port 4200 --public-host=dw.localhost.s.org:4200 a --host=0.0.0.0 ",
angular 18 angular.json
{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"version": 1,
"newProjectRoot": "projects",
"projects": {
"w-test": {
"projectType": "application",
"schematics": {
"@schematics/angular:component": {
"style": "scss"
}
},
"root": "",
"sourceRoot": "src",
"prefix": "app",
"architect": {
"build": {
"builder": "@angular-devkit/build-angular:application",
"options": {
"outputPath": "dist/w-test",
"index": "src/index.html",
"browser": "src/main.ts",
"polyfills": [
"zone.js"
],
"tsConfig": "tsconfig.app.json",
"inlineStyleLanguage": "scss",
"assets": [
{
"glob": "**/*",
"input": "public"
}
],
"styles": [
"src/styles.scss"
],
"scripts": []
},
"configurations": {
"production": {
"budgets": [
{
"type": "initial",
"maximumWarning": "500kB",
"maximumError": "1MB"
},
{
"type": "anyComponentStyle",
"maximumWarning": "2kB",
"maximumError": "4kB"
}
],
"outputHashing": "all"
},
"development": {
"optimization": false,
"extractLicenses": false,
"sourceMap": true
}
},
"defaultConfiguration": "production"
},
"serve": {
"builder": "@angular-devkit/build-angular:dev-server",
"configurations": {
"options": {
"proxyConfig": "proxy.conf.json"
},
"production": {
"buildTarget": "w-test:build:production"
},
"development": {
"buildTarget": "w-test:build:development"
}
},
"defaultConfiguration": "development"
},
"extract-i18n": {
"builder": "@angular-devkit/build-angular:extract-i18n"
},
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"polyfills": [
"zone.js",
"zone.js/testing"
],
"tsConfig": "tsconfig.spec.json",
"inlineStyleLanguage": "scss",
"assets": [
{
"glob": "**/*",
"input": "public"
}
],
"styles": [
"src/styles.scss"
],
"scripts": []
}
}
}
},
angular 18 proxy.config.json
{
"/a/**": {
"target": "http://dw.localhost:9080",
"secure": false,
"changeOrigin": true,
"pathRewrite": {
"^/a": ""
}
}
}
I tried everything but unable to figure out what has changes in angular 18 build system and what do i need to do to make it work.
any help will be highly appreciated.
From Angular 18 documentation, public-host option has no effects when using esbuild.
public-host
The URL that the browser client (or live-reload client, if enabled) should use
to connect to the development server. Use for a complex dev server setup, such
as one with reverse proxies. This option has no effect when using the
'application' or other esbuild-based builders.
You can try to use webpack builder in angular.json
"builder": "@angular-devkit/build-angular:application" --> "builder": "@angular-devkit/build-angular:browser".
Here is the list of available builders for your references. https://www.npmjs.com/package/@angular-devkit/build-angular