PHPStorm / html attributes not allowed / Custom attributes

Are those node_modules included (not excluded)?  Is it possible to provide us with a code sample?

Hello,

The node_modules are included, so they can be indexed

So it is angular code, here is a sample of the template

app.component.html
<ecl-app-shell-harmonised>
<div eclSiteHeaderEnvironment *eclSlot="'site-header-environment'">Development</div>

    <ng-template eclSlot="page-header-breadcrumb-items">
        <ecl-breadcrumb-harmonised-segment [href]="appOrganisationUrl" >{{appOrganisationName}}</ecl-breadcrumb-harmonised-segment>
        <ecl-breadcrumb-harmonised-segment *ngFor="let item  of siteBreadcrumbs" isCurrentPage="{{item.isCurrent}}" routerLink="{{item.url}}" >{{item.label}}</ecl-breadcrumb-harmonised-segment>
    </ng-template>

    <router-outlet></router-outlet>
</ecl-app-shell-harmonised>

PHPStorm does not "recognise" the

ecl-app-shell-harmonised

nor the extra attribute on the div

eclSiteHeaderEnvironment

Please provide your package.json as well.

{
    "name": "eui-angular-app",
    "version": "10.0.1",
    "license": "EUPL-1.1",
    "scripts": {
        "ng": "ng",
        "e2e": "ng e2e",
        "postinstall": "tslint --project ./src/tsconfig.app.json --fix",
        "start-mock-server-mean": "nodemon --ext js --watch ./mock/mean ./mock/mean/server.js",
        "start-mock-server": "nodemon --ext js --watch ./mock/json ./mock/json/server.js",
        "start-serve": "eui-scripts serve-app --configuration=proxy-mock",
        "start": "npm-run-all --parallel start-mock-server start-serve",
        "start-mean": "npm-run-all --parallel start-mock-server-mean start-serve",
        "start-proxy": "eui-scripts serve-app --configuration=proxy",
        "start-openid": "eui-scripts serve-app --configuration=local-openid",
        "build": "eui-scripts build-app",
        "build-dev": "eui-scripts build-app --configuration=dev",
        "build-prod": "eui-scripts build-app --configuration=production",
        "build-prod-skip-test": "eui-scripts build-app --configuration=production --extraWebpackConfig --skipTest",
        "build-prod-ci": "ncp tsconfig-ci.json tsconfig.json && npm run build-prod",
        "build-prod-stats": "eui-scripts build-app --configuration=production --extraWebpackConfig --statsJson",
        "pkg:init": "eui-cli -m",
        "pkg:clean": "eui-scripts clean-package",
        "pkg:clean-all": "eui-scripts clean-all",
        "pkg:test": "eui-scripts test-package",
        "pkg:build": "eui-scripts build-package",
        "pkg:build-deps": "eui-scripts build-deps",
        "pkg:build-all": "eui-scripts build-all",
        "pkg:build-element": "eui-scripts build-element",
        "build-prod:all": "npm run pkg:build-all && npm run build",
        "pkg:publish": "eui-scripts publish",
        "pkg:publish-all": "eui-scripts publish-all",
        "generate-changelog": "eui-scripts generate-changelog"
    },
    "private": true,
    "dependencies": {
        "@eui/deps-base": "10.0.1",
        "@eui/ecl-core": "10.0.0-beta.3",
        "@eui/ecl-styles": "10.0.0-beta.3"
    }
}