This content originally appeared on DEV Community and was authored by sibaspage
How angular starts executing?
- There is file name called angular.json which act like a configuration for the whole application.
Its looks like this
"build": {
"builder": "@angular-devkit/build-angular:browser",
"options": {
"outputPath": "dist/angular-starter",
"index": "src/index.html",
**"main": "src/main.ts",**
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.app.json",
"aot": false,
"assets": [
"src/favicon.ico",
"src/assets"
],
"styles": [
"./node_modules/@angular/material/prebuilt-themes/deeppurple-amber.css",
"src/style.css"
]
}
}
The entry point will be mentioned in the "main" section.
Which is "main.ts" here.
The main.ts file creates a browser environment to run the app.
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
Along with this it called a function called "bootstrapModule"
platformBrowserDynamic().bootstrapModule(AppModule)
In the above code AppModule is getting bootstrapped.
AppModule is looks like this
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule
],
providers: [],
entryComponents: [],
bootstrap: [AppComponent]
})
export class AppModule { }
If you see in the AppModule AppComponent is getting bootstrapped.
The AppComponent is defined in app.component.ts file.
Which looks like below
import { Component } from '@angular/core';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
title = 'angular';
}
These file interacts with the webpage and serves data to it.
After this its calls index.html which looks like this
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Angular</title>
<base href="/">
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<app-root></app-root>
</body>
</html>
The html template of the root component is displayed inside the <app-root></app-root>
This content originally appeared on DEV Community and was authored by sibaspage
sibaspage | Sciencx (2021-12-10T10:07:38+00:00) How angular starts. Retrieved from https://www.scien.cx/2021/12/10/how-angular-starts/
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