I have a template in the ponent with 4 div tags. The JavaScript function I want to call, changeValue(), is supposed to change the content of the first div from 1 to Yes!. I'm new to TypeScript and Angular 2, so I'm not sure how I can get the template to interact with the function from dtest2.js:
/**appponent.ts */
import { Component } from '@angular/core';
@Component({
selector: 'my-app',
template: `
<div id="boolean"><p id="bv">1</p></div>
<div id="numeric"><p id="nv">2</p></div>
<div id="string"><p id="sv">3</p></div>
<div id="enum"><p id="ev">4</p></div>
`
})
export class AppComponent { }
//dtest2.js
function changeValue(){
var newVal= "Yes!";
document.getElementById("bv").innerHTML= newVal;
}
changeValue();<html>
<head>
<title>Angular 2 QuickStart</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="styles.css">
<!-- Polyfill(s) for older browsers -->
<script src="node_modules/core-js/client/shim.min.js"></script>
<script src="node_modules/zone.js/dist/zone.js"></script>
<script src="node_modules/reflect-metadata/Reflect.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<script src="file:^html/angular/app/bs.min.js"></script>
<script src="file:^html/dtest2.js"></script>
<script src="systemjs.config.js"></script>
<script>
System.import('app').catch(function(err){ console.error(err); });
</script>
</head>
<body>
<my-app>Loading...</my-app>
</body>
</html>I have a template in the ponent with 4 div tags. The JavaScript function I want to call, changeValue(), is supposed to change the content of the first div from 1 to Yes!. I'm new to TypeScript and Angular 2, so I'm not sure how I can get the template to interact with the function from dtest2.js:
/**app.ponent.ts */
import { Component } from '@angular/core';
@Component({
selector: 'my-app',
template: `
<div id="boolean"><p id="bv">1</p></div>
<div id="numeric"><p id="nv">2</p></div>
<div id="string"><p id="sv">3</p></div>
<div id="enum"><p id="ev">4</p></div>
`
})
export class AppComponent { }
//dtest2.js
function changeValue(){
var newVal= "Yes!";
document.getElementById("bv").innerHTML= newVal;
}
changeValue();<html>
<head>
<title>Angular 2 QuickStart</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="styles.css">
<!-- Polyfill(s) for older browsers -->
<script src="node_modules/core-js/client/shim.min.js"></script>
<script src="node_modules/zone.js/dist/zone.js"></script>
<script src="node_modules/reflect-metadata/Reflect.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<script src="file:^html/angular/app/bs.min.js"></script>
<script src="file:^html/dtest2.js"></script>
<script src="systemjs.config.js"></script>
<script>
System.import('app').catch(function(err){ console.error(err); });
</script>
</head>
<body>
<my-app>Loading...</my-app>
</body>
</html>3 Answers
Reset to default 2Is there a special reason to use this external js function?
It would be better to use Angular's binding methods to solve your problem..
/**app.ponent.ts */
import { Component } from '@angular/core';
declare function changeValues(anyArgs: string, canBeHere: string) : void;
@Component({
selector: 'my-app',
template: `
<div id="boolean"><p id="bv">{{booleanValue ? 'Yes' : 'No'}}</p></div>
<div id="numeric"><p id="nv">2</p></div>
<div id="string"><p id="sv">3</p></div>
<div id="enum"><p id="ev">4</p></div>
`
})
export class AppComponent {
booleanValue: boolean = true;
constructor() { changeValues(...); }
anyFunctionToChangeTheValue() {
this.booleanValue = false;
}
}
Like the previous answer said, you can do this natively in Angular 2. However, here is how you can access functions outside of Angular2. You just need to declare the "window" object as a constant in your Angular ponent.
//our root app ponent
import {Component, NgModule, OnInit} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
const window: any = {};
@Component({
selector: 'my-app',
template: `
<div id="boolean"><p id="bv">1</p></div>
<div id="numeric"><p id="nv">2</p></div>
<div id="string"><p id="sv">3</p></div>
<div id="enum"><p id="ev">4</p></div>
`
})
export class App implements OnInit {
ngOnInit() {
changeValue();
}
}
@NgModule({
imports: [ BrowserModule ],
declarations: [ App ],
bootstrap: [ App ]
})
export class AppModule {}
Here is a working example.
You can use:
import { Component,ElementRef } from '@angular/core';
constructor(private elementRef:ElementRef) {};
ngAfterViewInit() {
var s = document.createElement("script");
s.type = "text/javascript";
s.src = "./app/custom.js";
this.elementRef.nativeElement.appendChild(s);
}