Need to insert Script tag in angular 2

Having scripts in your views is usually a bad practice. If you insist on doing this you can use this component:

scripthack.component.html:

<div #script style.display="none">
  <ng-content></ng-content>
</div>

scripthack.component.ts:

import { Component, ElementRef, ViewChild, Input } from '@angular/core';

@Component({
    selector: 'script-hack',
    templateUrl: './scripthack.component.html'
})
export class ScriptHackComponent {

    @Input()
    src: string;

    @Input()
    type: string;

    @ViewChild('script') script: ElementRef;

    convertToScript() {
        var element = this.script.nativeElement;
        var script = document.createElement("script");
        script.type = this.type ? this.type : "text/javascript";
        if (this.src) {
            script.src = this.src;
        }
        if (element.innerHTML) {
            script.innerHTML = element.innerHTML;
        }
        var parent = element.parentElement;
        parent.parentElement.replaceChild(script, parent);
    }

    ngAfterViewInit() {
        this.convertToScript();
    }
}

usage (inline):

<script-hack>alert('hoi');</script-hack>

usage (external):

<script-hack src="https://platform.twitter.com/widgets.js" type="text/javascript"></script-hack>