Dynamic addition of script to <head> element in Angular is a common task for many developers

Question

Dynamic addition of script to <head> element in Angular is a common task for many developers

I have explored some examples that illustrate how to dynamically add a script with a URL in Angular

However, I am interested in adding this type of content to the <head>

<script>
  !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";
fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");
</script>

or

  <noscript>something</noscript>

or even both.

Do you have any ideas or examples?

angular typescript

Answer 1

Answer №1

To insert a script tag with custom code into the head of an HTML document, you can create a function that targets the first head tag and inserts the script before its first child:

function addScriptToHead() {
  const head = document.getElementsByTagName('head')[0];
  
  const script = document.createElement('script');
  script.innerHTML = 'your code goes here';
  
  head.insertBefore(script, head.firstChild);
}

Answer 2

To insert a script tag with custom code into the head of an HTML document, you can create a function that targets the first head tag and inserts the script before its first child:

function addScriptToHead() {
  const head = document.getElementsByTagName('head')[0];
  
  const script = document.createElement('script');
  script.innerHTML = 'your code goes here';
  
  head.insertBefore(script, head.firstChild);
}

Answer 3

Answer №2

If you need to access an element by its tag name, use the getElementByTagName() method first. Next, create a script variable and assign your code to it using the innerHTML attribute. Finally, insert this script variable into the head section of your HTML document.

Here is a sample code snippet to help you achieve this:

const head = document.getElementsByTagName('head')[0];
const script = document.createElement('script');
script.innerHTML = 'your code here';
head.insertBefore(script, head.firstChild);

Answer 4

If you need to access an element by its tag name, use the getElementByTagName() method first. Next, create a script variable and assign your code to it using the innerHTML attribute. Finally, insert this script variable into the head section of your HTML document.

Here is a sample code snippet to help you achieve this:

const head = document.getElementsByTagName('head')[0];
const script = document.createElement('script');
script.innerHTML = 'your code here';
head.insertBefore(script, head.firstChild);

Answer 5

Answer №3

If you're open to integrating a fresh library, consider utilizing the HeadService from @bespunky/angular-zen. This service offers a secure and typed access to the head element.

Your component or service could resemble the following setup:

 import { Component, OnInit } from '@angular/core';
 import { HeadService       } from '@bespunky/angular-zen/core';

 @Component({
     selector   : 'zen-head-service-demo',
     templateUrl: './head-service-demo.component.html',
     styleUrls  : ['./head-service-demo.component.css']
 })
 export class HeadServiceDemoComponent implements OnInit
 {
     constructor(private head: HeadService) { }

     ngOnInit()
     {
         this.head.addElement('script', /* config object or config function */);
     }
 }

Check out live examples here | Access the service documentation | Explore the Service API

🙋‍♂️ Don't forget to run
npm install @bespunky/angular-zen
and import CoreModule from the /core package.

TLDR

💡 The HeadService offers additional features like searching for elements by attributes, support for common elements (e.g. scripts and styles), etc.

💡 It's also designed for easy testing, allowing for document element mocking and spying functionalities.

Answer 6

If you're open to integrating a fresh library, consider utilizing the HeadService from @bespunky/angular-zen. This service offers a secure and typed access to the head element.

Your component or service could resemble the following setup:

 import { Component, OnInit } from '@angular/core';
 import { HeadService       } from '@bespunky/angular-zen/core';

 @Component({
     selector   : 'zen-head-service-demo',
     templateUrl: './head-service-demo.component.html',
     styleUrls  : ['./head-service-demo.component.css']
 })
 export class HeadServiceDemoComponent implements OnInit
 {
     constructor(private head: HeadService) { }

     ngOnInit()
     {
         this.head.addElement('script', /* config object or config function */);
     }
 }

Check out live examples here | Access the service documentation | Explore the Service API

🙋‍♂️ Don't forget to run
npm install @bespunky/angular-zen
and import CoreModule from the /core package.

TLDR

💡 The HeadService offers additional features like searching for elements by attributes, support for common elements (e.g. scripts and styles), etc.

💡 It's also designed for easy testing, allowing for document element mocking and spying functionalities.

Answer 7

Answer №4

Below is an example that I have implemented in my project:

<head>
    <div *ngIf="data">
        <title>{{data.response.field_meta_tag.description}}</title>
    </div>
</head>

To achieve this, you must utilize the rjxs operator to retrieve the data from your API. In my case, I have only applied it to the title but it can be used for other purposes as well.

Answer 8

Below is an example that I have implemented in my project:

<head>
    <div *ngIf="data">
        <title>{{data.response.field_meta_tag.description}}</title>
    </div>
</head>

To achieve this, you must utilize the rjxs operator to retrieve the data from your API. In my case, I have only applied it to the title but it can be used for other purposes as well.

Dynamic addition of script to <head> element in Angular is a common task for many developers

Answer №1

Answer №2

Answer №3

TLDR

Answer №4

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