HTML DOM customElements get() method

The customElements get() method returns the constructor used for a previously-defined custom element.

Syntax:

constructor = customElements.get('custom-element-name');

Parameters:

name: The name of the custom element whose constructor you want to return.

Return value: This method returns the constructor for the custom element, or undefined if there is no custom element definition with that name.

Example: In this example, we will define a custom-element and then will get its constructor using this method.

<!DOCTYPE HTML>  
<html>   
<head> 
    <title>get() method</title> 
</head>    
<body style="text-align:center;"> 
    <h1 style="color:green;">   
        GeeksforGeeks   
    </h1>  
    <p>  
    HTML | customElements get() method 
    </p> 
    <button onclick = "Geeks();"> 
    click here to get constructor 
    </button> 
    <p id="a">  
    </p>        
    <script>  
        var a = document.getElementById("a"); 
        function Geeks() { 
            class CustomEl extends HTMLElement { 
                  constructor() { 
                    super() 
                    this.attachShadow({ mode: 'open' }) 
                    this.shadowRoot.innerHTML = ` 
                      <h1 style="color:green;">   
                        GeeksforGeeks Custom Element Data 
                    </h1> 
                    ` 
                      } 
                } 
window.customElements.define('gfg-custom-element', CustomEl); 
console.log(customElements.get('gfg-custom-element')); 
        }  
  
    </script>  
</body>    
</html>

Output:

Before Clicking Button:

After Clicking Button: In the console, the constructor can be seen.

Supported Browsers:

Google Chrome
Edge
Firefox
Safari
Opera

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