This technique will be helpful for you if you want to open some user-specified code in an iframe dynamically and show output. Then we opened the iframe and added the HTML code which we want to run inside the iframe using the document.write() function, and then we closed the iframe element.

Then we used the appendChild() function to append it to some DOM element on our HTML page, in this case, a tag with id attribute as myDIV. In the JavaScript code above, we first used the document.createElement() function to create an iframe element. In the code above, the variable htmlcode will hold the HTML code that you want to run inside the iframe. div tag in which iframe will be added should have id attribute with value myDIVĭocument.getElementById('myDIV').appendChild(iframe) var iframe = document.createElement('iframe') But one thing is for sure, we will have to use document.createElement('iframe') to create an iframe dynamically using JavaScript, and we will have to append it to the DOM of our HTML page, for which we can either simply add the iframe to the tag like in the above example, or we can add the iframe inside a particular div tag.īelow is the code, using which we can create an iframe dynamically and then add HTML code to it. Iframe.src = 'data:text/html charset=utf-8,' + encodeURI(html) īut this code will not work for complex HTML code. The code below can be used to add simple HTML code, to a dynamically created iframe in your HTML page using JavaScript. Let's start with a basic solution to this problem. Well, if this is the problem you are facing, you are in the right place. If you want to create an iframe on your webpage dynamically using JavaScript and want to run some HTML code in it, the first solution that will come to your mind would be to save the HTML code in some file and then use that file in the src attribute of the iframe tag to create an iframe and add the HTML code to it.īut how can you do so dynamically, where you do not have any HTML file to show inside the iframe, rather you just have the HTML/CSS code.

Html iframe code example