Bookmarklet for Resetting CSS StylesIn this bookmarklet, you

I'm attempting to attach a new <div> element with custom content using a bookmarklet and apply inline CSS. However, the issue I am facing is that the styles from the parent page are interfering with my div.

What would be the best approach to ensure that my bookmarklet styles take precedence over any styles provided by the parent page?

One possible solution could be to set all CSS properties for each element within the div. Is this a recommended practice? Where can I find a comprehensive list of CSS properties?

I came across cleanstate.css, which seems to offer a reset solution.

Would a JavaScript solution be more effective? For instance, detecting which styles are being applied by the parent page and resetting them to default values. It's worth noting that jQuery will be available in this bookmarklet.

javascriptjquerycssresetbookmarklet

Answer №1

The best approach is to use an iframe element.

You can dynamically create it and set its content using the 'javascript:' protocol within the src attribute.

var iframe = document.createElement('iframe');
  
iframe.src = "javascript:'<div> Your Content </div>'";
document.body.appendChild(iframe);

Another option is to insert an empty iframe, wait for it to load, and then update the iframe document as needed. Here's an example:

var iframe = document.createElement('iframe');

iframe.src = 'about:blank';
document.body.appendChild(iframe);

iframe.onload = function() {
  iframe.contentWindow.document.body.innerHTML = '<div> Your content </div>';
};

Alternatively, you could create a separate .html page and embed it within an iframe. 

<iframe src="http://example.com">
However, keep in mind that you will need to host the page somewhere and additional scripting may be required for the document to access the parent page (using .postMessage()).

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