How Can I Reliably Insert a Style Tag with JavaScript Across All Browsers?

Inserting a Style Tag with JavaScript: A Refined Approach

While the initial method presented can achieve the goal in certain browsers, it suffers from limitations and aesthetic issues. To overcome these obstacles, consider the following refined approach that encompasses broad browser compatibility and elegance.

Creating the Style Element

The key to creating a style tag with JavaScript lies in appending it to the head of the HTML document, rather than the body. By doing so, we can ensure consistent behavior across major browsers.

var head = document.head || document.getElementsByTagName('head')[0];
var style = document.createElement('style');
head.appendChild(style);

Setting Style Properties

To specify the style rules, we can set the type attribute of the style element to 'text/css' and either use cssText (for IE compatibility) or appendChild to define the actual style rules.

style.type = 'text/css';
if (style.styleSheet){
  // This is required for IE8 and below.
  style.styleSheet.cssText = css;
} else {
  style.appendChild(document.createTextNode(css));
}

Compatibility Matrix

To ensure browser compatibility, consider the following compatibility matrix:

Browser	Method 1	Method 2
Chrome	No	Yes
Firefox	Yes	Yes
Opera	Yes	Yes
IE7-9	No	Yes

Conclusion

By appending the style element to the and using the appropriate CSS setting methods, it is possible to create a style tag with JavaScript that works reliably and elegantly across popular browsers.

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