How Can I Optimize CSS Selectors for Opera Browsers?

CSS Selectors for Opera Optimization

While developing web applications, it may be necessary to tailor specific CSS styles specifically for Opera browsers. Here's a solution for achieving this goal:

Opera-Specific CSS Selectors

Opera supports a unique CSS selector that allows you to target elements exclusively within its browser. This selector, "-o-prefocus," enables the application of CSS rules specifically for Opera versions 10.63 and above.

Example Usage:

Consider the following code:

noindex:-o-prefocus, .class {
  color: #fff;
}

In this example, the "-o-prefocus" selector is prefixed before the ".class" rule. This ensures that the specified styles will be rendered solely in Opera browsers.

Browser Compatibility:

It's important to note that this technique is effective only for Opera 10.63 and later versions. Other browsers will ignore the "-o-prefocus" selector and render the CSS rules as if it were not present.

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