¿Por qué la opacidad de CSS no funciona en IE7?

Why is CSS opacity not working in IE7?

It’s a nicer solution than CSS hacks when you need to support IE6 and some versions of IE7 PNG Images works great in such cases. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers.

These days, you really don’t have to worry about opacity being a difficult thing cross-browser. You just use the opacity property, like this: 0 is totally transparent (will not be visible at all, like visibility: hidden;) and 1 is totally opaque (default). Anything in between is partially transparent.

For instance, if CSS opacity is set to -0.5 it will be rounded to 0. Similarly, if CSS opacity is set to 1.25, it will be rounded to 1. CSS3 provides a short single line style rule to add CSS opacity for background color, which is supported by all modern browsers.

Alpha-channel : species the opacity value as a range between 0 and 1. 0 represents 0% opacity (or 100% transparency) and 1 represents 100% opacity (or 0% transparency). You can refer to our LambdaTest Experiment on RGBA Opacity background color property. Below is the code sample used for the cross browser compatibility experiment on RGBA Opacity.

For this website, IE6 visitors since January 1, 2011 account for about 0.5% of users, and in the last 30 days, that’s dropped to about 0.3%. You might have similar stats. For this reason, it’s more than likely that the only CSS hacks you’ll need are for IE7 and IE8.

CSS3 offers another method to implement transparency, doing so through an alpha channel that’s specified on a background color. Internet Explorer offers no support for this, but this can be worked around. For the CSS3-compliant browsers, here’s the syntax to set an alpha channel on the background of an element:

One of the important concepts of building table-less layouts using CSS is floating elements. In most cases, IE6 handles this with aplomb but in certain cases it fumbles. When faced with unbreakable content or elements whose width exceeds its parent’s width, it causes havoc with the layouts.

Then in your CSS, you would target IE7 or IE8 like this: Every browser will have a bottom margin of 20px on the element in question, but IE7 and IE8 will have a bottom margin of 10px and 15px respectively.

The easiest and most reliable way to center content for IE6 and below is to apply text-align: center to the parent element and then apply text-align: left to the element to be centered to make sure the text within it is aligned properly. 2. Staircase Effect Almost every web developer uses lists to create his navigation.

You cannot set the opacity on the background image, as it will be inherited by the elements inside the bg_img div (so h1 will inherit the same opacity) Try to use :before pseudo element here with position: absolute to make an overlay over image Try this one.

That is, don’t wrap it in the child DIV. Place it outside the parent in your HTML, then the opacity will not affect it. You then have to reposition the child using absolute positioning, to make it look like a real child element.

Give nomacs a try. It’s a free and open-source image editor that does all you require and more! You can adjust the opacity of the application with Ctrl + J and Ctrl + Shift + J and lock/unlock (to keep on top) the application window with Ctrl + Alt + Shift + B.