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HomeWeb Front-endCSS TutorialDetailed explanation of css3 linear gradient syntax (code example)

This article brings you a detailed explanation of CSS3 linear gradient syntax (code example). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Full syntax for linear gradient:

.demo  {   
    background: linear-gradient(to left, black, white);
}

Effect:

Detailed explanation of css3 linear gradient syntax (code example)

Compatibility writing method:

To make the linear gradient applicable to all supported browsers, you can do this:

.demo {	
	/* IE6 & IE7 */
	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#000000', endColorstr='#ffffff');
	
	/* IE8+ */
	-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr='#000000', endColorstr='#ffffff')";
	
	/* Safari 4 +,Chrome 2+  */
	background: -webkit-gradient(linear, left, right, color-stop(0%, #000000), color-stop(100%, #ffffff));
	
	/* Safari 5.1 - 6.0 */
	background: -webkit-linear-gradient(right, black, white);
	
	/* Firefox 3.6 - 15 */
	background: -moz-linear-gradient(right, black, white);
	
	/* Opera 11.1 - 12.0 */
	background: -o-linear-gradient(right, black, white);
	
	/* 标准的语法 */
	background: linear-gradient(to left, black, white);
	
}

The effect is as shown above.

Gradient angle or starting point

A linear gradient is a gradient created by specifying a straight gradient line and then placing several colors along the line. We can provide a direction for the gradient through settings.

We can set the direction of the gradient line in two ways:

1. Declare the angle used by the gradient.

2. Use keywords to tell the browser Where does the gradient start.

In the above example, we tell it start from the right and go to the left, which is equivalent to the angle "-90deg". So this will produce the same result:

background: linear-gradient(-90deg, black, white);

Rendering:

Detailed explanation of css3 linear gradient syntax (code example)

The same result will also be displayed if the "270deg" angle is used, which is equivalent to " -90deg".

So we can use one of the position keywords (top, right, left, bottom) or just give it a specific angle numerically and it will figure out where to start.

End color and position

End position

With a simple linear gradient, you just Two termination colors are required without specifying a position (as in the example above). But in the following example:

background: linear-gradient(-90deg, black 50%, white 100%);

we will notice that this has included the position of each color in the percentage value.

Rendering:

Detailed explanation of css3 linear gradient syntax (code example)

This tells the browser where the gradient of each color should start and end (specify the length of the color). The browser will naturally figure out the actual gradient; you just tell it where the "gradual change" should "stop" entirely. In the example above, the "gradient" would stop on the left side of the element, so you won't see much (if any) full white in that element.

End Color

Adding color blocks is not very complicated anymore, just add any number of comma separated values. Here is the CSS for the rainbow:

.demo  {
   background:linear-gradient(to bottom,red 0%,orange 15%,yellow 30%,green 45%,blue 60%,indigo 75%,violet 100%)  ;
}

Rendering:

Detailed explanation of css3 linear gradient syntax (code example)

## Some notes on linear gradients:

1. CSS3 gradient is not an attribute, and the second is an image rendered by the browser;

2. You can use gradients at any position through url (image.jpg) in CSS;

3. The syntax for creating gradients is actually a function that takes various values ​​as parameters;

4. You can also specify repeated linear gradients, which can be useful in some cases. Very useful;

5. The value of the color end position can be expressed in percentage or pixels;

6. For the color scale, a negative percentage value (for example -20%) and percentages above 100% are perfectly valid.

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