Why Does My CSS Background Image Shorthand Produce an 'Incorrect Operator' Error?

Background Image Error: Identifying the Incorrect Operator

When attempting to style a div element with a background image using shorthand notation, some users encounter an error regarding an incorrect operator:

Error: CSS: background: / is an incorrect operator.

To rectify this issue, it's crucial to understand the correct syntax for the background property. According to CSS specifications, the / character serves as a separator between the background-position and background-size properties.

The following CSS snippet demonstrates the correct usage:

div {
  height: 100%;
  background: url('...') 100% 0/4% no-repeat;
}

In this example, "url(...) 100% 0" represents the background's position, while "4%" indicates its size. It's important to note that while background-size is optional, it should be specified alongside background-position when using shorthand notation.

Omitting the / separator or misplacing it between properties can lead to the incorrect operator error. Additionally, it's essential to specify the size without position. For instance, the following CSS code is valid:

div {
  height: 100%;
  background: url(...) 100% 0 no-repeat;
}

The above is the detailed content of Why Does My CSS Background Image Shorthand Produce an 'Incorrect Operator' Error?. For more information, please follow other related articles on the PHP Chinese website!