Why Isn't My CSS `calc()` Function Working?

CSS calc() Function Anomaly: Understanding the Missing Spaces

The calc() function, a powerful CSS tool for performing mathematical operations on property values, has been generating confusion among developers. Despite its apparent simplicity, many have encountered issues in its implementation. This article investigates why the calc() function may not be working as expected.

Consider the following code snippet that doesn't seem to function as intended:

#abc {
  width: calc(100%-120px);
  height: 50px;
  background: black;
}

The calc() function is employed to calculate the width dynamically, but it fails to do so. The culprit behind this issue is a subtle oversight: the lack of spaces around the subtraction operator (-). The correct syntax requires spaces around the operator:

#abc {
  width: calc(100% - 120px);
  height: 50px;
  background: black;
}

This seemingly minor change ensures that the calc() function operates correctly, eliminating any confusion or frustration for developers. With this knowledge, you can harness the full potential of the calc() function to enhance the responsiveness and flexibility of your CSS code.

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