CCSS calc（）值deble debugging

確保您的公式遵守以下規則：White space is required on both sides of and - operators.

How to Debug Calculated Value:

You cannot directly access the "final" computed value because it varies depending on the property.

• Use javascript獲取特定屬性的計算值：

  var elem = document.querySelector（“。box”）; var prop = window.getComputedStyle（elem，null）.getPropertyValue（“ - variable”）; var Height = window.getComputedStyle（elem，null）.getPropertyValue（“ height”）; console.log（prop）; console.log（height）;