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node_modules/autoprefixer/lib/hacks/transform-decl.js

@@ -0,0 +1,79 @@
+let Declaration = require('../declaration')
+
+class TransformDecl extends Declaration {
+  /**
+   * Recursively check all parents for @keyframes
+   */
+  keyframeParents(decl) {
+    let { parent } = decl
+    while (parent) {
+      if (parent.type === 'atrule' && parent.name === 'keyframes') {
+        return true
+      }
+      ;({ parent } = parent)
+    }
+    return false
+  }
+
+  /**
+   * Is transform contain 3D commands
+   */
+  contain3d(decl) {
+    if (decl.prop === 'transform-origin') {
+      return false
+    }
+
+    for (let func of TransformDecl.functions3d) {
+      if (decl.value.includes(`${func}(`)) {
+        return true
+      }
+    }
+
+    return false
+  }
+
+  /**
+   * Replace rotateZ to rotate for IE 9
+   */
+  set(decl, prefix) {
+    decl = super.set(decl, prefix)
+    if (prefix === '-ms-') {
+      decl.value = decl.value.replace(/rotatez/gi, 'rotate')
+    }
+    return decl
+  }
+
+  /**
+   * Don't add prefix for IE in keyframes
+   */
+  insert(decl, prefix, prefixes) {
+    if (prefix === '-ms-') {
+      if (!this.contain3d(decl) && !this.keyframeParents(decl)) {
+        return super.insert(decl, prefix, prefixes)
+      }
+    } else if (prefix === '-o-') {
+      if (!this.contain3d(decl)) {
+        return super.insert(decl, prefix, prefixes)
+      }
+    } else {
+      return super.insert(decl, prefix, prefixes)
+    }
+    return undefined
+  }
+}
+
+TransformDecl.names = ['transform', 'transform-origin']
+
+TransformDecl.functions3d = [
+  'matrix3d',
+  'translate3d',
+  'translateZ',
+  'scale3d',
+  'scaleZ',
+  'rotate3d',
+  'rotateX',
+  'rotateY',
+  'perspective'
+]
+
+module.exports = TransformDecl