1 files changed, 93 insertions, 0 deletions
diff --git a/node_modules/vue/src/platforms/web/runtime/modules/style.js b/node_modules/vue/src/platforms/web/runtime/modules/style.js
new file mode 100644
index 00000000..29e1c3c1
--- /dev/null
+++ b/node_modules/vue/src/platforms/web/runtime/modules/style.js
@@ -0,0 +1,93 @@
+/* @flow */
+
+import { getStyle, normalizeStyleBinding } from 'web/util/style'
+import { cached, camelize, extend, isDef, isUndef } from 'shared/util'
+
+const cssVarRE = /^--/
+const importantRE = /\s*!important$/
+const setProp = (el, name, val) => {
+  /* istanbul ignore if */
+  if (cssVarRE.test(name)) {
+    el.style.setProperty(name, val)
+  } else if (importantRE.test(val)) {
+    el.style.setProperty(name, val.replace(importantRE, ''), 'important')
+  } else {
+    const normalizedName = normalize(name)
+    if (Array.isArray(val)) {
+      // Support values array created by autoprefixer, e.g.
+      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
+      // Set them one by one, and the browser will only set those it can recognize
+      for (let i = 0, len = val.length; i < len; i++) {
+        el.style[normalizedName] = val[i]
+      }
+    } else {
+      el.style[normalizedName] = val
+    }
+  }
+}
+
+const vendorNames = ['Webkit', 'Moz', 'ms']
+
+let emptyStyle
+const normalize = cached(function (prop) {
+  emptyStyle = emptyStyle || document.createElement('div').style
+  prop = camelize(prop)
+  if (prop !== 'filter' && (prop in emptyStyle)) {
+    return prop
+  }
+  const capName = prop.charAt(0).toUpperCase() + prop.slice(1)
+  for (let i = 0; i < vendorNames.length; i++) {
+    const name = vendorNames[i] + capName
+    if (name in emptyStyle) {
+      return name
+    }
+  }
+})
+
+function updateStyle (oldVnode: VNodeWithData, vnode: VNodeWithData) {
+  const data = vnode.data
+  const oldData = oldVnode.data
+
+  if (isUndef(data.staticStyle) && isUndef(data.style) &&
+    isUndef(oldData.staticStyle) && isUndef(oldData.style)
+  ) {
+    return
+  }
+
+  let cur, name
+  const el: any = vnode.elm
+  const oldStaticStyle: any = oldData.staticStyle
+  const oldStyleBinding: any = oldData.normalizedStyle || oldData.style || {}
+
+  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
+  const oldStyle = oldStaticStyle || oldStyleBinding
+
+  const style = normalizeStyleBinding(vnode.data.style) || {}
+
+  // store normalized style under a different key for next diff
+  // make sure to clone it if it's reactive, since the user likely wants
+  // to mutate it.
+  vnode.data.normalizedStyle = isDef(style.__ob__)
+    ? extend({}, style)
+    : style
+
+  const newStyle = getStyle(vnode, true)
+
+  for (name in oldStyle) {
+    if (isUndef(newStyle[name])) {
+      setProp(el, name, '')
+    }
+  }
+  for (name in newStyle) {
+    cur = newStyle[name]
+    if (cur !== oldStyle[name]) {
+      // ie9 setting to null has no effect, must use empty string
+      setProp(el, name, cur == null ? '' : cur)
+    }
+  }
+}
+
+export default {
+  create: updateStyle,
+  update: updateStyle
+}