1 files changed, 50 insertions, 0 deletions
diff --git a/node_modules/vue/src/server/write.js b/node_modules/vue/src/server/write.js
new file mode 100644
index 00000000..e6420818
--- /dev/null
+++ b/node_modules/vue/src/server/write.js
@@ -0,0 +1,50 @@
+/* @flow */
+
+const MAX_STACK_DEPTH = 1000
+const noop = _ => _
+
+const defer = typeof process !== 'undefined' && process.nextTick
+  ? process.nextTick
+  : typeof Promise !== 'undefined'
+    ? fn => Promise.resolve().then(fn)
+    : typeof setTimeout !== 'undefined'
+      ? setTimeout
+      : noop
+
+if (defer === noop) {
+  throw new Error(
+    'Your JavaScript runtime does not support any asynchronous primitives ' +
+    'that are required by vue-server-renderer. Please use a polyfill for ' +
+    'either Promise or setTimeout.'
+  )
+}
+
+export function createWriteFunction (
+  write: (text: string, next: Function) => boolean,
+  onError: Function
+): Function {
+  let stackDepth = 0
+  const cachedWrite = (text, next) => {
+    if (text && cachedWrite.caching) {
+      cachedWrite.cacheBuffer[cachedWrite.cacheBuffer.length - 1] += text
+    }
+    const waitForNext = write(text, next)
+    if (waitForNext !== true) {
+      if (stackDepth >= MAX_STACK_DEPTH) {
+        defer(() => {
+          try { next() } catch (e) {
+            onError(e)
+          }
+        })
+      } else {
+        stackDepth++
+        next()
+        stackDepth--
+      }
+    }
+  }
+  cachedWrite.caching = false
+  cachedWrite.cacheBuffer = []
+  cachedWrite.componentBuffer = []
+  return cachedWrite
+}