feat: stream rendering, closed #361 fixes #360

src/render/emitter.ts

@@ -1,29 +1,15 @@
-import { stringify, toValue } from '../util/underscore'
-
-export class Emitter {
-  public html: any = '';
-  public break = false;
-  public continue = false;
-  private keepOutputType? = false;
-
-  constructor (keepOutputType: boolean|undefined) {
-    this.keepOutputType = keepOutputType
-  }
-
-  public write (html: any) {
-    if (this.keepOutputType === true) {
-      html = toValue(html)
-    } else {
-      html = stringify(html)
-    }
-    // This will only preserve the type if the value is isolated.
-    // I.E:
-    // {{ my-port }} -> 42
-    // {{ my-host }}:{{ my-port }} -> 'host:42'
-    if (this.keepOutputType === true && typeof html !== 'string' && this.html === '') {
-      this.html = html
-    } else {
-      this.html = stringify(this.html) + stringify(html)
-    }
-  }
+export interface Emitter {
+  /**
+   * Write a html value into emitter
+   * @param html string, Drop or other primitive value
+   */
+  write (html: any): void;
+  /**
+   * Notify the emitter render has ended
+   */
+  end (): void;
+  /**
+   * Collect rendered string value immediately
+   */
+  collect (): string;
 }