fix(compiler): properly shim :host:before and :host(:before) (#12171)

fixes #12165
2016-10-10 09:15:15 -07:00
parent f782b08f58
commit aa92512ac6
2 changed files with 11 additions and 5 deletions
--- a/modules/@angular/compiler/src/shadow_css.ts
+++ b/modules/@angular/compiler/src/shadow_css.ts
@ -381,7 +381,10 @@ export class ShadowCss {

    if (_polyfillHostRe.test(selector)) {
      const replaceBy = this.strictStyling ? `[${hostSelector}]` : scopeSelector;
-      return selector.replace(_polyfillHostNoCombinatorRe, (hnc, selector) => selector + replaceBy)
+      return selector
+          .replace(
+              _polyfillHostNoCombinatorRe,
+              (hnc, selector) => selector[0] === ':' ? replaceBy + selector : selector + replaceBy)
          .replace(_polyfillHostRe, replaceBy + ' ');
    }