perf(core): use startsWith instead of indexOf (#989)

2020-04-20 15:44:20 -04:00
parent 9e26be2c26
commit 054ccecd58
4 changed files with 4 additions and 4 deletions
--- a/packages/runtime-core/src/componentEmits.ts
+++ b/packages/runtime-core/src/componentEmits.ts
@@ -73,7 +73,7 @@ export function emit(
  let handler = props[`on${capitalize(event)}`]
  // for v-model update:xxx events, also trigger kebab-case equivalent
  // for props passed via kebab-case
-  if (!handler && event.indexOf('update:') === 0) {
+  if (!handler && event.startsWith('update:')) {
    event = hyphenate(event)
    handler = props[`on${capitalize(event)}`]
  }