fix: broken links (#1406)

Author: kazupon

src/guide/essentials/component-basics.md

@@ -6,7 +6,7 @@ Components allow us to split the UI into independent and reusable pieces, and th
 
 <!-- https://www.figma.com/file/qa7WHDQRWuEZNRs7iZRZSI/components -->
 
-This is very similar to how we nest native HTML elements, but Vue implements its own component model that allow us to encapsulate custom content and logic in each component. Vue also plays nicely with native Web Components. If you are curious about the relationship between Vue Components and native Web Components, [read more here](http://localhost:3000/guide/extras/web-components.html).
+This is very similar to how we nest native HTML elements, but Vue implements its own component model that allow us to encapsulate custom content and logic in each component. Vue also plays nicely with native Web Components. If you are curious about the relationship between Vue Components and native Web Components, [read more here](/guide/extras/web-components.html).
 
 ## Defining a Component
 
@@ -93,7 +93,7 @@ The example above defines a single component and exports it as the default expor
 ## Using a Component
 
 :::tip
-We will be using SFC syntax for the rest of this guide - the concepts around components are the same regardless of whether you are using a build step for not. The [Examples](http://localhost:3000/examples/) section shows component usage in both scenarios.
+We will be using SFC syntax for the rest of this guide - the concepts around components are the same regardless of whether you are using a build step for not. The [Examples](/examples/) section shows component usage in both scenarios.
 :::
 
 To use a child component, we need to import it in the parent component. Assuming we placed our counter component inside a file called `ButtonCounter.vue`, the component will be exposed as the file's default export:

src/guide/essentials/watchers.md

@@ -346,7 +346,7 @@ watchPostEffect(() => {
 
 ## `this.$watch()` \*
 
-It's also possible to imperatively create watchers using the [`$watch()` instance method](http://localhost:3000/api/component-instance.html#watch):
+It's also possible to imperatively create watchers using the [`$watch()` instance method](/api/component-instance.html#watch):
 
 ```js
 export default {