Webpack hot loader for svelte components
$ npm install svelte-hot-loader --save-dev
This loader does not replace svelte-loader. It is meant to be chained in conjuction with svelte-loader. For example:
module:{
rules:[
...
{
test: /\.html$/,
exclude: /node_modules/,
use: [
{
loader: "svelte-hot-loader" //<-- chained to load output from svelte-loader
},
{
loader: 'svelte-loader',
query: {
dev:true,
emitCss: false,
store: true
}
}
]
}
...
]
}
A full example can be found in the example repo.
- Turning
dev
mode on (dev:true
) insvelte-loader
is not necessary. - Modifying the HTML (template) part of your component will replace and re-render the changes in place. Current local state will also be preserved.
- When modifying the
<script>
part of your component, instances will be replaced and re-rendered in place too. However if your component has lifecycle methods that produce global side-effects, you might need to reload the whole page. - During development do not use
extract-text-webpack-plugin
to extract the component's css into another file. Let it get handled by svelte. You can always turn it on when creating production builds - If you are using
svelte/store
, a full reload is required if you modifystore
properties
Components will not be hot reloaded in the following situations:
process.env.NODE_ENV === 'production'
- Webpack is minifying code
- Webpack's
target
isnode
(i.e SSR components)
PRs and issues always welcome 😄
Heavily inspired by prior art of react-hot-loader and vue-hot-loader