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svelte-hot-loader
Advanced tools
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$/,
exclude: /node_modules/,
use: [
{
loader: "svelte-hot-loader" //<-- chained to load output from svelte-loader
},
{
loader: 'svelte-loader',
query: {
dev:true,
emitCss: false,
store: true
}
}
]
}
...
]
}
A full example can be found in the example repo.
_rerender
and _register
are reserved method names, please don't use them in methods:{...}
dev
mode on (dev:true
) in svelte-loader
is not necessary.<script>
part of your component, instances will be replaced and re-rendered in place too.
However if your component has lifecycle methods that produce global side-effects, you might need to reload the whole page.extract-text-webpack-plugin
to extract the component's css into another file. Let it get handled by svelte. You can always turn it on when creating production buildssvelte/store
, a full reload is required if you modify store
propertiesComponents will not be hot reloaded in the following situations:
process.env.NODE_ENV === 'production'
target
is node
(i.e SSR components)Sometimes it might be necessary for some components to avoid state preservation on hot-reload. Or in simpler terms, you don't want the local state of the component to remain as it is after a hot-reload.
This can be configured on a per-component basis by adding a property noPreserveState = true
to the component's constructor using the setup()
method. For example:
export default {
setup(comp){
comp.noPreserveState = true;
},
data(){return {...}},
oncreate(){...}
}
Or, on a global basis by adding {noPreserveState: true}
to the webpack loader config. For example:
{
test: /\.html$/,
exclude: /node_modules/,
use: [
{
loader: "svelte-hot-loader",
query: { noPreserveState: true } //<-- config option
},
{
loader: 'svelte-loader',
query: {
dev:true,
emitCss: false,
store: true
}
}
]
}
Please Note: If you are using svelte/store
, noPreserveState
has no effect on store
properties. Neither locally, nor globally.
PRs and issues always welcome :smile:
Heavily inspired by prior art of react-hot-loader and vue-hot-loader
FAQs
webpack hot loader for svelte components
We found that svelte-hot-loader demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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