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38 lines
716 B
JavaScript
38 lines
716 B
JavaScript
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const ObservableStore = require('./index')
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//
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// LocalStorageStore
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//
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// uses localStorage instead of a cache
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//
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class LocalStorageStore extends ObservableStore {
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constructor (opts) {
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super()
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delete this._state
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this._opts = opts || {}
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if (!this._opts.storageKey) {
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throw new Error('LocalStorageStore - no "storageKey" specified')
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}
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this._storageKey = this._opts.storageKey
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}
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get() {
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try {
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return JSON.parse(global.localStorage[this._storageKey])
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} catch (err) {
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return undefined
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}
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}
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_put(newState) {
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global.localStorage[this._storageKey] = JSON.stringify(newState)
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this.emit('update', newState)
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}
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}
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module.exports = LocalStorageStore
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