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56 lines
1.2 KiB
56 lines
1.2 KiB
'use strict'
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const valuesMap = new Map()
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class LocalStorage {
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getItem (key) {
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const stringKey = String(key)
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if (valuesMap.has(key)) {
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return String(valuesMap.get(stringKey))
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}
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return null
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}
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setItem (key, val) {
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valuesMap.set(String(key), String(val))
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}
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removeItem (key) {
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valuesMap.delete(key)
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}
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clear () {
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valuesMap.clear()
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}
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key (i) {
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if (arguments.length === 0) {
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throw new TypeError("Failed to execute 'key' on 'Storage': 1 argument required, but only 0 present.") // this is a TypeError implemented on Chrome, Firefox throws Not enough arguments to Storage.key.
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}
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var arr = Array.from(valuesMap.keys())
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return arr[i]
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}
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get length () {
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return valuesMap.size
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}
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}
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const instance = new LocalStorage()
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global.localStorage = new Proxy(instance, {
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set: function (obj, prop, value) {
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if (LocalStorage.prototype.hasOwnProperty(prop)) {
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instance[prop] = value
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} else {
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instance.setItem(prop, value)
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}
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return true
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},
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get: function (target, name) {
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if (LocalStorage.prototype.hasOwnProperty(name)) {
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return instance[name]
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}
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if (valuesMap.has(name)) {
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return instance.getItem(name)
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}
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}
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})
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