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47cf9b6980
if window.localStorage.config is null then JSON.parse returns an error about "u" not being valid (the word "undefined" is not valid JSON apparently :). So I test for null-ness first.
35 lines
783 B
JavaScript
35 lines
783 B
JavaScript
/**
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* This object storing and retrieving configuration from HTML5 local storage.
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* @module config/localStorage
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*/
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module.exports = LocalStorage;
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/**
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* @constructor
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*/
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function LocalStorage() {
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}
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/**
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* Reads the config out of the HTML5 local storage
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* and initializes the object config.
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* if config is null the default config will be used
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*/
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LocalStorage.prototype.read = function () {
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var raw = window.localStorage.getItem("config");
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var cf = (raw === null ? null : JSON.parse(raw));
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if (cf === null) {
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this.config = this.default_config;
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this.write();
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} else
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this.config = cf;
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};
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/**
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* Writes the config to HTML5 local storage
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*/
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LocalStorage.prototype.write = function () {
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window.localStorage.setItem("config", JSON.stringify(this.config));
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};
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