28 lines
826 B
JavaScript
28 lines
826 B
JavaScript
export class Store {
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constructor(storeValue, writable) {
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this._storeValue = storeValue;
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this._writable = writable;
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}
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// makes a copy deep enough that any modifications in the store
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// won't affect the original
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// used for transactions
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cloneStoreValue() {
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// assumes 1 level deep is enough, and that values will be replaced
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// rather than updated.
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if (Array.isArray(this._storeValue)) {
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return this._storeValue.slice();
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} else if (typeof this._storeValue === "object") {
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return Object.assign({}, this._storeValue);
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} else {
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return this._storeValue;
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}
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}
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assertWritable() {
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if (!this._writable) {
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throw new Error("Tried to write in read-only transaction");
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}
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}
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}
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