36 lines
575 B
JavaScript
36 lines
575 B
JavaScript
function isFreezable(obj) {
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if (obj === null) return false;
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return Array.isArray(obj) ||
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typeof obj === 'object';
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}
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function needsFreezing(obj) {
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return isFreezable(obj) && !Object.isFrozen(obj);
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}
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function recur(obj) {
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Object.freeze(obj);
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Object.keys(obj).forEach((key) => {
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const value = obj[key];
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if (needsFreezing(value)) {
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recur(value);
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}
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});
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return obj;
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}
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export default function freeze(obj) {
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if (process.env.NODE_ENV === 'production') {
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return obj;
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}
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if (needsFreezing(obj)) {
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recur(obj);
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}
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return obj;
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}
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