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harden: block prototype pollution in index.js (CWE-1321) #197

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harden: block prototype pollution in index.js (CWE-1321) #197

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6 changes: 5 additions & 1 deletion src/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,11 @@ export default class GeoJSONVT {
/** @param {import('geojson').GeoJSON} data @param {Options} [options] */
constructor(data, options) {
/** @type {InternalOptions} */
const opts = this.options = Object.assign(Object.create(defaultOptions), options);
const opts = this.options = Object.create(defaultOptions);
for (const key of Object.keys(options || {})) {
if (key === '__proto__' || key === 'constructor' || key === 'prototype') continue;
opts[key] = /** @type {any} */ (options)[key];
}

const debug = opts.debug;

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