70 lines
2.0 KiB
JavaScript
70 lines
2.0 KiB
JavaScript
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'use strict';
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/** @typedef {`$${import('.').InternalSlot}`} SaltedInternalSlot */
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/** @typedef {{ [k in SaltedInternalSlot]?: unknown }} SlotsObject */
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var hasOwn = require('hasown');
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/** @type {import('side-channel').Channel<object, SlotsObject>} */
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var channel = require('side-channel')();
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var $TypeError = require('es-errors/type');
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/** @type {import('.')} */
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var SLOT = {
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assert: function (O, slot) {
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if (!O || (typeof O !== 'object' && typeof O !== 'function')) {
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throw new $TypeError('`O` is not an object');
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}
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if (typeof slot !== 'string') {
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throw new $TypeError('`slot` must be a string');
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}
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channel.assert(O);
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if (!SLOT.has(O, slot)) {
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throw new $TypeError('`' + slot + '` is not present on `O`');
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}
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},
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get: function (O, slot) {
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if (!O || (typeof O !== 'object' && typeof O !== 'function')) {
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throw new $TypeError('`O` is not an object');
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}
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if (typeof slot !== 'string') {
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throw new $TypeError('`slot` must be a string');
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}
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var slots = channel.get(O);
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// eslint-disable-next-line no-extra-parens
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return slots && slots[/** @type {SaltedInternalSlot} */ ('$' + slot)];
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},
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has: function (O, slot) {
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if (!O || (typeof O !== 'object' && typeof O !== 'function')) {
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throw new $TypeError('`O` is not an object');
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}
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if (typeof slot !== 'string') {
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throw new $TypeError('`slot` must be a string');
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}
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var slots = channel.get(O);
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// eslint-disable-next-line no-extra-parens
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return !!slots && hasOwn(slots, /** @type {SaltedInternalSlot} */ ('$' + slot));
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},
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set: function (O, slot, V) {
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if (!O || (typeof O !== 'object' && typeof O !== 'function')) {
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throw new $TypeError('`O` is not an object');
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}
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if (typeof slot !== 'string') {
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throw new $TypeError('`slot` must be a string');
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}
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var slots = channel.get(O);
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if (!slots) {
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slots = {};
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channel.set(O, slots);
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}
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// eslint-disable-next-line no-extra-parens
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slots[/** @type {SaltedInternalSlot} */ ('$' + slot)] = V;
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}
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};
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if (Object.freeze) {
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Object.freeze(SLOT);
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}
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module.exports = SLOT;
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