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59 lines
1.5 KiB
59 lines
1.5 KiB
'use strict'; |
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var GetIntrinsic = require('get-intrinsic'); |
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var has = require('has'); |
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var channel = require('side-channel')(); |
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var $TypeError = GetIntrinsic('%TypeError%'); |
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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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}, |
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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 $TypeError('`slot` must be a string'); |
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} |
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var slots = channel.get(O); |
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return slots && slots['$' + 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 $TypeError('`slot` must be a string'); |
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} |
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var slots = channel.get(O); |
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return !!slots && has(slots, '$' + 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 $TypeError('`slot` must be a string'); |
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} |
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var slots = channel.get(O); |
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if (!slots) { |
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slots = {}; |
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channel.set(O, slots); |
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} |
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slots['$' + 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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