62 lines
1.5 KiB
JavaScript
62 lines
1.5 KiB
JavaScript
'use strict';
|
|
|
|
var hasOwn = require('hasown');
|
|
var channel = require('side-channel')();
|
|
|
|
var $TypeError = require('es-errors/type');
|
|
|
|
var SLOT = {
|
|
assert: function (O, slot) {
|
|
if (!O || (typeof O !== 'object' && typeof O !== 'function')) {
|
|
throw new $TypeError('`O` is not an object');
|
|
}
|
|
if (typeof slot !== 'string') {
|
|
throw new $TypeError('`slot` must be a string');
|
|
}
|
|
channel.assert(O);
|
|
if (!SLOT.has(O, slot)) {
|
|
throw new $TypeError('`' + slot + '` is not present on `O`');
|
|
}
|
|
},
|
|
get: function (O, slot) {
|
|
if (!O || (typeof O !== 'object' && typeof O !== 'function')) {
|
|
throw new $TypeError('`O` is not an object');
|
|
}
|
|
if (typeof slot !== 'string') {
|
|
throw new $TypeError('`slot` must be a string');
|
|
}
|
|
var slots = channel.get(O);
|
|
return slots && slots['$' + slot];
|
|
},
|
|
has: function (O, slot) {
|
|
if (!O || (typeof O !== 'object' && typeof O !== 'function')) {
|
|
throw new $TypeError('`O` is not an object');
|
|
}
|
|
if (typeof slot !== 'string') {
|
|
throw new $TypeError('`slot` must be a string');
|
|
}
|
|
var slots = channel.get(O);
|
|
return !!slots && hasOwn(slots, '$' + slot);
|
|
},
|
|
set: function (O, slot, V) {
|
|
if (!O || (typeof O !== 'object' && typeof O !== 'function')) {
|
|
throw new $TypeError('`O` is not an object');
|
|
}
|
|
if (typeof slot !== 'string') {
|
|
throw new $TypeError('`slot` must be a string');
|
|
}
|
|
var slots = channel.get(O);
|
|
if (!slots) {
|
|
slots = {};
|
|
channel.set(O, slots);
|
|
}
|
|
slots['$' + slot] = V;
|
|
}
|
|
};
|
|
|
|
if (Object.freeze) {
|
|
Object.freeze(SLOT);
|
|
}
|
|
|
|
module.exports = SLOT;
|