mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-11-23 10:30:04 +01:00
42 lines
1.2 KiB
JavaScript
42 lines
1.2 KiB
JavaScript
|
|
||
|
|
/**
|
||
|
|
* Freezes the Promise global and prevents its reassignment.
|
||
|
|
*/
|
||
|
|
const deepFreeze = require('deep-freeze-strict')
|
||
|
|
|
||
|
|
if (
|
||
|
|
process.env.IN_TEST !== 'true' &&
|
||
|
|
process.env.METAMASK_ENV !== 'test'
|
||
|
|
) {
|
||
|
|
freeze(global, 'Promise')
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Makes a key:value pair on a target object immutable, with limitations.
|
||
|
|
* The key cannot be reassigned or deleted, and the value is recursively frozen
|
||
|
|
* using Object.freeze.
|
||
|
|
*
|
||
|
|
* Because of JavaScript language limitations, this is does not mean that the
|
||
|
|
* value is completely immutable. It is, however, better than nothing.
|
||
|
|
*
|
||
|
|
* @param {Object} target - The target object to freeze a property on.
|
||
|
|
* @param {String} key - The key to freeze.
|
||
|
|
* @param {any} [value] - The value to freeze, if different from the existing value on the target.
|
||
|
|
* @param {boolean} [enumerable=true] - If given a value, whether the property is enumerable.
|
||
|
|
*/
|
||
|
|
function freeze (target, key, value, enumerable = true) {
|
||
|
|
|
||
|
|
const opts = {
|
||
|
|
configurable: false, writable: false,
|
||
|
|
}
|
||
|
|
|
||
|
|
if (value !== undefined) {
|
||
|
|
opts.value = deepFreeze(value)
|
||
|
|
opts.enumerable = enumerable
|
||
|
|
} else {
|
||
|
|
target[key] = deepFreeze(target[key])
|
||
|
|
}
|
||
|
|
|
||
|
|
Object.defineProperty(target, key, opts)
|
||
|
|
}
|