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d98cfcc581
This implements a flavor of vm.createContext() and friends
that creates a context without contextifying its global object.
This is suitable when users want to freeze the context (impossible
when the global is contextified i.e. has interceptors installed)
or speed up the global access if they don't need the interceptor
behavior.
```js
const vm = require('node:vm');
const context = vm.createContext(vm.constants.DONT_CONTEXTIFY);
// In contexts with contextified global objects, this is false.
// In vanilla contexts this is true.
console.log(vm.runInContext('globalThis', context) === context);
// In contexts with contextified global objects, this would throw,
// but in vanilla contexts freezing the global object works.
vm.runInContext('Object.freeze(globalThis);', context);
// In contexts with contextified global objects, freezing throws
// and won't be effective. In vanilla contexts, freezing works
// and prevents scripts from accidentally leaking globals.
try {
vm.runInContext('globalThis.foo = 1; foo;', context);
} catch(e) {
console.log(e); // Uncaught ReferenceError: foo is not defined
}
console.log(context.Array); // [Function: Array]
```
PR-URL: https://github.com/nodejs/node/pull/54394
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
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|---|---|---|
| .. | ||
| addon-verify.mjs | ||
| allhtml.mjs | ||
| alljson.mjs | ||
| apilinks.mjs | ||
| buildCSSForFlavoredJS.mjs | ||
| common.mjs | ||
| deprecationCodes.mjs | ||
| deps.mjs | ||
| generate.mjs | ||
| html.mjs | ||
| json.mjs | ||
| LICENSE | ||
| links-mapper.json | ||
| markdown.mjs | ||
| package-lock.json | ||
| package.json | ||
| README.md | ||
| stability.mjs | ||
| type-parser.mjs | ||
| versions.mjs | ||
Here's how the node docs work.
1:1 relationship from lib/<module>.js to doc/api/<module>.md.
Each type of heading has a description block.
# module
<!--introduced_in=v0.10.0-->
> Stability: 2 - Stable
A description and examples.
## module.property
<!-- YAML
added: v0.10.0
-->
* {type}
A description of the property.
## module.someFunction(x, y, [z=100])
<!-- YAML
added: v0.10.0
-->
* `x` {string} The description of the string.
* `y` {boolean} Should I stay or should I go?
* `z` {number} How many zebras to bring. **Default:** `100`.
A description of the function.
## module.someNewFunction(x)
<!-- YAML
added: REPLACEME
-->
* `x` {string} The description of the string.
This feature is not in a release yet.
## Event: 'blerg'
<!-- YAML
added: v0.10.0
-->
* `anArg` {type} A description of the listener argument.
Modules don't usually raise events on themselves. `cluster` is the
only exception.
## Class: SomeClass
<!-- YAML
added: v0.10.0
-->
A description of the class.
### SomeClass.classMethod(anArg)
<!-- YAML
added: v0.10.0
-->
* `anArg` {Object} Just an argument.
* `field` {string} `anArg` can have this field.
* `field2` {boolean} Another field. **Default:** `false`.
* Returns: {boolean} `true` if it worked.
A description of the method for humans.
### SomeClass.nextSibling()
<!-- YAML
added: v0.10.0
-->
* Returns: {SomeClass | null} The next `SomeClass` in line.
`SomeClass` must be registered in `tools/doc/type-parser.mjs`
to be properly parsed in `{type}` fields.
### SomeClass.someProperty
<!-- YAML
added: v0.10.0
-->
* {string}
The indication of what `someProperty` is.
### Event: 'grelb'
<!-- YAML
added: v0.10.0
-->
* `isBlerg` {boolean}
This event is emitted on instances of `SomeClass`, not on the module itself.
- Classes have (description, Properties, Methods, Events).
- Events have (list of listener arguments, description).
- Functions have (list of arguments, returned value if defined, description).
- Methods have (list of arguments, returned value if defined, description).
- Modules have (description, Properties, Functions, Classes, Examples).
- Properties have (type, description).