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It is safe to create the console properties for the global console at snapshot build time. Streams must still be created lazily however because they need special synchronization for the handles. PR-URL: https://github.com/nodejs/node/pull/51700 Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Chengzhong Wu <legendecas@gmail.com> Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
52 lines
1.8 KiB
JavaScript
52 lines
1.8 KiB
JavaScript
'use strict';
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// See https://console.spec.whatwg.org/#console-namespace
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// > For historical web-compatibility reasons, the namespace object
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// > for console must have as its [[Prototype]] an empty object,
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// > created as if by ObjectCreate(%ObjectPrototype%),
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// > instead of %ObjectPrototype%.
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// Since in Node.js, the Console constructor has been exposed through
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// require('console'), we need to keep the Console constructor but
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// we cannot actually use `new Console` to construct the global console.
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// Therefore, the console.Console.prototype is not
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// in the global console prototype chain anymore.
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const {
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FunctionPrototypeBind,
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ReflectDefineProperty,
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ReflectGetOwnPropertyDescriptor,
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ReflectOwnKeys,
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} = primordials;
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const {
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Console,
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kBindProperties,
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} = require('internal/console/constructor');
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const globalConsole = { __proto__: {} };
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// Since Console is not on the prototype chain of the global console,
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// the symbol properties on Console.prototype have to be looked up from
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// the global console itself. In addition, we need to make the global
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// console a namespace by binding the console methods directly onto
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// the global console with the receiver fixed.
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for (const prop of ReflectOwnKeys(Console.prototype)) {
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if (prop === 'constructor') { continue; }
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const desc = ReflectGetOwnPropertyDescriptor(Console.prototype, prop);
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if (typeof desc.value === 'function') { // fix the receiver
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const name = desc.value.name;
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desc.value = FunctionPrototypeBind(desc.value, globalConsole);
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ReflectDefineProperty(desc.value, 'name', { __proto__: null, value: name });
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}
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ReflectDefineProperty(globalConsole, prop, desc);
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}
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globalConsole[kBindProperties](true, 'auto');
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// This is a legacy feature - the Console constructor is exposed on
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// the global console instance.
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globalConsole.Console = Console;
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module.exports = globalConsole;
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