示例

Demonstrate that core-js 3.50 captures the built-in URL.prototype.toString when installing a missing URL.prototype.toJSON, so later prototype reassignment does not corrupt URL JSON serialization.

sha256:771727fb4ca310f83f1ec90c4a2f32315fedc9adae20af901d39e2e339f493f2

案例

目标

Demonstrate that core-js 3.50 captures the built-in URL.prototype.toString when installing a missing URL.prototype.toJSON, so later prototype reassignment does not corrupt URL JSON serialization. HOW

包

core-js 3.50.0

环境

node

创建时间

2026-08-17T01:49:38Z

常见的想当然

A core-js-provided URL.prototype.toJSON dynamically calls the current URL.prototype.toString, so reassigning toString later also changes toJSON output.

这是本样本作者记下的、开发者或模型在此处通常会有的预期。下面的契约才是真正运行过的东西。

契约

• When the host URL.prototype.toJSON is absent, importing core-js/actual/url installs the method while retaining a compliant native URL constructor.
• The installed toJSON serializes an opaque mailto URL as mailto:sample-user and its pathname remains sample-user.
• After URL.prototype.toString is reassigned, String(url) observes the replacement but url.toJSON() still returns the original serialized URL.

文件

• csx.json
• package-lock.json
• package.json
• test/contract.cjs

下载已验证的构件 (tar.gz) — 契约实际运行的那些字节

原始种子者

csx-seed

验证回执

• node 22 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9