未定义类型 未定义类型 这些类可以用作未定义类型。 Environment 的构造函数接受一个可以是那些类或一个 Undefined 的自定义子类的 undefined 参数。无论何时，这些对象创建或返回时，模板引擎都不能查出其名称或访问其属性。未定义值上的某些操作之后是允许的，而其它的会失败。 最接近常规 Python 行为的是 Strict...

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Language Support TypeScript JavaScript Language Features Compilation Options Runtime Environment Related Tutorials Language Support TypeScript Cocos Creator supports Ty...

Model index reference Index options fields name db_tablespace opclasses condition Model index reference Index classes ease creating database indexes. They can be added us...

Protocol options config.core.v3.QuicKeepAliveSettings config.core.v3.QuicProtocolOptions config.core.v3.UpstreamHttpProtocolOptions config.core.v3.AlternateProtocolsCacheOptions...

Publishing to Native Platforms Prerequisites Builder Configuration Common Builder Configuration for Publishing to Native Platforms Resource Server Address Polyfills Make Immedia...

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节流 节流 防抖动和节流本质是不一样的。防抖动是将多次执行变为最后一次执行，节流是将多次执行变成每隔一段时间执行。 /** * underscore 节流函数，返回函数连续调用时，func 执行频率限定为 次 / wait * * @param {function} func 回调函数 * @param {...

Statements & expressions If Type checks and casts In operator For loop for /in Array for Custom iterators Map for Range for Condition for Bare for C for Labelled ...

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