JavaScript中的this这一句话就能概括--"When a function of an object was called, the object will be passed into the execution context as this value"。但是很难从这句话就能理解this,之前看了很多东西,才感觉理解的差不多了,写了juejin.im,现在倒是感觉这句话概括的很精炼。
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