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通过运行机制看this绑定 、作用域、作用域链和闭包
source link: https://juejin.im/post/5dde27615188256ebd1618fb
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一、引言 了解js的运行机制有助于我们在日常的工作中，写成高质量的代码，减少bug的产生，节约维护成本。也有助于我们通过造火箭的面试。 了解JavaScript引擎。 通过运行机制看作用域和作用域链。 通过运行机制理解this的绑定和优先级。 通过运行机制理
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