tag:order-of-execution

为什么这些 JavaScript 片段即使都遇到错误，但行为却不同？

var a = {}var b = {}try{a.x.y = b.e = 1 // Uncaught TypeError: Cannot set property 'y' of undefined} catch(err) {console.error(err);}console.log(b.e) // 1var a = {}var b = {}try {a.x.y.z = b.e = 1 //

javascript operators order-of-execution

2019-02-12