let x;
{x} = {x: 1};Why is this reported wrong?
let x;
{x} = {x: 1};Why is this reported wrong?
x has been defined as undefined
the above code will be misspelled because the JavaScript engine interprets {x} as a block of code, resulting in a syntax error. This problem can only be solved by not writing curly braces at the beginning of the line and preventing JavaScript from interpreting it as a code block. reference
//
let x;
({x} = {x: 1}); from teacher Ruan Yifeng's explanation of "introduction to ES6 Standards" the code writing on page 23
will report an error because the js engine will interpret {x} as a code block, resulting in a syntax error. This problem can be solved only if does not write curly braces at the beginning of the line, preventing js from interpreting it as a code block.
({x} = {x: 1}) that's fine
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