预期的声明或声明 javascript/typescript
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declaration or statement expected javascript/typescript
提问by XeniaSis
I am using Typescript 1.7 and React 0.14 with the new ES6 systax and I'm having the following destructuring assignment, as explained hereas well.
我使用的打字稿1.7和新ES6 systax阵营0.14，我有以下的解构赋值，如解释在这里为好。
let x0, x1, y0, y1;
if(this.props.viewport) {
{x0, x1, y0, y1} = this.props.viewport;
}
However, I'm getting the Declaration or statement expectederror. What am I doing wrong?
但是，我收到Declaration or statement expected错误消息。我究竟做错了什么？
Thanks
谢谢
回答by XeniaSis
So, I found the problem. Had to wrap the whole line in parenthesis. So the following is correct.
所以，我发现了问题。必须将整行括在括号中。所以以下是正确的。
let x0, x1, y0, y1;
if(this.props.viewport) {
({x0, x1, y0, y1} = this.props.viewport);
}
回答by Worm
I had this problem because I was trying to use caseas a variable name e.g. var case = .... Now I know this error was because caseis already used by JavaScript's Switch Statement.
我遇到了这个问题，因为我试图将其case用作变量名，例如var case = .... 现在我知道这个错误是因为caseJavaScript 的Switch Statement已经使用了。
