js with All In One

js with All In One

不推荐，要废弃 👎

function f(x, o) {
  with (o) {
    console.log(x);
  }
}

function f(foo, values) {
  with (foo) {
    console.log(values);
  }
}

var a, x, y;
var r = 10;

with (Math) {
  a = PI * r * r;
  x = r * cos(PI);
  y = r * sin(PI / 2);
}

refs

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/with

https://2ality.com/2011/06/with-statement.html

https://stackoverflow.com/questions/1931186/with-keyword-in-javascript

https://stackoverflow.com/questions/61552/are-there-legitimate-uses-for-javascripts-with-statement

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