赋值表达式的标准格式是什么？

Question

我在JavaScript中有以下函数,当它通过JSLint运行时,它对我大吼大叫,就像我所说的那样.

function getPos(event, element) {
    var x = event.clientX,
        y = event.clientY,
        currentElement = element;

    do {
        x -= currentElement.offsetLeft - currentElement.scrollLeft;
        y -= currentElement.offsetTop - currentElement.scrollTop;
    } while ((currentElement = currentElement.offsetParent));

    return {
        x: x,
        y: y
    };
}

Specifically about the inline assignment expression in the while loop. I figured the double parentheses was the standard way of saying, "I'm expecting the returned value from the assignment expression to be type-casted to a Boolean for the conditional." JSLint seems to disagree, even when I enable "assignment expressions." Then I tried adding a !! in front, and JSLint complains that it's "confusing usage." So my question is, what's the right way of formatting this?

编辑:通过"this",我的意思是内联赋值表达式.我的问题的目的是澄清该特定线路的可接受标准是什么,如果一个人真的想要使用它,虽然我确实认为thefourtheye的答案是最正确的编写函数的方法,但它不是答案我问的问题.

Answer 1

根据这篇文章，对于 JSHint、ESHint 和 JSLint（2013 年 7 月之前），您可以将其强制转换为如下条件：

do {
  // ...
} while ((currentElement = currentElement.offsetParent) !== null);

对于 JSLint 的最新版本，您运气不好，如果您看重全绿色，则需要将您的作业分开。