如何修复jslint'&&'子表达式应该包含在parens错误中 [英] how to fix jslint The '&&' subexpression should be wrapped in parens error

问题描述

我把所有内容放在括号中但是下面的代码仍然在jslint中抛出错误：

I put everything in parentheses but code below still throws error in jslint:

Problem at line 5 character 104: The '&&' subexpression should be wrapped in parens.

if ((typeof (c1) === 'string') && (typeof (c2) === 'string') && (c1 !== n...

如何修复？

"use strict";

function t() {
    var c1, c2;
    if (((typeof (c1)) === 'string') && ((typeof (c2)) === 'string') && (c1 !== null) && (c2 !== null) && ((c1.trim()) === '') || ((c2.trim()) !== '')) {
        return;
    }
}

推荐答案

它抱怨表单 if（a && b&& c || d）因为（我想），&& 或<是不是很明显code> || 将优先。修复它看起来像 if（a&& b&&（c || d）），它将停止抱怨。

It's complaining about the form if(a && b && c || d) because (I suppose) it's not immediately obvious whether && or || will take precedence. Fix it to look like if(a && b && (c || d)) and it will stop complaining.

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