javascript JSHint 沉默“变量已定义但从未使用”
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原文地址: http://stackoverflow.com/questions/22037197/
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JSHint silence "Variable is defined but never used"
提问by Amal Antony
I want to silence the JSHint warning "attrs is defined but never used"for the variable attrs. However I do not want to use the option /* jshint unused:false */since this will turn off the warning altogether. I want the warning to be disabled only for attrs.
我想消除变量的 JSHint 警告“已定义属性但从未使用过”attrs。但是我不想使用该选项，/* jshint unused:false */因为这将完全关闭警告。我希望仅针对attrs.
回答by Josh Harrison
For global variables
对于全局变量
Add
添加
/* exported variableNameHere */
at the top of your script. In your case, replace variableNameHerewith attrs. This tells jshint that attrswill be used elsewhere.
在脚本的顶部。在您的情况下，替换variableNameHere为attrs. 这告诉 jshintattrs将在其他地方使用。
For multiple variables:
对于多个变量：
/* exported attrs, somethingElse, somethingElse2 */
For local variables
对于局部变量
You can ignore allunused local variables within a given function scope using the method outlined in this jshint commitand this GitHub issue. Example:
您可以使用此 jshint 提交和此GitHub 问题中概述的方法忽略给定函数范围内所有未使用的局部变量。例子：
//jshint unused:true
var a;
function foo(b) {
//jshint unused:false
return 1;
}
foo();
// ->
// Line 1: 'a' is defined but never used.
This doesn't seem to be documented anywhere else, but works when tested on http://jshint.com/
这似乎没有在其他任何地方记录，但在http://jshint.com/ 上测试时有效
