一个js在编辑器上的报错

Question

function Background(url, size){     b.style.background = url=='w' ? '#888786 url(/images/123/123.jpg) no-repeat' : '#888786 url(/images/qwe/qwe.png) no-repeat 50% -20%';     b.style.backgroundSize = size;     return true; }        Primitive value returned from constructor will be lost when called with    'new' 更少...    (Ctrl+F1)Checks that function recognized as constructor does not return primitive      values. When called with new , this value will be lost and object      will be returned instead. To avoid warnings, you can explicitly specify      function's return type with @return tag     从构造函数返回原始值将丢失时，称为'新'更少…（Ctrl + f1） 检查作为构造函数确认的函数不返回原始值。当调用新的，这个值将丢失，对象将返回。为了避免警告，您可以显式地指定函数返回类型英文翻译我看不懂。。。