Jquery in $ (' obj '). attr (' checked ', true) several solutions for failure

1, $ (' obj '). Prop (' checked ', true)

2.

$ (': CheckBox '). each (function () {

This.checked=true;

})

Why: attr for expiration? Because checked belongs to the properties of the prototype object. The attr error occurs when the Remove prototype object. The prototype object refers to the self-brought, unable to be removed. Prop will ignore this error. The attr operation is a generic non-prototype object (removable). The DOM object properties of JS can be added arbitrarily.

Jquery in $ (' obj '). attr (' checked ', true) several solutions for failure