jquery gets checkbox checked

In the process of using jquery, a more specific attribute is found, that is, whether the checkbox of the input tag is selected

after jquery 1.6 + , the check state of the checkbox is not obtained directly from $ (XXX). attr ("checked"), but prop (NAME|PROPERTIES|KEY,VALUE|FN)

Specific examples:

if ($ (' input[name= ' Iscknotrans "]). Prop (" checked ") {alert (" checked ");} Else{alert ("Unchecked");}

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jquery gets checkbox checked