Design a program in js so that it can print its own method collection_javascript skills

Design a program in js so that it can print itself

[Ctrl A Select all Note: If you need to introduce external Js, you need to refresh to execute

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It feels good

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Suddenly this question seems like There is nothing to discuss:

If you want to print all the code, add at the end of the program:
alert(document.getElementsByTagName("script")[0].outerHTML)

If you remove <script></script>
alert(document.getElementsByTagName("script")[0].innerHTML);

If you only print the code of a certain function: alert(arguments.callee) //Unnamed functionalert(function name)　　 //Named function<title></title> New Document

<script>(function(){alert("<script>"+arguments.callee+"()<\/script>")})()</script> <script> function a() { document.write(a, "a()");}a() </script>[Ctrl A select all Note: <script>(function a(){alert("<script>"+a+"()<\/script>")})()</script>If you need to introduce external Js, you need to refresh to execute <script> function AnyCode() { // Any Code } var anyCode = 0; alert(document.getElementsByTagName("script")[0].outerHTML) </script>]