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How does js overwrite the original method and overwrite the original method?
<Html>Objective: To improve the calling method.
If you have made an editor that provides some cursor exit events, you 'd better use this method, because when someone else uses your editor, you may need to use the event method provided by the editor to handle some things. Some of the events must be rewritten according to special requirements, it is necessary to provide event methods that are allowed to override the editor!
How can I use the js rewrite Method in actual projects? For example, I want to rewrite the js Rounding Method toFixed.This toFixed function is a js native function and does not need to be added.
However, if you need to expand some native object functions, you can write them in a js file, and then introduce this js file to every page that needs to use it.
For example, you need to extend the Date object by adding format Date. prototype. format = function (strFormat ){}
Write this file in a separate js file, and then introduce this js file into every page.
<Script type = "text/javascript" src = "/js/date. format. js"> </script>
Will java method rewriting overwrite the original method?No. If you use a subclass object to call, you call the overwritten method. If you use a parent class object to call the method, the method before rewriting is called, that is, the method that is not overwritten.
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