JavaScript-What are the reasons for introducing JS files but not showing them?

The introduction of the city selection of JS file, the morning can be opened to show, the afternoon will not be able to, the code has not changed.

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The introduction of the city selection of JS file, the morning can be opened to show, the afternoon will not be able to, the code has not changed.

Look at the console. There is no exception. See if JS has been introduced without

See if the data returned has changed.

The introduction of external files, the most need to pay attention to is the path, since can not be displayed, it must be the path is a problem, and then you say you have not modified. I read your tag, there is PHP, want to come to the landlord's path should be back to the background (PHP framework output template control). So, ask me what the phper is doing next to you.

Before I encountered a situation where Ajax gets over the HTML events that cannot be performed, the workaround uses $ ("body"). The on () method resolves the

1. See if the console has any errors, such as citing errors

2. Data problems, data interface error, or incorrect data returned by the interface.

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