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jQuery 使用注意事项 与 小技巧（tips）

 

 

jQuery 使用注意事项 与 小技巧（tips）

 

 

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$( document ).ready()

https://learn.jquery.com/using-jquery-core/document-ready/

 

A page can't be manipulated safely until the document is "ready." jQuery detects this state of readiness for you. Code included inside $( document ).ready() will only run once the page Document Object Model (DOM) is ready for JavaScript code to execute. Code included inside $( window ).load(function() { ... }) will run once the entire page (images or iframes), not just the DOM, is ready.

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// A $( document ).ready() block.
$( document ).ready(function() {
console.log( "ready!" );
});

Experienced developers sometimes use the shorthand $() for $( document ).ready(). If you are writing code that people who aren't experienced with jQuery may see, it's best to use the long form.

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// Shorthand for $( document ).ready()
$(function() {
console.log( "ready!" );
});

You can also pass a named function to $( document ).ready() instead of passing an anonymous function.

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// Passing a named function instead of an anonymous function.
 
function readyFn( jQuery ) {
// Code to run when the document is ready.
}
 
$( document ).ready( readyFn );
// or:
$( window ).load( readyFn );

The example below shows $( document ).ready() and $( window ).load() in action. The code tries to load a website URL in an