jQuery - Chaining

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jQuery - Chaining


With jQuery, you can chain together actions/methods.
Chaining allows us to run multiple jQuery methods (on the same
element) within a single statement.

jQuery Method Chaining
Until now we have been writing jQuery statements one at a time (one after the
other).
However, there is a technique called chaining, that
allows us to run multiple jQuery commands, one after the other, on the same
element(s).
Tip: This way, browsers do not have to find the same element(s) more than once.
To chain
an action, you simply append the action to the previous action.
The following example chains together the css(), slideUp(), and slideDown()
methods. The "p1" element first changes to red, then it slides up, and then it
slides down:

Example

$("#p1").css("color", "red").slideUp(2000).slideDown(2000);
Try it Yourself »

We could also have added more method calls if needed.
Tip: When chaining, the line of code
could become quite long. However, jQuery is not very strict on the syntax; you can format it like you want, including line breaks and indentations.
This also works just fine:

Example

$("#p1").css("color", "red")
  .slideUp(2000)
  .slideDown(2000);
Try it Yourself »

jQuery throws away extra whitespace and executes the lines above as one long line of code.












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Reference: https://www.w3schools.com/jquery/jquery_chaining.asp

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