Jquery Access Input Hidden Value Change On Hidden Input Field In Jquery

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You can access hidden fields" values with val(), just lượt thích you can vị on any other input element:

alert($("input#foo").val());alert($("input").val());alert($("input").val());alert($(":hidden#foo").val());alert($("input:hidden").val());Those all mean the same thing in this example.

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The most efficient way is by ID.

$("#foo").val(); //by idYou can read more here:

https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Writing_efficient_CSS

https://developers.google.com/speed/docs/best-practices/rendering?hl=it#UseEfficientCSSSelectors

There"s a jQuery selector for that:

// Get all form fields that are hiddenvar hidden_fields = $( this ).find( "input:hidden" );// Filter those which have a specific typehidden_fields.attr( "text" );Will give you all hidden input đầu vào fields và filter by those with a specific type="".

To get value, use:

$.each($("input"),function(i,val) if($(this).attr("type")=="hidden") var valueOfHidFiled=$(this).val(); alert(valueOfHidFiled); );or:

var valueOfHidFiled=$("input").val();alert(valueOfHidFiled);To set value, use:

$("input").attr("value",newValue);

If you want lớn select an individual hidden field, you can select it through the different selectors of jQuery :

$("#hiddenField").val(); //by id$("").val(); // by name$(".hiddenField").val(); // by class
If you have an asp.net HiddenField you need to:

To access HiddenField Value:

$("#").val() // HF = your hiddenfield IDTo set HiddenFieldValue

$("#").val("some value") // HF = your hiddenfield ID
Watch out if you want to lớn retrieve a boolean value from a hidden field!

For example:

(An input lượt thích this will be rendered by ASP MVC if you use
Html.HiddenFor(m => m.SomeBoolean).)

Then the following will return a string "False", not a JS boolean!

var notABool = $("#SomeBoolean").val();If you want to lớn use the boolean for some logic, use the following instead:

var aBool = $("#SomeBoolean").val() === "True";if (aBool) /* ...*/
Most universal way is lớn take value by name. It doesn"t matter if its đầu vào or select khung element type.

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var value = $("");
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