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Learn Jquery val Method

Содержание
  1. Jquery html with input value
  2. version added: 1.0 .val()
  3. version added: 1.0 .val( value )
  4. version added: 1.4 .val( function(index, value) )
  5. Примеры
  6. Примеры
  7. Шпаргалка jQuery:
  8. ТОП-10 Хостеров:
  9. Шпаргалки:
  10. Получать новые уроки на E-mail:
  11. RSS подписка
  12. Авторизация
  13. Рекомендуем
  14. Jquery html with input value
  15. Contents:
  16. .val() Returns: String or Number or Array
  17. version added: 1.0 .val()
  18. Examples:
  19. Demo:
  20. Demo:
  21. .val( value ) Returns: jQuery
  22. version added: 1.0 .val( value )
  23. version added: 1.4 .val( function )
  24. Examples:
  25. jQuery Get and Set Input Value By Name, Id
  26. How to Get and Set Input Value By Name, Id in jQuery
  27. Syntax jQuery val() Method
  28. Parameters of jQuery val() Method
  29. Example1 – jQuery Set Input Value By Id
  30. Output
  31. Example1 – jQuery Get Input Value By Id
  32. Output

Jquery html with input value

Возвращает или устанавливает значение атрибута value

version added: 1.0 .val()

version added: 1.0 .val( value )

version added: 1.4 .val( function(index, value) )

Метод используется для получения значений элементов формы таких как input, select, textarea. Метод возвращает строку, в случае массив

Для элементов select и чекбоксов, мы можем так же использовать :selected и :checked:

$('select.foo option:selected').val(); // достаём значение из элемента select $('select.foo').val(); // альтернативный способ $('input:checkbox:checked').val(); // достаём значение из чекбокса $('input:radio[name=bar]:checked').val(); // достаём значение из группы радио кнопок

Примеры

Пример: достать значение из элемента select и массив значений из множественного селектов.

    p < color:red; margin:4px; >b

Пример: получить значение поля input.

    p

Так же мы можем задавать значения.

Примеры

Пример: задаём значение полю input.

    button < margin:4px; cursor:pointer; >input

Пример: используем функция в качестве аргумента для установки значения input.

     
Type something and then click or tab out of the input.

Пример: задаём значение селекту из одного значения, и множественному селекту, а так же чекбоксам и группе радио кнопок.

    body      
 check1 check2 radio1 radio2

Шпаргалка jQuery:

  • Ajax
    • Global Ajax Event Handlers
      • .ajaxComplete()
        • :button
        • :checkbox
        • :checked
        • :disabled
        • :enabled
        • :file
        • :focus
        • :image
        • .serializeArray()
        • .serialize()
        • jQuery.param()
        • jQuery.ajax()
        • jQuery.ajaxSetup()
        • jQuery.ajaxPrefilter()
        • jQuery.ajaxTransport()
        • jQuery.get()
        • jQuery.post()
        • .load()
        • jQuery.getJSON()
        • jQuery.getScript()
        • .serialize()
        • .serializeArray()
        • jQuery.param()
        • .val()
        • .blur()
        • .change()
        • .focus()
        • .addClass()
        • .hasClass()
        • .removeClass()
        • .toggleClass()
        • .html()
        • .removeAttr()
        • .prop()
        • .removeProp()
        • .attr()
        • .val()
        • Collection Manipulation
          • jQuery.param()
          • .data()
          • .removeData()
          • Class Attribute
            • .addClass()
            • .hasClass()
            • .removeClass()
            • .toggleClass()
            • .clone()
            • .wrap()
            • .wrapAll()
            • .wrapInner()
            • .unwrap()
            • .append()
            • .appendTo()
            • .html()
            • .text()
            • .prepend()
            • .prependTo()
            • .after()
            • .before()
            • .insertAfter()
            • .insertBefore()
            • .unwrap()
            • .remove()
            • .empty()
            • .detach()
            • .replaceAll()
            • .replaceWith()
            • .removeProp()
            • .removeAttr()
            • .prop()
            • .attr()
            • .val()
            • .css()
            • .height()
            • .width()
            • .innerHeight()
            • .innerWidth()
            • .outerHeight()
            • .outerWidth()
            • .offset()
            • .position()
            • .scrollLeft()
            • .scrollTop()
            • .height()
            • .width()
            • .innerHeight()
            • .innerWidth()
            • .outerHeight()
            • .outerWidth()
            • jQuery.holdReady()
            • jQuery()
            • jQuery.noConflict()
            • jQuery.when()
            • .addClass()
            • .hasClass()
            • .removeClass()
            • .toggleClass()
            • .css()
            • .height()
            • .width()
            • .innerHeight()
            • .innerWidth()
            • .outerHeight()
            • .outerWidth()
            • .offset()
            • .position()
            • .scrollLeft()
            • .scrollTop()
            • .clearQueue()
            • .dequeue()
            • .data()
            • jQuery.hasData()
            • jQuery.removeData()
            • jQuery.dequeue()
            • .removeData()
            • jQuery.data()
            • .queue()
            • Custom
              • .clearQueue()
              • .dequeue()
              • .queue()
              • .clearQueue()
              • .dequeue()
              • jQuery.dequeue()
              • jQuery.data()
              • .queue()
              • jQuery.proxy()
              • callbacks.add()
              • callbacks.disable()
              • callbacks.disabled()
              • callbacks.empty()
              • callbacks.fire()
              • callbacks.fired()
              • callbacks.fireWith()
              • callbacks.has()
              • callbacks.lock()
              • callbacks.locked()
              • callbacks.remove()
              • jQuery.Callbacks()
              • deferred.always()
              • deferred.done()
              • deferred.fail()
              • deferred.notify()
              • deferred.notifyWith()
              • deferred.progress()
              • deferred.promise()
              • deferred.reject()
              • deferred.rejectWith()
              • deferred.resolve()
              • deferred.resolveWith()
              • deferred.state()
              • deferred.then()
              • Basics
                • Универсальный селектор (“*”)
                • jQuery( «.class» )
                • Селектор элементов (“element”)
                • Селектор ID (“#id”)
                • Множественный (“selector1, selector2, selectorN”)
                • Селектор по префиксу [name|=”value”]
                • Селектор содержащий значение [name*=»value»]
                • Селектор, содержащий слово [name~=»value»]
                • Селектор по атрибуту, на конце которого [name$=»value»]
                • Селектор по равенству [name=»value»]
                • Селектор по неравенству [name!=»value»]
                • Значение атрибута начинается с [name^=»value»]
                • Селектор по наличию атрибута [name]
                • Множественный селектор по атрибуту [name=»value»][name2=»value2″]
                • :animated Selector
                • :eq()
                • :even
                • :first
                • :focus
                • :gt()
                • :header
                • :lang()
                • :last
                • :lt()
                • :first-child
                • :first-of-type
                • :last-child
                • :last-of-type
                • :nth-child()
                • :nth-last-child()
                • :nth-last-of-type()
                • :nth-of-type()
                • :only-child
                • :only-of-type
                • :contains()
                • :empty
                • :has()
                • :parent
                • Browser Events
                  • .resize()
                  • .scroll()
                  • .ready()
                  • .bind()
                  • .delegate()
                  • jQuery.proxy()
                  • .off()
                  • .one()
                  • .trigger()
                  • .triggerHandler()
                  • .unbind()
                  • .undelegate()
                  • event.currentTarget
                  • event.data
                  • event.delegateTarget
                  • event.isDefaultPrevented()
                  • event.isImmediatePropagationStopped()
                  • event.isPropagationStopped()
                  • event.metaKey
                  • event.namespace
                  • event.pageX
                  • event.pageY
                  • event.preventDefault()
                  • event.relatedTarget
                  • event.result
                  • event.stopImmediatePropagation()
                  • event.stopPropagation()
                  • event.target
                  • event.timeStamp
                  • event.type
                  • event.which
                  • .blur()
                  • .change()
                  • .focus()
                  • .focusin()

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                  Шпаргалки:

                  Получать новые уроки на E-mail:

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                  Рекомендуем

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                  Источник

                  Jquery html with input value

                  Get the current value of the first element in the set of matched elements or set the value of every matched element.

                  Contents:

                  .val() Returns: String or Number or Array

                  Description: Get the current value of the first element in the set of matched elements.

                  version added: 1.0 .val()

                  The .val() method is primarily used to get the values of form elements such as input , select and textarea . When called on an empty collection, it returns undefined .

                  When the first element in the collection is a select-multiple (i.e., a select element with the multiple attribute set), .val() returns an array containing the value of each selected option. As of jQuery 3.0, if no options are selected, it returns an empty array; prior to jQuery 3.0, it returns null .

                  For selects, checkboxes and radio buttons, you can use :checked to select the right elements. For example:

                  // Get the value from the selected option in a dropdown
                  $( "select#foo option:checked" ).val();
                   
                  // Get the value from a dropdown select directly
                  $( "select#foo" ).val();
                   
                  // Get the value from a checked checkbox
                  $( "input[type=checkbox][name=bar]:checked" ).val();
                   
                  // Get the value from a set of radio buttons
                  $( "input[type=radio][name=baz]:checked" ).val();

                  Note: At present, using .val() on elements strips carriage return characters from the browser-reported value. When this value is sent to the server via XHR, however, carriage returns are preserved (or added by browsers which do not include them in the raw value). A workaround for this issue can be achieved using a valHook as follows:

                  $.valHooks.textarea = 
                   get: function( elem ) 
                   return elem.value.replace( /\r?\n/g, "\r\n" );
                   >
                  >;

                  Examples:

                  Get the single value from a single select and an array of values from a multiple select and display their values.

                  html>
                  html lang="en">
                  head>
                   meta charset="utf-8">
                   title>val demo title>
                   style> 
                   p 
                   color: red;
                   margin: 4px;
                   >
                   b 
                   color: blue;
                   >
                   style>
                   script src="https://code.jquery.com/jquery-3.7.0.js"> script>
                   head>
                  body>
                   
                  p> p>
                   
                  select id="single">
                   option>Single option>
                   option>Single2 option>
                   select>
                   
                  select id="multiple" multiple="multiple">
                   option selected="selected">Multiple option>
                   option>Multiple2 option>
                   option selected="selected">Multiple3 option>
                   select>
                   
                  script> 
                  function displayVals( ) 
                   var singleValues = $( "#single" ).val();
                   var multipleValues = $( "#multiple" ).val() || [];
                   // When using jQuery 3:
                   // var multipleValues = $( "#multiple" ).val();
                   $( "p" ).html( "Single: " + singleValues +
                   " Multiple: " + multipleValues.join( ", " ) );
                  >
                   
                  $( "select" ).on( "change", displayVals );
                  displayVals();
                   script>
                   
                   body>
                   html>

                  Demo:

                  Find the value of an input box.

                  html>
                  html lang="en">
                  head>
                   meta charset="utf-8">
                   title>val demo title>
                   style> 
                   p 
                   color: blue;
                   margin: 8px;
                   >
                   style>
                   script src="https://code.jquery.com/jquery-3.7.0.js"> script>
                   head>
                  body>
                   
                  input type="text" value="some text">
                  p> p>
                   
                  script> 
                  $( "input" )
                   .on( "keyup", function( ) 
                   var value = $( this ).val();
                   $( "p" ).text( value );
                   > )
                   .trigger( "keyup" );
                   script>
                   
                   body>
                   html>

                  Demo:

                  .val( value ) Returns: jQuery

                  Description: Set the value of each element in the set of matched elements.

                  version added: 1.0 .val( value )

                  A string of text, a number, or an array of strings corresponding to the value of each matched element to set as selected/checked.

                  version added: 1.4 .val( function )

                  A function returning the value to set. this is the current element. Receives the index position of the element in the set and the old value as arguments.

                  This method is typically used to set the values of form fields.

                  val() allows you to pass an array of element values. This is useful when working on a jQuery object containing elements like , , and s inside of a . In this case, the input s and the option s having a value that matches one of the elements of the array will be checked or selected while those having a value that doesn't match one of the elements of the array will be unchecked or unselected, depending on the type. In the case of s that are part of a radio group and s, any previously selected element will be deselected.

                  Setting values using this method (or using the native value property) does not cause the dispatch of the change event. For this reason, the relevant event handlers will not be executed. If you want to execute them, you should call .trigger( "change" ) after setting the value.

                  The .val() method allows setting the value by passing in a function. As of jQuery 1.4, the function is passed two arguments, the current element's index and its current value:

                  $( "input[type=text].tags" ).val(function( index, value ) 
                   return value.trim();
                  >);

                  This example removes leading and trailing whitespace from the values of text inputs with a "tags" class.

                  Examples:

                  Set the value of an input box.

                  Источник

                  jQuery Get and Set Input Value By Name, Id

                  jQuery set and get input box value; In this tutorial, you will learn how to set & get input box value by id, name and class using jQuery val () method.

                  This tutorial will take some examples using the val () method such as you can get selected box value using on jquery change. After get the value of selected box you can easily set the value of any input of text box using jquery val().

                  How to Get and Set Input Value By Name, Id in jQuery

                  • The jQuery val() method is used to get the value of the first element in the set of matching elements.
                  • This is also used to set the value of each matching element.

                  Syntax jQuery val() Method

                  $(selector).val(function (index, currentcontent))

                  This can use to set value using function.

                  Parameters of jQuery val() Method

                  Example1 – jQuery Set Input Value By Id

                  This val() method is work for to set a string of text, a number, an array of strings corresponding to the value of each matched element. It method lets you set the value by passing in the val() function.

                  Output

                  Learn Jquery value Method

                  Click here to change the content

                  Example1 – jQuery Get Input Value By Id

                  The val () method is mainly used to obtain the values ​​of form elements. In the below example, When we select a give select value then get the value of selected box and put the value of input box

                  Output

                  Learn Jquery value Method

                  Источник

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