Change label text for multiple inputs - javascript

I have a dynamic page that can have a lot of input[type="file"] fields. I need to change the label of every input once a file is selected.
So, for each input, if:
Empty: text = "upload";
File selected: text = name of file.
Here is a sample of HTML:
<label for="upload-qm1">
<span class="button">upload</span>
<input id="upload-qm1" type="file" accept=".pdf, .doc">
</label>
I know how to do this for a single input, using this code:
$('label[for="upload-qm1"] span').text($(this).val());
However, I don't know how many input fields I will have on my page. I tried something like this:
$(this).parent('label').find('span').text($(this).val());
but unfortunately it doesn't work. Any help on how I can get a method for changing all input fields?

You can use DOM traversal to find the span related to the input which was changed. Try this:
$('input:file').change(function() {
$(this).prev('span').text($(this).val());
})
Working example

The most of the code you tried ist corret.
The problem is that you have set a parameter for the parent() function.
Try something like this:
$(this).parent('label').find('span').text($(this).val());
Also make sure that $(this) is the input field not the label itself,
if you click on the label $(this) is the label.

$('input[type="file"]').on('change', function() {
id = $(this).attr('id');
console.log("change event")
var file = $('#'+id).val().split('\\').pop();
if(file!='') {
$('label[for="'+id+'"] span').text(file)
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<label for="upload-qm1">
<span class="button">upload</span>
<input id="upload-qm1" type="file" accept=".pdf, .doc">
</label>

Related

Using AngularJS to style label when ng-model changes in a text field

A few days back, I asked the following question:
I've searched for how to do this, and I've not had any luck. I'm fairly inexperienced with web stuff, so perhaps it's so trivial that no one needs to ask how to do it :(
Suppose I have an HTML text input field with a label, like this:
<label for = "stuff">Stuff</label>
<input type = "text" name = "stuffz" id="stuff" value = "hello!">
Now suppose the text input field value is changed. Is there a way to use AngularJS to restyle the label (Like, turn it green, for example) when this change occurs? I've looked into using ng-change and ng-class, but I'm not knowledgeable enough about how these work to use them in this manner.
When I tested the solution provided, which was:
CSS
.marvellous {
color: green;
}
HTML
<div ng-app="demo">
<label for="stuff" ng-class="{ 'marvellous' : !!hasChanged }">Stuff</label>
<input type="text" id="stuff" ng-model="myModel" ng-change="hasChanged = true"></div>
It worked, but only when I manually changed the text field (i.e. I typed stuff in the text field directly). However, in the particular application I'm working on, I need for the labels to be restyled when the value stored in ng-model changes. Unfortunately, I falsely assumed that if this method worked when I manually changed the text field, it must work if ng-model were to change as well. I've come to find out that it doesn't.
What's the reason for this? And how can I make the label re-style when ng-model changes?
Thanks!
EDIT: When I say "ng-model changes," what I mean is..in my controller, there is a variable that is used to populate the text fields of the app that I'm working on. However, when the user clicks an "import changes" button, this variable is changed according to the changes that they are importing, which consequently changes the corresponding text fields linked to that variable. Ultimately, I want all of the labels attached to these changed text fields to be highlighted for the user to see. I'm sorry for my vagueness.
Each input in an angular js form has meta data properties to help you. For example
<form id="form">
<label for="stuff" ng-class="{ 'marvellous' : form.stuff.$dirty}">Stuff</label>
<input type="text" id="stuff" ng-model="myModel" ng-change="hasChanged = true">
</form>
https://docs.angularjs.org/api/ng/type/form.FormController
You can achieve that using $scope.$watch :
function demoCtrl ($scope) {
$scope.$watch('myModel', function (newValue, oldValue) {
if (newValue) {
$scope.hasChanged = true;
}
});
$scope.changeMyModel = function () {
$scope.myModel = 'wonderful';
};
}
.marvellous {
color: green;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app ng-controller="demoCtrl">
<label for="stuff" ng-class="{ 'marvellous' : !!hasChanged }">Stuff</label>
<input type="text" id="stuff" ng-model="myModel" ng-change="hasChanged = true">
<button ng-click="changeMyModel()">change model</button>
</div>
<!--Use ng-style !!! replace your lable with this--->
<label for="stuff" ng-style="hasChanged()">Stuff</label>
and define your function like this below---
$scope.hasChanged = function(){
if($scope.myModel !== initValue){
return { color: "green" }
}
}

clear value in an input field with jQuery

Hi I have a number of inputs for telephone numbers, they use the same class and the same show/hide techinque.
I want to be able to clear the contents of the phone number in the input box, i.e. with the class name of input_tel.
However it seems to clear all inputs which I assume is because I am using the following line; input:text , when I put in a class it just fails to work.
My JS and some of my html is below or view a jsFiddle:
$(".contact_numbers").on('click', '.clearnumber', function () {
$(this).siblings('input:text').val('');
});
<div class="telephonetwo contact_numbers">
<input type="text" class="smallinput contactpagelabel" name="faxname" size="10" value="Fax">
<input type="checkbox" class="contact_no" name="showfax" value="Y">
<input type="text" name="fax" size="30" value="016128 13456" class="input_tel">
Hide Clear #
</div>
If you are viewing my JSfiddle click the reveal additional numbers for the clear button to appear.
Update
I want to be able to clear the closest input_tel rather than all of them, as their are multiple numbers.
Thanks in advance
replace:
$(this).siblings('input:text').val('');
with
$(this).siblings('input:text').closest('.input_tel').val('');
JSFIDDLE DEMO
How about targeting the input_tel class then?
$(".contact_numbers").on('click', '.clearnumber', function () {
$(this).parent().parent().find('input.input_tel').val('');
});
Assuming no other input fields have that input_tel class on them.
This should do it...
$(".contact_numbers").on('click', function () {
$(".input_tel").val('');
});
The safe way to clear input fields with jquery
$.fn.noText = function() {/*use the jquery prototype technology to make a chainable clear field method*/
if(this.is('input')){ /*check to c if you the element type is an input*/
this.val('');/*clear the input field*/
}return this;/*means it is chainable*/
};
$('input').noText();

How to erase the text input that the user typed using JavaScript

<div class = "search ui-widget">
<label for = "keyword"></label>
<input type="text" id="keyword" onkeypress="searchKeyPress(event)" placeholder="Search here" required>
<input type="button" id="btnSearch" onclick="loadDeals('search', keyword.value,'')" />
</div>
$('.search input#keyword').Value('');
Basically what I want is to remove the user's input in the text box after the user clicks another menu tab. I tried $('.search input#keyword').Value(''); and $('.search input#keyword').css("value", ''); but it didn't work.
.val() is the right name of the jQUery method, not Value().
You can use jQuery like this:
$('#keyword').val('');
Or you can use plain javascript like this:
document.getElementById('keyword').value = '';
If there are more input fields beside the ones you posted and you want to clear all inputs you can use:
$('.search input').val('');
Here's a pure javascript solution:
document.getElementById('keyword').value = '';
Since HTML id attributes are supposed to be unique I would recommend not using the '#keyword' id in your jquery selector. The solution does work if there's only one text field, but it isn't scalable to multiple text fields. Instead, I would make 'keyword' a class for the input element and use the selector:
$('.search input.keyword').val('');
This is very similar to the solution Sergio gave except it allows you to control, via the 'keyword' class, which input elements have their values cleared.
Use this
$("the_class_or_id").val("");
Link for this: jQuery Documentation
This is introduced in jQuery API. You can use .value in JavaScript, but in jQuery its val(). It gets the value of the object and to clear the value, just add quotes!
JavaScript code would be:
document.getElementById("id_name").value = "";

Populate form field with javascript

I have a form with several fields populated by the user and before it is submitted some javascript gets called when a check button. It tries to set the value of the form fields to a variable that exists in the js function.
document.getElementById('var1').innerHTML = test;
alert(test);
I know the javascript is working as expected because I see the alert but the form boxes are not getting populated:
#helper.input(testForm("var1")) { (id,name,value,args) => <input type="text" name="#name" id="#id" #toHtmlArgs(args)> }
innerHTML is used to get/set the body of an html tag, so you're probably ending up with this in the html:
<input ...>test</input>
I think this may work for a <textarea>, but for your <input type="text"> you want to set the value attribute.
document.getElementById('var1').value = test;
If you want to programmatically set an html form field via JS there are many ways to do this and many libraries out there that make it really easy.
Such as various JS two-way component template binding libraries.
For instance, you can simply do the following:
HTML:
<div id="myapp">
<input id="var1"/>
<button>Submit</button>
</div>
JS:
mag.module('myapp',{
view : function(state){
var test= 'tester';
state.button= {
_onclick:function(){
state.var1=test
}
}
}
});
Here is working example of the above example:
http://jsbin.com/ciregogaso/edit?html,js,output
Hope that helps!

linking HTML checkbox with element to hide when checkbox is unchecked

What's a good pattern for adding additional data to an HTML element? For example, I'd like to link a checkbox to HTML I'd like to hide when the checkbox is unchecked. Like the for attribute of a label element, I want to specify the linkage in markup so I can write a simple, generic script to iterate through all checkboxes and hook up a jquery event handler to do the hiding/showing.
For example, in this HTML:
<input type="checkbox" id="showFoo" />
<div id="foo">
Some HTML here. Hide this when the checkbox is unchecked.
</div>
What's a good to let my script know that #showFoo is related to #foo? Ideally something that doesn't make my HTML non-validating or and doesn't require me to use a specific naming convention for IDs. Extra credit if it makes my script more efficient.
use a data-[key] attribute to identify what #showFoo should control
example jsfiddle
HTML:
<input type="checkbox" id="showFoo" data-toggles="foo" />
<div id="foo">
Some HTML here. Hide this when the checkbox is unchecked.
</div>
jQuery:
$('#showFoo').change(function() {
$('#' + $(this).data('toggles')).toggle();
});
This seems like a perfect case for data elements.
<input type="checkbox" id="showFoo" data-relateddiv="foo" />
Then in an event handler on the checkboxs:
$('#' + $(this).data("relateddiv")).show();
You can use the "rel" attribute
<input type="checkbox" id="showFoo" rel="foo" />
$('#showFoo').click(function(){
var element_id = $(this).attr('rel');
var element = $('#'+element_id);
if(element.is(':hidden')){
element.slideDown();
//element.show();
}
else{
element.slideUp();
//element.hide();
}
});
I use this currently
element.each(function(i, e) {
var checked = $(e).prop('checked'),
foo = */Relationship betweeen element and foo*/;
foo .toggleClass('invisibleClass', checked)
.toggleClass('visibleClass', !checked);
});
in case you have multiple foos and elements (you have to define the relationship between them first)
Run it on the event of your choice
Try below
if (checkboxIsChecked) {
foo.visibility:visible;
} else {
foo.visibility:hidden;
}

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