Angularjs enabling disabled dropdowns in the ng-repeat - javascript

Hi in following html code I am using ng-repeat to display all the rows with name and the dropdowns.
<div ng-repeat="a in items">
<div>
<span>{{a.name}}</span>
</div>
<div>
<select ng-model="a.c_id" ng-options="d.c_id as d.description for d in loclist" ng-disabled="display" ng-change="selected(a.c_id)">
</select>
</div>
<button ng-click="submit(items)">Submit</button>
In my controller when value of c_id is 3 it disables the dropdown using following code
$scope.display = false;
$scope.selected = function (value) {
this.te = value;
if (this.te == 3) {
this.display = true;
}
};
Using submit button I want to first enable all the dropdowns that were disabled previously. Using the following code
$scope.submit=function(items)
{
for(i=0; i< items.length; i++)
{
this.display=false;
}
}
It doesnt work. It will not set display=false for the dropdown to be enable.
Please let me know how to correct this issue so I can reset the display to false.
Thanks

A simple solution is to bind ng-disabled with an item instead of the scope:
ng-disabled="a.display"
on ng-change, pass the item to the function:
ng-change="selected(a)"
Change your select function to update the display property on an item:
$scope.selected = function (item) {
var value = item.c_id;
this.te = value;
if (this.te == 3) {
item.display = true;
}
};
In your submit function, just loop through the items and reset the display:
$scope.submit=function(items)
{
for(i=0; i< items.length; i++)
{
items[i].display=false;
}
}

I think you have a typo here
ng-click="submit(items)"
Correct it as follows sbumit to submit
$scope.submit=function(items)
{
for(i=0; i< items.length; i++)
{
this.display=false;
}
}

Related

how to get all checkboxes from one of three forms?

I have three forms, each of them has checkboxes and submit button. I need to get all checkbox names or id by clicking on the submit button in only this form.
And for other two also.
function getCheckedBoxes(item) {
var checkboxes = document.getElementsByName(item);
var checkboxesChecked = [];
// loop over them all
for (var i=0; i<checkboxes.length; i++) {
// And stick the checked ones onto an array...
if (checkboxes[i].checked) {
checkboxesChecked.push(checkboxes[i]);
}
}
// Return the array if it is non-empty, or null
console.log(checkboxes);
return checkboxesChecked.length > 0 ? checkboxesChecked : null;
}
var inp = document.getElementsByName('send');
for(var i = 0; i < inp.length; i++){
inp[i].addEventListener('click', function(e) {
getCheckedBoxes("item");
e.preventDefault();
});
}
example of my checkboxes
<form>
<input id="check29" type="checkbox" name="item" value="29" />
<input class="lab-btn" type="submit" value="ADD ALL" name="send">
</form>
You can pass the form as a parameter to the function, then use querySelectorAll to get all of its inputs with the desired name.
So first, change the event handler to this:
inp[i].addEventListener('click', function(e) {
getCheckedBoxes(this.form, "item");
e.preventDefault();
});
Then the function itself to:
function getCheckedBoxes(oForm, item) {
var checkboxes = oForm.querySelectorAll('input[name="' + item + '"]');
//...
}
To select all checboxes on a page you can use:
var checkboxes = document.querySelectorAll("input[type=checkbox]");
// And for all checkboxes in a form:
var checkboxesInForm = form.querySelectorAll("input[type=checkbox]");
See https://developer.mozilla.org/nl/docs/Web/API/Document/querySelectorAll for documentation.
Does this answer your question?

AngularJS Add More Option For Input Type File

Suppose I want to add 'Add More' button next to input type file field.
So that on click of 'Add More' button one more file field will be created.
I could use '.clone()' for this in JQuery.
But how will I do this in AngularJS?
Thanks!!
In controller:
$scope.addMore = function() {
$scope.inputs += 1;
};
$scope.range = function(count) {
var inputs = [];
for (var i = 0; i < count; i++) {
inputs.push(i)
}
return inputs;
}
$scope.inputs = 0;
In HTML:
<input ng-repeat="n in range(inputs)">
<button ng-click="addMore()">Add more!</button>
MORE USEFUL VERSION:
Typically you want to have other information related to the input field though, so depending on your use case, you might just want to have an array of input objects with some properties, and then ng-repeat over that array like following:
Controller:
$scope.inputs = [];
$scope.addMore = function() {
$scope.inputs.push({
id: $scope.inputs.length,
text: "Initial text here"
})
};
HTML:
<input ng-repeat="input in inputs" ng-model="inputs[$index].text">
<button ng-click="addMore()">Add more!</button>
What you want to do is to create an array of input button.
display your input array :
<div ng-repeat="item in items"><input type="text" ng-model="item.value"><div>
attach a function to the ng-click of your button :
<button ng-click="addMore()">Add More</button>
and then define your array in controller :
$scope.items = [];
$scope.addMore = function () {
$scope.items.push({
value:'default'
});

How to put IF CONDITION with an AND CONDITION and the NOT OPERATOR in javascript?

<body>
<input type="radio" name="other_charges" value="To Pay" >To Pay
<input type="radio" name="other_charges" value="COD" >COD
<input type="submit" onclick="sum_cash()"/>
</body>
here is my html ...in this i am having two radio buttons with different values and i have called a function using onclick event....here is the code...
<script type="text/javascript">
function sum_cash() {
var elements_ocharges = document.getElementsByName('other_charges');
for (var i = 0; i < elements_ocharges.length; i++) {
if (elements_ocharges[i].checked)
value_ocharges = elements_ocharges[i].value;
}
var val_ocharges=value_ocharges;
if (val_ocharges=="To Pay") {
alert("pay");
}
if (val_ocharges=="COD") {
alert("cod");
}
if ((val_ocharges!="COD") && (val_ocharges!="To Pay") ) {
alert("hi");
}
}
</script>
Now in the function, I am checking the value of the radio button selected. If the user chooses the Pay radio button then on clicking the submit button it alerts the user for payment. When the user chooses the COD radio button then on submitting it alerts COD.
What I want is that when the user has selected nothing and clicked on the submit button then it should alert the user. Unfortunately, it is not checking the condition. Can anyone please help me?
You may try like this:
<script type="text/javascript">
function sum_cash()
{
var elements_ocharges = document.getElementsByName('other_charges');
var value_ocharges = null;
for (var i = 0; i < elements_ocharges.length; i++)
{
if (elements_ocharges[i].checked)
value_ocharges = elements_ocharges[i].value;
}
var val_ocharges=value_ocharges;
if(val_ocharges=="To Pay")
{
alert("pay");
}
else if(val_ocharges=="COD")
{
alert("cod");
}
else
{
alert("hi");
} }
</script>
your problem is this conditional near the top:
if (elements_ocharges[i].checked)
value_ocharges = elements_ocharges[i].value;
since neither radio button is checked, value_ocharges is never set. this will cause an error when you attempt to access the value with var val_ocharges=value_ocharges; you should set the value of value_ocharges to something (null is fine) before entering your loop, then everything will work:
<script type="text/javascript">
function sum_cash()
{
var elements_ocharges = document.getElementsByName('other_charges');
var value_ocharges = null;
for (var i = 0; i < elements_ocharges.length; i++)
{
if (elements_ocharges[i].checked)
value_ocharges = elements_ocharges[i].value;
}
var val_ocharges=value_ocharges;
if(val_ocharges=="To Pay")
{
alert("pay");
}
if(val_ocharges=="COD")
{
alert("cod");
}
if ((val_ocharges!="COD") && (val_ocharges!="To Pay") )
{
alert("hi");
}
}
</script>
Try this ,
else if ((val_ocharges =="")
{
alert("hi");
}
Hope this helps!!
First, set your value_ocharges above the for loop:
var value_ocharges = false;
Then, instead of:
if ((val_ocharges!="COD") && (val_ocharges!="To Pay") ) {
alert("hi");
}
use this outside of the loop:
if (!val_ocharges){
alert("hi");
}
Basically, this checks if val_ocharges is defined somewhere in the loop, and if it's not, it triggers the alert.

Need a solution to this javascript coding problem

I have a SELECT in a FORM.
This select is populated using js.
I need to add a "Selected" attribute to one of these options.
I get which one, by checking a MySql database to see the name of the community which needs to have a "selected attribute" added to it.
<select name="community" id="community">
//OPTIONS HERE
</select>
The filler() function:
function filler(com){
//com is the options which needs to be selected, this variables value comes from the mysql database
var community = document.getElementById("community");
var area = document.getElementById("area").value;
// area is just another input on the page which value also is fetched from mysql db. Each area has x communities, so I have alot of IF:s.
if(area == 'Blekinge') {
community.length = 6;
community.options[0].value = "Välj Kommun";
community.options[0].text = "-- Välj Kommun --";
community.options[0].id = "Välj Kommun";
community.options[1].value = "Karlshamn";
community.options[1].text = "Karlshamn";
community.options[1].id = "Karlshamn";
community.options[2].value = "Karlskrona";
community.options[2].text = "Karlskrona";
community.options[2].id = "Karlskrona";
community.selected = 0;
}
}
As you can see, "com" variable is the option which needs to have the "selected" attribute added to it.
I have over 30 of these if-statements, and I have no clue how to create a function to add this "Selected" attribute to the matching option.
So I have "com" which for example could be "Karlskrona" in the example above. How should I add the selected to it?
I need a simple function for this which works in all major browsers...
Set the selectedIndex property of the SELECT to whichever index you need. Zero-based, of course.
Just do
community.value = com;
example at http://www.jsfiddle.net/jMapA/
for(var i = 0; i < community.options.length; i++) {
if(community.options[i].id == com)
community.selectedIndex = i;
}
function selectOptionValue(selectId, value)
{
select = document.getElementById(selectId);
if (select)
{
for (var i = 0; i < select.options.length)
{
if (select.options[i].value == value)
{
select.options[i].selected = 'selected';
return true;
}
}
}
return false;
}
Use my function like this:
selectOptionValue('community', 'Karlskrona');

Generic way to detect if html form is edited

I have a tabbed html form. Upon navigating from one tab to the other, the current tab's data is persisted (on the DB) even if there is no change to the data.
I would like to make the persistence call only if the form is edited. The form can contain any kind of control. Dirtying the form need not be by typing some text but choosing a date in a calendar control would also qualify.
One way to achieve this would be to display the form in read-only mode by default and have an 'Edit' button and if the user clicks the edit button then the call to DB is made (once again, irrespective of whether data is modified. This is a better improvement to what is currently existing).
I would like to know how to write a generic javascript function that would check if any of the controls value has been modified ?
In pure javascript, this would not be an easy task, but jQuery makes it very easy to do:
$("#myform :input").change(function() {
$("#myform").data("changed",true);
});
Then before saving, you can check if it was changed:
if ($("#myform").data("changed")) {
// submit the form
}
In the example above, the form has an id equal to "myform".
If you need this in many forms, you can easily turn it into a plugin:
$.fn.extend({
trackChanges: function() {
$(":input",this).change(function() {
$(this.form).data("changed", true);
});
}
,
isChanged: function() {
return this.data("changed");
}
});
Then you can simply say:
$("#myform").trackChanges();
and check if a form has changed:
if ($("#myform").isChanged()) {
// ...
}
I am not sure if I get your question right, but what about addEventListener? If you don't care too much about IE8 support this should be fine. The following code is working for me:
var form = document.getElementById("myForm");
form.addEventListener("input", function () {
console.log("Form has changed!");
});
In case JQuery is out of the question. A quick search on Google found Javascript implementations of MD5 and SHA1 hash algorithms. If you wanted, you could concatenate all form inputs and hash them, then store that value in memory. When the user is done. Concatenate all the values and hash again. Compare the 2 hashes. If they are the same, the user did not change any form fields. If they are different, something has been edited, and you need to call your persistence code.
Another way to achieve this is serialize the form:
$(function() {
var $form = $('form');
var initialState = $form.serialize();
$form.submit(function (e) {
if (initialState === $form.serialize()) {
console.log('Form is unchanged!');
} else {
console.log('Form has changed!');
}
e.preventDefault();
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form>
Field 1: <input type="text" name="field_1" value="My value 1"> <br>
Field 2: <input type="text" name="field_2" value="My value 2"> <br>
Check: <input type="checkbox" name="field_3" value="1"><br>
<input type="submit">
</form>
Form changes can easily be detected in native JavaScript without jQuery:
function initChangeDetection(form) {
Array.from(form).forEach(el => el.dataset.origValue = el.value);
}
function formHasChanges(form) {
return Array.from(form).some(el => 'origValue' in el.dataset && el.dataset.origValue !== el.value);
}
initChangeDetection() can safely be called multiple times throughout your page's lifecycle: See Test on JSBin
For older browsers that don't support newer arrow/array functions:
function initChangeDetection(form) {
for (var i=0; i<form.length; i++) {
var el = form[i];
el.dataset.origValue = el.value;
}
}
function formHasChanges(form) {
for (var i=0; i<form.length; i++) {
var el = form[i];
if ('origValue' in el.dataset && el.dataset.origValue !== el.value) {
return true;
}
}
return false;
}
Here's how I did it (without using jQuery).
In my case, I wanted one particular form element not to be counted, because it was the element that triggered the check and so will always have changed. The exceptional element is named 'reporting_period' and is hard-coded in the function 'hasFormChanged()'.
To test, make an element call the function "changeReportingPeriod()", which you'll probably want to name something else.
IMPORTANT: You must call setInitialValues() when the values have been set to their original values (typically at page load, but not in my case).
NOTE: I do not claim that this is an elegant solution, in fact I don't believe in elegant JavaScript solutions. My personal emphasis in JavaScript is on readability, not structural elegance (as if that were possible in JavaScript). I do not concern myself with file size at all when writing JavaScript because that's what gzip is for, and trying to write more compact JavaScript code invariably leads to intolerable problems with maintenance. I offer no apologies, express no remorse and refuse to debate it. It's JavaScript. Sorry, I had to make this clear in order to convince myself that I should bother posting. Be happy! :)
var initial_values = new Array();
// Gets all form elements from the entire document.
function getAllFormElements() {
// Return variable.
var all_form_elements = Array();
// The form.
var form_activity_report = document.getElementById('form_activity_report');
// Different types of form elements.
var inputs = form_activity_report.getElementsByTagName('input');
var textareas = form_activity_report.getElementsByTagName('textarea');
var selects = form_activity_report.getElementsByTagName('select');
// We do it this way because we want to return an Array, not a NodeList.
var i;
for (i = 0; i < inputs.length; i++) {
all_form_elements.push(inputs[i]);
}
for (i = 0; i < textareas.length; i++) {
all_form_elements.push(textareas[i]);
}
for (i = 0; i < selects.length; i++) {
all_form_elements.push(selects[i]);
}
return all_form_elements;
}
// Sets the initial values of every form element.
function setInitialFormValues() {
var inputs = getAllFormElements();
for (var i = 0; i < inputs.length; i++) {
initial_values.push(inputs[i].value);
}
}
function hasFormChanged() {
var has_changed = false;
var elements = getAllFormElements();
for (var i = 0; i < elements.length; i++) {
if (elements[i].id != 'reporting_period' && elements[i].value != initial_values[i]) {
has_changed = true;
break;
}
}
return has_changed;
}
function changeReportingPeriod() {
alert(hasFormChanged());
}
Here's a polyfill method demo in native JavaScript that uses the FormData() API to detect created, updated, and deleted form entries. You can check if anything was changed using HTMLFormElement#isChanged and get an object containing the differences from a reset form using HTMLFormElement#changes (assuming they're not masked by an input name):
Object.defineProperties(HTMLFormElement.prototype, {
isChanged: {
configurable: true,
get: function isChanged () {
'use strict'
var thisData = new FormData(this)
var that = this.cloneNode(true)
// avoid masking: https://developer.mozilla.org/en-US/docs/Web/API/HTMLFormElement/reset
HTMLFormElement.prototype.reset.call(that)
var thatData = new FormData(that)
const theseKeys = Array.from(thisData.keys())
const thoseKeys = Array.from(thatData.keys())
if (theseKeys.length !== thoseKeys.length) {
return true
}
const allKeys = new Set(theseKeys.concat(thoseKeys))
function unequal (value, index) {
return value !== this[index]
}
for (const key of theseKeys) {
const theseValues = thisData.getAll(key)
const thoseValues = thatData.getAll(key)
if (theseValues.length !== thoseValues.length) {
return true
}
if (theseValues.some(unequal, thoseValues)) {
return true
}
}
return false
}
},
changes: {
configurable: true,
get: function changes () {
'use strict'
var thisData = new FormData(this)
var that = this.cloneNode(true)
// avoid masking: https://developer.mozilla.org/en-US/docs/Web/API/HTMLFormElement/reset
HTMLFormElement.prototype.reset.call(that)
var thatData = new FormData(that)
const theseKeys = Array.from(thisData.keys())
const thoseKeys = Array.from(thatData.keys())
const created = new FormData()
const deleted = new FormData()
const updated = new FormData()
const allKeys = new Set(theseKeys.concat(thoseKeys))
function unequal (value, index) {
return value !== this[index]
}
for (const key of allKeys) {
const theseValues = thisData.getAll(key)
const thoseValues = thatData.getAll(key)
const createdValues = theseValues.slice(thoseValues.length)
const deletedValues = thoseValues.slice(theseValues.length)
const minLength = Math.min(theseValues.length, thoseValues.length)
const updatedValues = theseValues.slice(0, minLength).filter(unequal, thoseValues)
function append (value) {
this.append(key, value)
}
createdValues.forEach(append, created)
deletedValues.forEach(append, deleted)
updatedValues.forEach(append, updated)
}
return {
created: Array.from(created),
deleted: Array.from(deleted),
updated: Array.from(updated)
}
}
}
})
document.querySelector('[value="Check"]').addEventListener('click', function () {
if (this.form.isChanged) {
console.log(this.form.changes)
} else {
console.log('unchanged')
}
})
<form>
<div>
<label for="name">Text Input:</label>
<input type="text" name="name" id="name" value="" tabindex="1" />
</div>
<div>
<h4>Radio Button Choice</h4>
<label for="radio-choice-1">Choice 1</label>
<input type="radio" name="radio-choice-1" id="radio-choice-1" tabindex="2" value="choice-1" />
<label for="radio-choice-2">Choice 2</label>
<input type="radio" name="radio-choice-2" id="radio-choice-2" tabindex="3" value="choice-2" />
</div>
<div>
<label for="select-choice">Select Dropdown Choice:</label>
<select name="select-choice" id="select-choice">
<option value="Choice 1">Choice 1</option>
<option value="Choice 2">Choice 2</option>
<option value="Choice 3">Choice 3</option>
</select>
</div>
<div>
<label for="textarea">Textarea:</label>
<textarea cols="40" rows="8" name="textarea" id="textarea"></textarea>
</div>
<div>
<label for="checkbox">Checkbox:</label>
<input type="checkbox" name="checkbox" id="checkbox" />
</div>
<div>
<input type="button" value="Check" />
</div>
</form>
I really like the contribution from Teekin above, and have implemented it.
However, I have expanded it to allow for checkboxes too using code like this:
// Gets all form elements from the entire document.
function getAllFormElements() {
// Return variable.
var all_form_elements = Array();
// The form.
var Form = document.getElementById('frmCompDetls');
// Different types of form elements.
var inputs = Form.getElementsByTagName('input');
var textareas = Form.getElementsByTagName('textarea');
var selects = Form.getElementsByTagName('select');
var checkboxes = Form.getElementsByTagName('CheckBox');
// We do it this way because we want to return an Array, not a NodeList.
var i;
for (i = 0; i < inputs.length; i++) {
all_form_elements.push(inputs[i]);
}
for (i = 0; i < textareas.length; i++) {
all_form_elements.push(textareas[i]);
}
for (i = 0; i < selects.length; i++) {
all_form_elements.push(selects[i]);
}
for (i = 0; i < checkboxes.length; i++) {
all_form_elements.push(checkboxes[i]);
}
return all_form_elements;
}
// Sets the initial values of every form element.
function setInitialFormValues() {
var inputs = getAllFormElements();
for (var i = 0; i < inputs.length; i++) {
if(inputs[i].type != "checkbox"){
initial_values.push(inputs[i].value);
}
else
{
initial_values.push(inputs[i].checked);
}
}
}
function hasFormChanged() {
var has_changed = false;
var elements = getAllFormElements();
var diffstring = ""
for (var i = 0; i < elements.length; i++) {
if (elements[i].type != "checkbox"){
if (elements[i].value != initial_values[i]) {
has_changed = true;
//diffstring = diffstring + elements[i].value+" Was "+initial_values[i]+"\n";
break;
}
}
else
{
if (elements[i].checked != initial_values[i]) {
has_changed = true;
//diffstring = diffstring + elements[i].value+" Was "+initial_values[i]+"\n";
break;
}
}
}
//alert(diffstring);
return has_changed;
}
The diffstring is just a debugging tool

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