Handling forms with multiple actions - javascript

Let's say I have an Admin page with a list of items, and I have various capabilities to modify those records -- Change its name, Delete it, Clear its contents, etc. For example a row would be rendered similar to the following:
const row =`<tr id="id${this.id}">
<td name="name">
<input type="text" placeholder="Set name" value=${this.name} />
<input type="submit" name="setName" value="Save" />
</td>
<td name="size">${this.set.size}<td/>
<td name="elements"><b>{ ${this.renderSetElements()} }</td>
<td name="actions">
<input type="text" placeholder="Add element" />
<input type="submit" name="addElement" value="Add" />
<input type="submit" name="clearElements" value="Clear" />
<input type="submit" name="deleteSet" value="Delete" />
</td>
</tr>`
What would the proper way to add forms here? Should there be one form around the row? Should there be four forms per row -- one for each action? (setName, addElement, clearElements, deleteSet)? Or what is the suggested way to accomplish the above? Additionally, is identifying the row as id${this.id} appropriate, or what's usually the contention for something like that?

The short answer is that you can have a
The form inside a cell td.
<table>
<tr><td><form>...</form></td></tr>
<tr><td><form>...</form></td></tr>
</table>
You can have a table inside a form
<form>
<table>
<tr><td>...</td></tr>
<tr><td>...</td></tr>
</table>
</form>
Or you can ditch the form element and use JavaScript to do Ajax:
In this case, I will be using the Javascript library jQuery since it simplifies a lot of stuff; however, you can implement this with pure Javascript if you want to.
// Wait for the document to be fully loaded
$(document).ready(function(){
$(".submit").on("click", function(event){
event.preventDefault();
console.log("submit...");
var url = "https://httpbin.org/get";
var data = {
id: $('#id').val()
};
$.get(url, data, function(result){
console.log("Server received the id number: ", result.args.id);
});
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table>
<tr>
<td><input class="inputs" id="id" value="0"/></td>
</tr>
<tr>
<td><button class="submit" id="add">Add</button></td>
</tr>
</table>
In your particular case, you might try generate these rows dynamically and using Ajax to send the information to the server, without having to refresh the whole page. Here is an example:
(function(){
let count = 0;
function createColumn(){
let column = $('<td>');
let text = $(`<input type="text" placeholder="Set name" value="${count}">`);
let submit = $('<button class="save" type="submit" name="setName">Save</button>');
column.append(text);
column.append(submit);
return column;
}
function createRow(){
let row = $('<tr>');
row.attr("id", count++);
row.append(createColumn());
return row;
}
let table = $('#table');
$('#btnAdd').on('click', () => {
table.append(createRow());
});
table.on('click', '.save', function() {
let text = $(this).prev().val();
console.log("INPUT TEXT:", text);
});
})();
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<button id="btnAdd">Add Row</button>
<table id="table">
</table>
I hope you found this informative, useful, and that you can apply it to your particular issue.

Related

Clear contents of multiple input fields?

Hi I am dynamically adding rows with a button and when I am finished entering information, I would like it to then clear the contents. The button "Add Pokemon" is the one I want to press and it should clear all the contents.
function addPokemon() {
var pokemonName = document.getElementById("pokemon-name-container");
pokemonName.innerHTML = document.getElementById("pokemon-names").value;
for (var i = 0; i < element.length; i++) {
if (element[i].value !== "undefined") {
pokemonArray.push(element[i].value);
}
}
console.log(pokemonArray);
for (var i = 0; i < pokemonArray.length; i++) {
document.getElementById("pokemon-container").innerHTML += "<li>" + pokemonArray[i] + "</li>";
}
document.getElementById("pokemon-name-container").value = "";
document.getElementById("move-name").value = "";
}
This is my function I am using. ^^
And below is my HTML vv
<div>
<table>
<tbody id="tbody">
<tr>
<td>
<div id="pokemon-name-container">
<p>Pok&eacutemon Name:</p>
<input type="text" id="pokemon-names" size="30">
</td>
</tr>
<tr>
<td>
<p class="moves">Moves:</p>
</td>
</tr>
<tr>
<td>
<input class="move-container" type="text" id="move-name" placeholder="Enter move here">
</td>
<td>
<input class="button-container" type="button" id="remove-btn" value="Remove Move" onclick="removeRow()">
</td>
</tr>
</tbody>
</table>
</div>
<div>
<input type="button" class="add-move-button" id="add-move-button" value="Add Move" onclick="addRow()">
</div>
<div>
<input type="button" class="add-pokemon-button" id="add-pokemon-button" value="Add Pokémon" onclick="addPokemon()">
</div>
You could put to all the inputs you create a unique class that defines them under a parent with a unique id. Then use inside the function of javascript the next pice of code const childs = document.querySelectorAll('#idParent.classChilds') this querySelectorAll is kind of like the getElementsById but uses selectors of CSS so it's more powerfull. The querySelectorAll returns you a NodeList of all the elements that matches de DOM with the CSS query.
Then you would only need to do something similar to this using functional programming:
const childs = document.querySelectorAll('#idParent .classChilds')
childs.forEach(child=>{
child.value = ""
})
I'm not sure if this code works (I'm not with an code editor and a browser to check if there isn't mistakes), as I said, you could do something similar to it
HOPE IS HELPFULL
FYI, try to avoid the selectors like getElementById or getElementsByClass....
Try to use this:
document.querySelector('CSS SELECTOR') // GIVES YOU THE FIRST MATCH OF THE CSS SELECTOR
document.querySelectorAll('CSS SELECTOR') // GIVES YOU A NODELIST WITH ALL MATCHES

Initially Hiding and then Dynamically Adding and Removing Rows

I'm working on a request form. It needs to list the study team members on a research study besides the PI and submitter of the form. However, some studies will have no additional team members so I would like the row to remain hidden until someone clicks the Add Team Member button.
What's working:
1. I've got the element hidden on initially loading the page.
2. Clicking add rows adds the correct rows.
3. Clicking remove will remove a row.
Current problems:
1. If someone adds a team member then removes all the team members, clicking add team member will not add a row.
2. When the element is hidden on initial page load, the first time the Add Team Member button is clicked it adds two rows.
Here's my current code with only the relevant section of the form.
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="assets/css/test.css" />
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>
<script type="text/javascript">
function addTableRow(jQtable){
jQtable.each(function(){
var tds = '<tr>';
jQuery.each($('tr:last td', this), function() {tds += '<td>'+$(this).html()+'</td>';});
tds += '</tr>';
if($('tbody', this).length > 0){$('tbody', this).append(tds);
}else {$(this).append(tds);}
});
}
</script>
<script>
function myDeleteFunction() {
document.getElementById("stmember").deleteRow(0);
}
</script>
<script type="text/javascript">
$(function() {
$('#add').click(function() {
$('#stmember').show();
});
});
</script>
<style>
#stmember {
display: none
}
</style>
</head>
<body>
<h3><strong>Other Study Team Members:</strong></h3>
<FORM>
<table id="stmember">
<tr>
<td>Name:
<label for="namest1"></label>
<input type="text" name="namest1" id="namest1" placeholder="First Name, Last Name" />
</td>
<td>JHED ID:
<label for="jhedst1"></label>
<input type="text" name="jhedst1" id="jhedst1" />
</td>
<td>Email:
<label for="emailst1"></label>
<input type="email" name="emailst1" id="emailst1" placeholder="you#example.com" />
</td>
</tr>
</table>
<CENTER>
<button type="button" id="add" onclick="addTableRow($('#stmember'));">Add Study Team Member</button>
<button type="button" onclick="myDeleteFunction()">Remove Study Team Member</button>
</CENTER>
</FORM>
</body>
</HTML>
Here are a couple solutions for you:
Solution 1
Store the HTML of the row in your addTableRow function within a variable. That way you can use tokens for the input IDs to ensure they are unique. Also, you won't have to provide the first row in your HTML, as it will be created through your JS function. Something like:
var template = "<tr><td>Name:<label for="namest1"></label><input type="text" name="namest!!TOKEN!!" id="namest!!TOKEN!!" placeholder="First Name, Last Name" /></td><td>JHED ID:<label for="jhedst1"></label><input type="text" name="jhedst!!TOKEN!!" id="jhedst!!TOKEN!!" /></td><td>Email:<label for="emailst1"></label><input type="email" name="emailst!!TOKEN!!" id="emailst!!TOKEN!!" placeholder="you#example.com" /></td></tr>";
Solution 2
Use a templating engine like jsRender or Mustache.
Conclusion
The cleanest method would be to use a templating engine, if you're game for that. But using a string to store the template within your function will work.
If you're using jQuery, I'd fully commit to using that instead of mixing vanilla JS, as with jQuery you can use clone and remove effectively for what you're trying to achieve. Also, if you plan on submitting this as a form, please be sure to add [] to your input names so you can parse each row properly as the names are the same on the input fields. Please see the below snippet:
function addTableRow() {
var $tableRow = $('tr.model-row:first-child');
var $clonedRow = $tableRow.clone().show();
$('#stmember').append($clonedRow);
}
function myDeleteFunction() {
var $memberTRs = $('tr', '#stmember');
// If rowcount === 1, hide first row, don't remove it!!
var rowCount = $memberTRs.length;
if (rowCount === 1) {
$('tr.model-row:first-child').hide();
return;
}
$memberTRs.last().remove();
}
jQuery(function() {
$('#delete').click(function() {
myDeleteFunction();
});
$('#add').click(function() {
addTableRow();
});
});
.model-row {
display: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<body>
<h3><strong>Other Study Team Members:</strong></h3>
<FORM>
<table id="stmember">
<tbody>
<tr class="model-row">
<td>Name:
<label for="namest1"></label>
<input type="text" name="namest1[]" id="namest1" placeholder="First Name, Last Name" />
</td>
<td>JHED ID:
<label for="jhedst1"></label>
<input type="text" name="jhedst1[]" id="jhedst1" />
</td>
<td>Email:
<label for="emailst1"></label>
<input type="email" name="emailst1[]" id="emailst1" placeholder="you#example.com" />
</td>
</tr>
</tbody>
</table>
<CENTER>
<button type="button" id="add">Add Study Team Member</button>
<button type="button" id="delete">Remove Study Team Member</button>
</CENTER>
</FORM>
</body>
When you create a row, you use the last existing row to create it. But if you remove all the row you lose your example of row.
You can easily fix your problem by checking when you remove a Row, if it's the last one, add a new row before remove the last one.

jQuery remove too many fields

I am creating a form where the user can add fields one after the other. For each field I am setting a "remove" button. Each field is in a table, so I give a random id to the table, and pass this id to a removing function doing: $(random-id).remove().
The strange thing is that jQuery is removing all of the tables created by the user, as if the id is not taken into account
Why that can be?
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="http://code.jquery.com/ui/1.11.2/themes/smoothness/jquery-ui.css">
<script src="http://code.jquery.com/jquery-1.10.2.js"></script>
<script src="http://code.jquery.com/ui/1.11.2/jquery-ui.js"></script>
<script>
function delete_field(id)
{
$("#"+id+"").remove();
}
function add_form_field()
{
id = Math.random();
html = '<table id='+id+'>\
<tr><td>Label </td></tr>\
</table>\
\
<button onclick=delete_field('+id+')>remove</button>';
$("form").append(html);
}
</script>
</head>
<body>
<form>
</form>
<button onclick=add_form_field()> Add a field </button>
</body>
</html>
Don't use Math.random, rather increment a number and create ID like: #tab_NN.
Add an ID to your Form Element id=myForm
Delegate click events to dynamically generated delete buttons using .on()
While removing the table that matched the button data-* attribute, delete the button too using .add( this ) (where this stays for the clicked button)
var id = 0;
function delete_field(event){
event.preventDefault();
$("#tab_"+ $(this).data("remove")).add(this).remove();
}
function add_form_field(){
id += 1;
var html = '<table id="tab_'+ id +'">'+
'<tr><td>Label</td></tr>'+
'</table>'+
'<button data-remove="'+id+'" class="remove">remove</button>';
$("#myForm").append(html);
}
$('#addField').on('click', add_form_field);
$('#myForm').on('click', '.remove', delete_field);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="myForm"></form>
<button id="addField"> Add a field </button>
The code above allows you to have changes in the future markup cause it targets a specific ID, but in case your DELETE buttons will always be exactly after table than you can do it without assigning ID's, by simply using .prev("table"):
http://jsbin.com/wuqati/1/edit
function delete_field(event){
event.preventDefault();
$(this).prev("table").add(this).remove();
}
function add_form_field(){
var html = '<table>'+
'<tr><td>Label</td></tr>'+
'</table>'+
'<button class="remove">remove</button>';
$("#myForm").append(html);
}
$('#addField').on('click', add_form_field);
$('#myForm').on('click', '.remove', delete_field);
Math.random() produces a floating point number less than 1 which is invalid for an id. You can use a global variable to keep count of the rows created. Keep in mind that a CSS ID can not start with a digit. So append the number to a string before using it as an ID.
<script>
function delete_field(id)
{
$("#"+id+"").remove();
}
tableID = 1;
function add_form_field()
{
id = 'table-'+tableID;
html = '<table id='+id+'>\
<tr><td>Label </td></tr>\
</table>\
\
<button onclick=delete_field('+id+')>remove</button>';
$("form").append(html);
tableID++;
}
</script>
Why not simplify this by doing something like below.
$(".remover").click(function() {
$(this).parent().remove();
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table>
<tr>
<td>
<input type="text" placeholder="input One"/> <input type="button" class="remover" value="remove" />
</td> </tr>
<tr>
<td>
<input type="text" placeholder="input Two"/> <input type="button" class="remover" value="remove" />
</td> </tr>
<tr>
<td>
<input type="text" placeholder="input Three"/> <input type="button" class="remover" value="remove" />
</td> </tr>
</table>

How to clear Input data from within JQuery Div

I have a simple form users can fill out and also add a new form to add multiple entries.
Everything works fine except when I enter data in the first set of inputs and click create new memberships it will take the data from the form and put it in the text boxes.
How can I stop that?
http://jsfiddle.net/811yohpn/2/
I have tried a couple different ways.
$('#education').find('input:text').val('');
$('#education: input').val('');
However that will clear all entries.
Call find on the newDiv, instead of all inputs within #education.
Updated fiddle
newDiv.find('input:text').val('');
var ed = 1;
function new_education() {
ed++;
var newDiv = $('#education div:first').clone();
newDiv.attr('id', ed);
var delLink = '<a class="btn btn-danger" style="text-align:right;margin-right:65px" href="javascript:deled(' + ed + ')" > Delete Education ' + ed + ' </a>';
newDiv.find('tr:first th').text('Education ' + ed);
newDiv.append(delLink);
newDiv.find('input:text').val(''); // <----------- added this
$('#education').append(newDiv);
}
function deled(eleId) {
d = document;
var ele = d.getElementById(eleId);
var parentEle = d.getElementById('education');
parentEle.removeChild(ele);
//ed--;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<legend>Education</legend>
<div id="education">
<div id="1">
<table border=3>
<tr>
<th colspan="4" style="background-color:#b0c4de;">Education 1</th>
</tr>
<tr>
<td>
<label>School Name</label>
<input type="text" name="schoolname[]" maxlength="30" size="30"/>
</td>
<td>
<label>Degree Type</label>
<input type="text" name="degreetye[]" maxlength="30" size="30"/>
</td>
<td>
<label>Degree Field</label>
<input type="text" name="degreefield[]" maxlength="30" size="30"/>
</td>
</tr>
</table>
</div>
</div>
<br/><a class="js-addNew btn btn-info" href="javascript:new_education()"> Add New Education </a>
You need to clear the inputs under the cloned element
newDiv.find('input').val('')
Demo: Fiddle
Your selectors are selecting all input elements within the #education container, that is not what you want. The newDiv variable refers to the newly created element so you can use that to find the input elements within in and then clear it

using jquery or javascript

I have this code in my page. with two textboxes and one textarea.
<fieldset>
<legend><b>Search Criteria</b></legend>
<table>
<tr>
<td>
Find Text:
<input type="text" style="width:150px" id="txtFind"/>
<input type="button" id="btnfind" value=" Find "/>
</td>
</tr>
<tr>
<td>
Replace Text:
<input type="text" style="width:150px" id="Text1"/>
<input type="button" value="Replace Text" id="btnReplace"/>
</td>
</tr>
</table>
</fieldset>
<br />
<fieldset>
<legend><b>Result</b></legend>
<table>
<tr>
<td>
<%:Html.TextArea("Hello ASP.NET here")%>
</td>
</tr>
</table>
</fieldset>
in my first textbox if I enter "here" then I click the Find button it should find the text
if I enter "MVC" on second text box click Replace Text button it should replace the text "here" to "MVC" ("Hello ASP.NET MVC").,
Please can any one help me out? How to do this with javascript or jquery?
Thanks
Asuming your textarea has id="textarea", you should do this:
$("#btnfind").click(function(){
var find = $("#txtFind").val();
var replace = $("Text1").val();
var text = $("#textarea").val();
while(text.indexOf(find) >= 0){
text = text.replace(find, replace);
}
$("#textarea").val(text);
});
(Note that we're not using Regular expressions to replace because the text to find is dynamic so we'd have to escape the 'find' text).
Hope this helps. Cheers
this should get you started: http://jsfiddle.net/DD7t5/
using jQuery and a highlight jQuery plugin
var $result = $('#result'),
$txtFind = $('#txtFind'),
$txtReplace = $('#txtReplace');
$('#btnFind').click(function() {
$result.removeHighlight();
var findValue = $txtFind.val();
if (findValue.length > 0) {
$result.highlight(findValue) // find and highlight
}
});
$('#btnReplace').click(function() {
$result.text($result.text().replace(eval('/' + $txtFind.val() + '/gi'),
$txtReplace.val())); // replace
});

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