I am trying to create a text input field that converts the input text to a "button" onblur. For example in the hotmail "new email page" when you enter email addresses it will make it into a little button-like object with a delete button when you enter a delimiter (semi-colon or comma). Anyone know how to do this?
I did a sort of workaround thing to what i want where i have a div with a border. In the div there is an input field with the borer invisible and a hidden button. I have a js function that takes the input value and makes the button visible with the value but this is not exactly what im looking for..
actually i just realised stackoverflow does this as well when im adding tags to the post
This is a multiple value field. Give a look at this one.
The feature is not so complex. It's an HTML list, and each value that you choose is converted into a LI node and appended to that list. The input field is inside the last LI, so its cursor can always be after the last choice. Besides, the input value is assigned to a hidden input, which can be used on the server-side as a comma-separated value.
Here's a simple way to fake it (and it looks like this is similar to what SO does for tags):
Create your text <input>, and make sure that its border and outline are both set to none.
Create a container for your tags (or buttons, or whatever) and put it next to the <input>.
Monitor the keydown event on the <input>; when the user tries to enter a "break" character (such as a semi-colon or comma), create the button, add it to the container, empty the <input>'s value, and prevent default (so that the "break" character isn't inserted into the tag, or left in the <input>).
That's the basic idea. Once you've done that, you can add event listeners/handlers to the buttons, or style them any which you'd like, etc.
Here's the simple example I cooked up:
var inp = document.getElementById('yourInput'),
tags = document.getElementById('yourContainer'),
breaks = {
186: 1, // semi-colon
188: 1 // comma
};
function createTag(txt) {
var elem = document.createElement('span');
txt = document.createTextNode(txt);
elem.appendChild(txt);
elem.className = 'tag';
tags.appendChild(elem);
}
function monitorText(e) {
e = e || window.event;
e = e.keyCode;
if (breaks[e]) {
e = inp.value;
inp.value = '';
createTag(e);
return false;
}
}
inp.focus();
inp.onkeydown = monitorText;
Related
I've built a page where you can filter results by typing into an input box.
Basic mechanics are:
Start typing, input event is fired, elements without matching text begin hiding
If input becomes empty (or if you click a reset button), all elements are shown again
I have noticed a problem, though, when highlighting text. Say I type "apple" into the input. Then I highlight it, and type "orange."
If an element exists on the page containing "orange," but it was already hidden because I filtered for "apple," it does not show up. I have gathered this is because the input never truly empties; rather, I simply replace "apple" with the "o" from orange before continuing with "r-a-n-g-e." This means I get a subset of "apple" results that contain "orange," as if I had typed "apple orange."
What I really want to do is clear my input on the keypress for the "o" in "orange" before hiding nonmatching elements, so I'm effectively searching the whole page for "orange."
What I've tried so far
1: Set input value to '' on select event:
$('.myinput').on('select', function(){
$(this).val('');
});
This doesn't work because it just deletes my highlighted text, which is unexpected. I only want to reset the input on the keypress following the highlight.
2: Include an if statement in my input event that checks if there is a selection within the input:
$('.myinput').on('input', function(){
var highlightedText = window.getSelection();
if($(highlightedText).parent('.myinput')) {
//reset my input
}
});
This doesn't work because it seems to fire on every keypress, regardless of if there is any actual selection. (Are user inputs always treated as selected?)
3: Add a select event listener to the input element, and set a variable to true if there's a selection. Then, in my input event, check if the variable is true on keypress.
$(function(){
var highlightedText = false;
$('.myinput').on('input', function(){
if(highlightedText = true) {
//reset my input
}
//do stuff
highlightedText = false;
});
$('.myinput').on('select', function(){
highlightedText = true;
});
});
I really thought this one would work because a basic console log in the select function only fires when I want it to – when text in the input is highlighted, but not when other text is highlighted and not when text is entered into the input. But alas, when I change that to a variable toggle, it seems to fire on every keypress again.
So the question is: How can I fire a function on input only if text in my input is highlighted?
I have found this question that suggests binding to the mouseup event, but it seems like overkill to check every single click when I'm only worried about a pretty particular situation. Also, that solution relies on window.getSelection(), which so far isn't working for me.
I've also found another question that suggests to use window.selectionEnd instead of window.getSelection() since I'm working with a text input. I tried incorporating that into option 2 above, but it also seems to fire on every keypress, rather than on highlight.
This answer is not about text selection at all.
But still solve your problem to refilter text when highlighted text is being replaced with new input.
var input = document.getElementById('ok');
var character = document.getElementById('char');
var previousCount = 0;
var currentCount = 0;
input.addEventListener('input', function(){
currentCount = this.value.length;
if (currentCount <= previousCount){
/*
This will detect if you replace the highlighted text into new text.
You can redo the filter here.
*/
console.log('Highlighted text replaced with: ' + this.value);
}
previousCount = currentCount;
char.innerHTML = this.value;
});
<input type="text" id="ok">
<div id="char"></div>
I'll agree with others that you will save yourself some trouble if you change your filtering strategy - I'd say you should filter all content from scratch at each keypress, as opposed to filtering successively the content that remains.
Anyway, to solve your immediate problem, I think you can just get the selection and see if it is empty. You can modify your second attempt:
$('.myinput').on('input', function(){
// get the string representation of the selection
var highlightedText = window.getSelection().toString();
if(highlightedText.length) {
//reset my input
}
});
EDIT
As this solution seems to have various problems, I can suggest another, along the lines of the comment from #Bee157. You can save the old search string and check if the new one has the old as a substring (and if not, reset the display).
var oldSearch = '';
$('.myinput').on('input', function(){
var newSearch = $('.myinput').val();
if (newSearch.indexOf(oldSearch) == -1) {
// reset the display
console.log('RESET');
}
oldSearch = newSearch;
// filter the results...
});
This approach has the added benefit that old results will reappear when you backspace. I tried it in your codepen, and I was able to log 'RESET' at all the appropriate moments.
I have a form with 4 fields. I want the first of the four to have the autofocus and be the first the user fills out. But then, either by tab or mouse or whatever, when the user gets to second field, I want the cursor to end up at the end of the string to start. There is a pre-filled string in that field.
I'm using Django so I have a form widget controlling the attributes. I can get the string to show up and even get the cursor to the end, but this always causes autofocus as well on that second field. I haven't managed to get both.
Here is code I'm using so far:
Django
field = forms.URLField(
widget = forms.URLInput(
attrs = {
'placeholder': 'enter field',
# call to javascript function - this works
'onfocus': 'add_string("field_id", "string")',
}
)
)
JavaScript:
// add string to element
function add_string(id, string) {
var input = document.getElementById(id);
input.value = string;
}
I've played around with various JS scripts but to no avail. I then found setSelectionRange and played around with this like so:
input.setSelectionRange(7, 7)
Where 7 would be end of the particular "string" in the onfocus JavaScript function call, but I could't get this to work...
Finally, I played around with some jQuery that looked like this:
// focus after string, no highlight
$(document).ready(function() {
var $field = $("#field_id");
var old_val = $field.val();
$field.focus().val('').val(old_val);
});
But this did the same thing: brought initial focus to second field and brought cursor to the end.
Any idea how I can do this, get both autofocus on field one but get cursor to jump to end of pre-filled string of field two on it's focus? Might be a nice trick if I knew how to do it.
You're almost there, you just need to fire your code when your form field is focused, instead of on document ready. In my tests it was necessary to add a zero timeout, because otherwise the field value remains selected:
$(document).ready(function() {
var $field = $("#field_id");
$field.on('focus', function() {
setTimeout(function() {
var old_val = $field.val();
$field.val('').val(old_val);
}, 0);
});
});
JSFiddle demo
Basically I need to create a textarea that is character limited, but will have a single word at the beginning, that they can't change.
It needs to be a part of the textarea, but I don't want users to be able to remove it or edit it.
I was thinking I could create a JQuery function using blur() to prevent the user from backspacing, but I also need to prevent them from selecting that word and deleting it.
UPDATE
I wrote this JQuery which seems to work great! However I like the solution below as it requires no Javascript.
<script type="text/javascript">
var $el = $("textarea#message_create_body");
$el.data('oldVal', $el.val());
$el.bind('keydown keyup keypress', function () {
var header = "Header: ";
var $this = $(this);
$this.data('newVal', $this.val());
var newValue = $this.data("newVal");
var oldValue = $this.data("oldVal");
// Check to make sure header not removed
if (!(newValue.substr(0, header.length) === header)) {
$(this).val(oldValue);
} else {
$(this).data('oldVal', $(this).val());
}
});
</script>
If you just want the textarea to show a prefix, you can use a label, change the position, and indent the textarea content. User will not notice the difference.
You can see how it works here: http://jsfiddle.net/FLEA3/.
How about just putting this word as a label next to the textbox? It may be confusing for the users not to be able to edit part of the text in the textbox.
Wouldn't it be better if you just alert the user that whatever he inputs in the textarea will be submitted with a "prefix" and then
show the prefix as a label before the textarea
add the prefix to the inputted text before submitting
I've a text field.
I'm to type the email in it.. eg. username#domain.com
What I want is that, as soon as the user types the char "#", the remaining part of the string gets masked so that it appears to the user viewing as username#**********
But in the backend, the real keys typed has to be captured somehow.
Is there a way to do that using javascript?
I have no idea why you'd want to do that, but you could add an onKeyPress function to the text field which adds the typed letter to a hidden field and then updates the text field with the starred-out copy.
Try with jQuery
$("input").keyup(function(){
var charIndex = $(this).val().indexOf("#");
if(charIndex!=-1){
charIndex++; // to start with character after #
$("#hidEmail").val($(this).val());
var replaceStr = "";
for(i=0;i< ($(this).val().length-charIndex) ; i++){
replaceStr=replaceStr+"*";
}
$(this).val($(this).val().replace($(this).val().substr(charIndex),replaceStr));
}
});
You can use OnKeyDown event to capture the user input.
Using a hidden field, keep the real value in there. When a new character is pressed, add it to the value from the hidden field and in the text field display the masked text.
Also you have to be carefull with special characters (backspace in particular).
I am very new to JavaScript. I want to add the same effect as that given in the text fields of this webpage in my own page... Can any one help me with how to do it or where to learn it from.
I want my text fields to show what have to be written there but it will change as soon as I write something in it..
Another thing is that a small popup block will appear when I click on a textbox which describes what and how to write in it... like password should be alpha numeric... or more than 6 character long ect.
If you want to do this in an accessible way (and you should):
If JS is available, position a transparent input over a label inside a container and toggle the transparency of the input based on its value at document load time and whenever the focus enters of leaves the element.
I've produced a minimal example.
As for the second part of the question. That's very similar. Just have another label beside the input, and toggle its visibility when the focus enters or leaves, ignoring the value of the input. I wouldn't bother with this though, advance notice of requirements is nice!
You might want to take a look at the WMD markdown editor:
http://wmd-editor.com/
This does exactly what you're looking for.
Look at jquery:
$('#textarea').onKeyup(
function(){
$('div#mydiv').innerHTML( $(this).val() );
}
);
Thats a start. :)
HTML Input field
<input type="text" name="name" id="name" value="" />
Javascript
function hint () {
var elem = document.getElementById('name'); // get element
elem.value = "Enter Name"; // fill element with value
elem.onfocus = function () { // if the user focuses
if (elem.value === "Enter Name") { // if there is default text
elem.value = ""; // clear it
}
}
elem.onblur = function () { // if user removes focus on field
if (elem.value === "") { // if the field is empty
elem.value= "Enter Name"; // fill in a default value
}
}
}
window.onload = hint; // call the function when the page has loaded