I currently try to restrict the the maximal amount of characters allowed in a textarea.
With:
<textarea rows="4" cols="50" maxlength="50">
It works like it should in Firefox, however there seems to be no effect in IE which poses a problem since quite a lot of the website-users still use IE.
Do you have any suggestions or a workaround?
You can use Javascript to implement maxlength in Internet Explorer.
<textarea rows="4" cols="50" maxlength="50" onKeyPress="return(this.value.length < 50);">
I am suggesting this since you had placed php in the tags, you can truncate the input from the server side using substr
$trunc = substr($_POST['textareaname'], 0, 50);
alternatively you can also use Javascript function.
UPDATE to your comment on how to provide a feedback to the user when limit is reached.
$("#element").keypress(function (e) {
var str = $(this).val();
if (str.length > 100) {
e.preventDefault();
alert('You have reached max limit');
return false;
}
});
Related
I am looking for a resolution on how to limit the allowed rows and columns to input in a textarea in an Angular way. I found a lot of solution using a jQuery, and it is a little bit messy. I am wondering if there's an Angular way to do this.
So let say, I do have a text area that needs to strictly limit the number of rows and columns. I set this up this way.
<textarea matInput formControlName="cardDescription" rows="5" cols="5" placeholder="Card Description"></textarea>
Unfortunately, this line of code only initialises the view for about 5 rows and I think the cols does not do anything.
What am I missing here?
Try to do this
html:
<textarea cols="30" rows="5" [(ngModel)]="data" (ngModelChange)="doSomething($event)"></textarea>
.ts:
data: any = '';
doSomething(event){
var lines = 5;
let newLines = this.data.split("\n").length;
if(event.keyCode == 13 && newLines >= lines) {
console.log('limit exceeded')
}
else {
console.log('input under limit')
}
}
How do you disable Autocomplete in the major browsers for a specific input and/or the complete form.
I found this solution:
<input type="text" name="foo" autocomplete="off" />
However, this does not seem to work in all browsers. I've had problems in firefox for instance.
Edit:
My firefox issue has been resolved. That leaves the following: Can I disable autocomplete on a form or do I have to give every input autocomplete="off"
Autocomplete should work with the following <input> types: text, search, url, tel, email, password, datepickers, range, and color.
But alas, you could try adding autocomplete='off' to your <form> tag instead of the <input> tag, unless there's something preventing you from doing that.
If that doesn't work, you could also use JavaScript:
if (document.getElementsByTagName) {
var inputElements = document.getElementsByTagName(“input”);
for (i=0; inputElements[i]; i++) {
if (inputElements[i].className && (inputElements[i].className.indexOf(“disableAutoComplete”) != -1)) {
inputElements[i].setAttribute(“autocomplete”,”off”);
}
}
}
Or in jQuery:
$(document).ready(function(){
$(':input').live('focus',function(){
$(this).attr('autocomplete', 'off');
});
});
You could try manually clearing text fields on page load with javascript, for example:
window.onload = function() {
elements = document.getElementsByTagName("input");
for (var i=0; i<elements.length; ++i) {
elements[i].value = "";
}
};
This might not work if it's executed before the autofill. Another option is to generate part of the name attributes for your inputs randomly each time the page is rendered (and strip them out when the server handles the submit), then the browser won't try to autocomplete.
See also Is autocomplete="off" compatible with all modern browsers?
I found this one. It hides on chrome, edge and opera
<form autocomplete="off">
<input role="presentation" />
</form>
IE: autocomplete
Firefox， Chrome， Opera: disableautocomplete
<input type="text" autocomplete="off" disableautocomplete id="number"/>
in html5, there is tag "required" for input,
eg:<input type="text" required="required" value="" />
but it is working on Firefox,Opera and Chrome, but not for IE and Safari, i tried to include <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>, but it is still not working !
As Explosion Pills mentioned in his comments, the required form attribute is not supported by Safari or versions of Internet Explorer lower than 10.
You can get around this by using a third-party JavaScript plugin that will enforce form validation regardless of browser version. See https://github.com/dilvie/h5Validate.
You can't use html5shiv to add require.
Try something like this (uses JQuery): http://jsfiddle.net/DfCHu/
$('form').submit(function() {
var empty_fields = $('input').filter(function() {
//return empty required fields
return $(this).attr("required") && $(this).val() === "";
});
// if empty required field stop the form submitting and let the user know
if(empty_fields.length){
alert('something required');
return false;
}
});
I want a textbox to be in focus when my webpage loads. If you go to google.com you can see the textbox is already in focus. That's what I want.
Heres my form:
<form id="searchthis" action="#" style="display:inline;" method="get">
<input id="namanyay-search-box" name="q" size="40" x-webkit-speech/>
<input id="namanyay-search-btn" value="Search" type="submit"/>
Give your text input the autofocus attribute. It has fairly good browser-support, though not perfect. We can polyfill this functionality rather easily; I've taken the liberty to write up an example below. Simply place this at the bottom of your document (so that when it's ran, the elements already exist), and it will find your autofocus element (note: you should have only one, otherwise you could get inconsistent results), and draw focus upon it.
(function () {
// Proceed only if new inputs don't have the autofocus property
if ( document.createElement("input").autofocus === undefined ) {
// Get a reference to all forms, and an index variable
var forms = document.forms, fIndex = -1;
// Begin cycling over all forms in the document
formloop: while ( ++fIndex < forms.length ) {
// Get a reference to all elements in form, and an index variable
var elements = forms[ fIndex ].elements, eIndex = -1;
// Begin cycling over all elements in collection
while ( ++eIndex < elements.length ) {
// Check for the autofocus attribute
if ( elements[ eIndex ].attributes["autofocus"] ) {
// If found, trigger focus
elements[ eIndex ].focus();
// Break out of outer loop
break formloop;
}
}
}
}
}());
After some initial testing, this appears to provide support all the way back to Internet Explorer 6, Firefox 3, and more.
Test in your browser of choice: http://jsfiddle.net/jonathansampson/qZHxv/show
The HTML5 solution of Jonathan Sampson is probably the best. If you use jQuery, steo's sample should work, too. To be complete, here you go plain JS solution for all browsers and IE10+
window.addEventListener("load",function() {
document.getElementById("namanyay-search-box").focus();
});
$(document).ready(function(){
..code..
$('.textbox-class-name').focus();
..code..
});
Or you can try it on $(window).load()
This works in Chrome and any other browser that supports placeholder text in HTML5
<input id="name" name="name" type="text" placeholder="Please enter your name..." required /> <br />
But, it doesn't work in 3.5 and earlier of Firefox, and obviously IE8, and possibly other browsers.
How do I achieve the same thing (preferably in HTML/CSS - if not I am open to suggestions), to support all the older browsers? If not every single browser, at least Firefox and IE.
Safari and Chrome already support it (or the latest versions anyway).
Thanks.
One day I'll get around to properly documenting this, but see this example: http://dorward.me.uk/tmp/label-work/example.html
In short — position a <label> under a transparent <input> using <div> to provide background colour and borders.
Then use JS to determine if the label should be visible or not based on focusing.
Apply different styles when JS is not available to position the label beside the element instead.
Unlike using the value, this doesn't render the content inaccessible to devices which only display the focused content (e.g. screen readers), and also works for inputs of the password type.
I use this one: https://github.com/danbentley/placeholder
Lightweight and simple jQuery plugin.
Here is the simplest solution that I found working everywhere:
<input id="search"
name="search"
onblur="if (this.value == '') {this.value = 'PLACEHOLDER';}"
onfocus="if (this.value == 'PLACEHOLDER') {this.value = '';}"
/>
Replace PLACEHOLDER with your own.
At the moment, FF3 does not yet support the "placeholder" attribute of the "input" element. FF4, Opera11 and Chrome8 support it partially, i.e. they render the placeholder text in the field, but do not delete it when the user focuses in the field, which is worse that not supporting it at all.
I use the following snippet that I wrote with jQuery. Just add a class of textbox-auto-clear to any textbox on the page and you should be good to go.
<input type="text" value="Please enter your name" class="textbox-auto-clear" />
$(".textbox-auto-clear").each(function(){
var origValue = $(this).val(); // Store the original value
$(this).focus(function(){
if($(this).val() == origValue) {
$(this).val('');
}
});
$(this).blur(function(){
if($(this).val() == '') {
$(this).val(origValue);
}
});
});
I assume that you want to keep using the placeholder attribute for HTML5 browsers, in which case you'd have to do some browser detection and only apply the jQuery solution to browsers that don't support it.
Better yet, you can us the Modernizer library, as outlined in this answer.
Detecting support for specific HTML 5 features via jQuery
Here is a MooTools Plugin, that brings the placeholder to browsers that don't support it yet:
http://mootools.net/forge/p/form_placeholder
I use this one: https://github.com/Jayphen/placeholder
This lightweight and simple jQuery plugin is a fork of danbentley/placeholder.
Advantage: it adds a class "placeholder" to input fields that are temporarily filled.
Css ".placeholder {color:silver}" make the polyfill text look like a placeholder instead of regular input text.
Disadvantage: It doesn't polyfill the placeholder of a password field.
By the way...if anyone is interested...I found a nice elegant solution that is a jQuery plugin that is SOOO nice.
It literally is one line of jQuery, a minified js plugin, along with a simple class name on the input.
http://labs.thesedays.com/projects/jquery/clearfield/
It's the most beautiful thing I have discovered, next to 'Placeholder' in html.
The trick is to use javascript functions onBlur() and onFocus().
Here is the code that worked for me:
<script language="javascript" type="text/javascript" >
var hint_color = "grey", field_color = null;
var hinted = true;
function hint() { // set the default text
document.getElementById('mce-EMAIL').style.color = hint_color;
document.getElementById('mce-EMAIL').value = "<?php echo SUBSCRIPTION_HINT; ?>";
hinted = true;
}
function hintIfEmpty() { // set the default text, only if the field is empty
if (document.getElementById('mce-EMAIL').value == '') hint();
}
function removeHint() {
if (hinted) {
document.getElementById('mce-EMAIL').style.color = field_color;
document.getElementById('mce-EMAIL').value = "";
hinted = false;
}
}
function send() {
document.getElementById('subscription_form').submit();
hint();
}
</script>
<div style="position:absolute; display: block; top:10; left:10; ">
<form id="subscription_form" action="<?php echo SUBSCRIPTION_LINK; ?>" method="post" target="_blank">
<input type="email" value="" name="EMAIL" class="email" id="mce-EMAIL" style="width: 122px;" onBlur="hintIfEmpty();" onFocus="removeHint();" required>
<font style="position: relative; top:-1px;"><b>ok</b></font>
</form>
</div>
<script language="javascript" type="text/javascript" >
field_color = document.getElementById('mce-EMAIL').style.color;
hint();
</script>
SUBSCRIPTION_HINT (i.e.: "your e-mail" ) and SUBSCRIPTION_LINK (i.e.: the value of the 'action' tag in your EN mailchimp embed code...) are PHP constants used for localization.
For "placeholder" work in Firefox just add the attribute
::-moz-placeholder
in CSS tags.
Works for me, change your CSS to
::-webkit-input-placeholder {
color: #999;
}