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I have tried to create a search function with Javascript, but it doesn't work.
function contains(text_one, text_two) {
if (text_one.indexof(text_two) != -1)
return true;
}
$("#searchText").onkeyup(function(){
var searchText = $("searchText").val().toLowerCase()
$("ul li").each(function() {
if (!contains($(this).text().toLowerCase(), searchText))
$(this).hide();
else
$(this).show();
});
});
You can debug all of these issues by yourself using the developer console. If you press F12 in your browser you will be able to see all the errors that your JS code is raising and address them.
From the above, I can see that you have several issues in your code:
You should use indexOf, not indexof, as JS is case-sensitive
The $('searchText') selector is missing the id prefix: $('#searchText')
jQuery has no onkeyup method, it's just keyup.
Also note that you can improve the logic by using toggle() and just returning the result of the indexOf comparison in the contains() function. Try this:
function contains(text_one, text_two) {
return text_one.toLowerCase().indexOf(text_two.toLowerCase()) != -1;
}
$("#searchText").keyup(function(){
var searchText = $(this).val();
$("ul li").each(function() {
$(this).toggle(contains($(this).text(), searchText));
});
});
Example fiddle
Related
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I'm trying to validate that two characters and a number were correctly input.
var studentValid = /^[MTWTF][AL][1-9]$/i;
if (studentValid.test(studentTemp.value))
{
alert("true");
}
else
{
alert("false");
}
Yet everything I enter turns out false?
The problem is with your regexp (/^[MTWTF][AL][1-9]$/i). What this tells you is that you first want one of the characters M,T,W,T or F, and after that either A or L and finaly a number (and nothing before or after this).
So for example
ML4, WA5, FL9
will give you true
while
AM9, ML0, MMA5, MA99
will give you false.
Is this the pattern you are trying to match? There is nothing else wrong with your code and a valid value will give you true, for example:
var studentValid = /^[MTWTF][AL][1-9]$/i;
var value = 'MA9';
if (studentValid.test(value))
{
alert("true");
}
else
{
alert("false");
}
When working with regexp, it can be very usefull to use a tool to help you build it, check out https://regex101.com/r/A5FOIh/3 where you can try your different studentTemp.value to see if they match.
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JQuery selector with multiple conditions Email Validation
hi i have to validate Email address.
my following code works fine:
contact_email = $('#contact_email').val();
var reg = /^([A-Za-z0-9_\-\.])+\#([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
//if Email address is empty it allowed but if it have any value then check whether proper email address or not
if(contact_email && !reg.test(contact_email)) {
err += 1;
$('#contact_email').addClass('boxerror');
}
it works but following code not work
contact_email = $('#contact_email').val().is(reg.test(this.val())).addClass('boxerror');
1.what mistake i had done?
2.JQuery with selector with multiple condition is possible
You are misunderstanding how .is(...) works. You have to pass a jquery selector in is() function, or you can also pass a function which will be called by jquery for all the function. And it will return a boolean value.
To accomplish your task you will be needed to use filter(...).
Here is the code to help you :
$("#contact_email").filter(function(index, element) {
return !reg.test(element.value);
}).addClass("boxerror");
Full documentation for filter() is here
Hence :
Mistake: you were using is() in wrong situation.
selector with multiple condition is possible if implemented jquery nicely.
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When I try to take a value from a textfield, it works when I use this:
var name = $("input[name='Event[name]']").serializeArray();
name = name[0].value;
I can't get value from a textarea:
var desc = $("input[name='Event[desc]']").serializeArray();
Here is a link to working variant with a textfield. I tried with a textarea and I don't understand why it doesn't work.
Here buddy: http://jsfiddle.net/jVUsZ/
$(document).ready(function () {
var val = $.trim($("textarea").val());
if (val != "") {
alert(val);
}
});
$(document).ready(function () {
var val = $.trim($("textarea").val());
if (val.length !== 0) {
alert(val);
}
});
It is difficult to tell given that you have shown us only part of your code but:
var desc = $("input[name='Event[desc]']").serializeArray();
Your selector here only matches <input> elements. If you want to match a <textarea> element, then you have to replace input with textarea in your selector.
var desc = $("textarea[name='Event[desc]']").serializeArray();
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I'm making an array of textstrings like this:
phone = $(data).find('.tel a')
I would like to apply a substring(8) to every item in the array called phone. Is a for-loop the best way to do it?
phone, as it stands, contains a jQuery object, which is an Array-like Object of DOM elements. If you want to iterate over all of them and get their inner text, applying .substring(8) to each, and building an array out of them, you can use something like this:
var phoneArray = $(data).find(".tel a").map(function (i, el) {
return $(el).text().substring(8);
}).get();
DEMO: http://jsfiddle.net/96HWv/
(in the demo, I had to emulate what data could be, although I'm guessing it is an HTML string in your real code)
You can use the map() method :
phone = phone.get().map(function(e) { return $(e).text().substring(8) });
FIDDLE
You can use the .each() function for this... Something like:
$(data).find('.tel a').each(function() {
$(this).text(function(index,text) {
return text+"substring(8)";
});
});
You can let jQuery do the work for you.
$(data).find('.tel a').addClass('substring');
jQuery will traverse the array of elements returned and add the class to all of them.
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if( hasWhiteSpace($(this).find(".nospace:input").val()) ){
$(this).find(".nospace:input").filter(function() {
return hasWhiteSpace(this.value) == true;
}).addClass("blank");
setError(".motd_register_company","There must be no space in between.");
return false;
}
There is something wrong about my code above, and the code only validate the first input, while the others not, how could I validate all the "nospace" class that I have in my form?
can you guys trim my code if there is something wrong.
Are you trying to recursively search elements for a particular classname? If so:
$('input.class_name').each(function() {
// Do you stuff to this input element
});
jQuery.each("input.nospace", function(i, el){
var self = $(el);
if(hasWhiteSpace(self.val()) self.addClass("blank");
});