This question already has answers here:
What is the best regular expression to check if a string is a valid URL?
(62 answers)
Closed 8 years ago.
Currently I have an input box which will detect the URL and parse the data.
So right now, I am using:
var urlR = /^(?:([A-Za-z]+):)?(\/{0,3})([0-9.\-A-Za-z]+)
(?::(\d+))?(?:\/([^?#]*))?(?:\?([^#]*))?(?:#(.*))?$/;
var url= content.match(urlR);
The problem is, when I enter a URL like www.google.com, its not working. when I entered http://www.google.com, it is working.
I am not very fluent in regular expressions. Can anyone help me?
Regex if you want to ensure URL starts with HTTP/HTTPS:
https?:\/\/(www\.)?[-a-zA-Z0-9#:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()#:%_\+.~#?&//=]*)
If you do not require HTTP protocol:
[-a-zA-Z0-9#:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()#:%_\+.~#?&//=]*)
To try this out see http://regexr.com?37i6s, or for a version which is less restrictive http://regexr.com/3e6m0.
Example JavaScript implementation:
var expression = /[-a-zA-Z0-9#:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()#:%_\+.~#?&//=]*)?/gi;
var regex = new RegExp(expression);
var t = 'www.google.com';
if (t.match(regex)) {
alert("Successful match");
} else {
alert("No match");
}
(https?:\/\/(?:www\.|(?!www))[a-zA-Z0-9][a-zA-Z0-9-]+[a-zA-Z0-9]\.[^\s]{2,}|www\.[a-zA-Z0-9][a-zA-Z0-9-]+[a-zA-Z0-9]\.[^\s]{2,}|https?:\/\/(?:www\.|(?!www))[a-zA-Z0-9]+\.[^\s]{2,}|www\.[a-zA-Z0-9]+\.[^\s]{2,})
Will match the following cases
http://www.foufos.gr
https://www.foufos.gr
http://foufos.gr
http://www.foufos.gr/kino
http://werer.gr
www.foufos.gr
www.mp3.com
www.t.co
http://t.co
http://www.t.co
https://www.t.co
www.aa.com
http://aa.com
http://www.aa.com
https://www.aa.com
Will NOT match the following
www.foufos
www.foufos-.gr
www.-foufos.gr
foufos.gr
http://www.foufos
http://foufos
www.mp3#.com
var expression = /(https?:\/\/(?:www\.|(?!www))[a-zA-Z0-9][a-zA-Z0-9-]+[a-zA-Z0-9]\.[^\s]{2,}|www\.[a-zA-Z0-9][a-zA-Z0-9-]+[a-zA-Z0-9]\.[^\s]{2,}|https?:\/\/(?:www\.|(?!www))[a-zA-Z0-9]+\.[^\s]{2,}|www\.[a-zA-Z0-9]+\.[^\s]{2,})/gi;
var regex = new RegExp(expression);
var check = [
'http://www.foufos.gr',
'https://www.foufos.gr',
'http://foufos.gr',
'http://www.foufos.gr/kino',
'http://werer.gr',
'www.foufos.gr',
'www.mp3.com',
'www.t.co',
'http://t.co',
'http://www.t.co',
'https://www.t.co',
'www.aa.com',
'http://aa.com',
'http://www.aa.com',
'https://www.aa.com',
'www.foufos',
'www.foufos-.gr',
'www.-foufos.gr',
'foufos.gr',
'http://www.foufos',
'http://foufos',
'www.mp3#.com'
];
check.forEach(function(entry) {
if (entry.match(regex)) {
$("#output").append( "<div >Success: " + entry + "</div>" );
} else {
$("#output").append( "<div>Fail: " + entry + "</div>" );
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="output"></div>
Check it in rubular - NEW version
Check it in rubular - old version
These are the droids you're looking for. This is taken from validator.js which is the library you should really use to do this. But if you want to roll your own, who am I to stop you? If you want pure regex then you can just take out the length check. I think it's a good idea to test the length of the URL though if you really want to determine compliance with the spec.
function isURL(str) {
var urlRegex = '^(?!mailto:)(?:(?:http|https|ftp)://)(?:\\S+(?::\\S*)?#)?(?:(?:(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}(?:\\.(?:[0-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))|(?:(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)(?:\\.(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)*(?:\\.(?:[a-z\\u00a1-\\uffff]{2,})))|localhost)(?::\\d{2,5})?(?:(/|\\?|#)[^\\s]*)?$';
var url = new RegExp(urlRegex, 'i');
return str.length < 2083 && url.test(str);
}
Test:
function isURL(str) {
var urlRegex = '^(?!mailto:)(?:(?:http|https|ftp)://)(?:\\S+(?::\\S*)?#)?(?:(?:(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}(?:\\.(?:[0-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))|(?:(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)(?:\\.(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)*(?:\\.(?:[a-z\\u00a1-\\uffff]{2,})))|localhost)(?::\\d{2,5})?(?:(/|\\?|#)[^\\s]*)?$';
var url = new RegExp(urlRegex, 'i');
return str.length < 2083 && url.test(str);
}
var check = [
'http://www.foufos.gr',
'https://www.foufos.gr',
'http://foufos.gr',
'http://www.foufos.gr/kino',
'http://werer.gr',
'www.foufos.gr',
'www.mp3.com',
'www.t.co',
'http://t.co',
'http://www.t.co',
'https://www.t.co',
'www.aa.com',
'http://aa.com',
'http://www.aa.com',
'https://www.aa.com',
'www.foufos',
'www.foufos-.gr',
'www.-foufos.gr',
'foufos.gr',
'http://www.foufos',
'http://foufos',
'www.mp3#.com'
];
for (let index = 0; index < check.length; index++) {
var url=check[index]
if (isURL(check[index]))
console.log(`${url} ✔`);
else{
console.log(`${url} ❌`);
}
}
Result
Another possible solution, above solution failed for me in parsing query string params.
var regex = new RegExp("^(http[s]?:\\/\\/(www\\.)?|ftp:\\/\\/(www\\.)?|www\\.){1}([0-9A-Za-z-\\.#:%_\+~#=]+)+((\\.[a-zA-Z]{2,3})+)(/(.)*)?(\\?(.)*)?");
if(regex.test("http://google.com")){
alert("Successful match");
}else{
alert("No match");
}
In this solution please feel free to modify [-0-9A-Za-z\.#:%_\+~#=, to match the domain/sub domain name. In this solution query string parameters are also taken care.
If you are not using RegEx, then from the expression replace \\ by \.
Hope this helps.
Test:-
function IsUrl(url){
var regex = new RegExp("^(http[s]?:\\/\\/(www\\.)?|ftp:\\/\\/(www\\.)?|www\\.){1}([0-9A-Za-z-\\.#:%_\+~#=]+)+((\\.[a-zA-Z]{2,3})+)(/(.)*)?(\\?(.)*)?");
if(regex.test(url)){
console.log(`${url} ✔`);
}else{
console.log(`${url} ❌`);
}}
var check = [
'http://www.foufos.gr',
'https://www.foufos.gr',
'http://foufos.gr',
'http://www.foufos.gr/kino',
'http://werer.gr',
'www.foufos.gr',
'www.mp3.com',
'www.t.co',
'http://t.co',
'http://www.t.co',
'https://www.t.co',
'www.aa.com',
'http://aa.com',
'http://www.aa.com',
'https://www.aa.com',
'www.foufos',
'www.foufos-.gr',
'www.-foufos.gr',
'foufos.gr',
'http://www.foufos',
'http://foufos',
'www.mp3#.com'
];
for (let index = 0; index < check.length; index++) {
IsUrl(check[index])
}
Result
I was trying to put together some JavaScript to validate a domain name (ex. google.com) and if it validates enable a submit button. I thought that I would share my code for those who are looking to accomplish something similar. It expects a domain without any http:// or www. value. The script uses a stripped down regular expression from above for domain matching, which isn't strict about fake TLD.
http://jsfiddle.net/nMVDS/1/
$(function () {
$('#whitelist_add').keyup(function () {
if ($(this).val() == '') { //Check to see if there is any text entered
//If there is no text within the input, disable the button
$('.whitelistCheck').attr('disabled', 'disabled');
} else {
// Domain name regular expression
var regex = new RegExp("^([0-9A-Za-z-\\.#:%_\+~#=]+)+((\\.[a-zA-Z]{2,3})+)(/(.)*)?(\\?(.)*)?");
if (regex.test($(this).val())) {
// Domain looks OK
//alert("Successful match");
$('.whitelistCheck').removeAttr('disabled');
} else {
// Domain is NOT OK
//alert("No match");
$('.whitelistCheck').attr('disabled', 'disabled');
}
}
});
});
HTML FORM:
<form action="domain_management.php" method="get">
<input type="text" name="whitelist_add" id="whitelist_add" placeholder="domain.com">
<button type="submit" class="btn btn-success whitelistCheck" disabled='disabled'>Add to Whitelist</button>
</form>
I'd like users to enter a code and to assist them in transcribing it I'd hope to increase the spacing between every 3rd character they type. I've seen this nicely done for credit cards having 4 character spacing. This will be for an Ionic app so the simple input box coud be replaced with a customised Ionic control.
What methods have you used for this and what works best?
Open to Angular/Ionic code samples or a related web site tutorial.
Pure CSS would be nice.
Here is an other version, without jquery, works with alphanumerical and takes a configurable separator:
Typescript:
GROUP_SEPARATOR=" ";
......
format(valString) {
if (!valString) {
return '';
}
let val = valString.toString();
const parts = val.replace(/ /g, '');
return parts.replace(/\B(?=(?:\w{3})+(?!\w))/g, this.GROUP_SEPARATOR)
};
HTML
<input [(ngModel)]="input"
style="border:1px solid black" #myBudget="ngModel" (input)="input = format(input)">
DEMO
You can add space on keyup event.
Example
$('#input').on('keyup', function(e){
var val = $(this).val();
var newval = '';
val = val.replace(/\s/g, '');
for(var i=0; i < val.length; i++) {
if(i%3 == 0 && i > 0) newval = newval.concat(' ');
newval = newval.concat(val[i]);
}
$(this).val(newval);
})
I found a simpler method based on Vija's method ... Basically we match 3 non-space chars and we remove any previously added space chars. This is needed to allow the user to update or erase any chars in the text box.
A final solution may also need to adjust the position of the cursor based on where it was prior to performing the replace.
$('#input').on('keyup', function(e){
var val = $(this).val();
var newval = val.replace(/([^ ][^ ][^ ]) */g, "\$1 ").trim();
$(this).val(newval);
})
I am attempting to find a way so that when a user enters text into the data list, they can come across the same entry by course number (E.G. "CS 101") or course name (E.G. "Intro to Computer Science).
Currently, what I have is only searchable by the value field:
<datalist id="tagList">
<option value=""></option>
<option value="CSCI 4950">Senior Software Project</option>
<option value="CSCI 5117">Developing the Interactive Web</option>
<option value="CSCI 5421">Advanced Algorithms</option>
<option value="CSCI 5980">Design Methods for Comp. Sci.</option>
</datalist>
The solution needs to work in the Android Webkit web browser (Phonegap) -- Chrome seems to handle Datalists the same as Android's native browser so if it works in Chrome I should be ok.
It needs to display both the course name and course number to the user
This needs to be generalizable and not hard-coded as I am using AngularJS to actually populate the full list of courses.
What I've tried
https://stackoverflow.com/a/22827978/2831961 -- For some reason, this didn't work.
I've also tried a similar strategy, but with the data-value attribute. That didn't work either. Unless I am responsible for some behind the scenes Javascript work that I am unaware of.
http://jsfiddle.net/rh48cgrj/3/
Here's a fiddle. I put the option values/text into key:value pairs in a javascript object. NOTE: the key is an index number and the value is the option value attribute AND the text. This makes it easier to search them for our text.
var i = 0;
var selectItems = {}
$('#tagList option').each(function() {
var listvalue = $(this).val();
var listtext = $(this).text();
selectItems[i] = listvalue + " " + listtext + ",";
i++;
});
Then I split them into rows that included both value and text.
count = i;
for(i=0; i < count;i++) {
var blockoftext = blockoftext + " " + selectItems[i].toLowerCase() + ",";
}
I then setup a search function that would search those rows to see if any returned a match, and if they did the result was outputted to a div below the search box.
var texttosplit = blockoftext.split(",");
var searchresults;
for(i=0; i < texttosplit.length; i++) {
(texttosplit[i].indexOf(searchvalue.toLowerCase()) != -1) ?
(searchresults = texttosplit[i] + "<br>") : false;
$("#searched").html(searchresults);
}
There's an example for all of the above in the fiddle.
EDIT: The below is the commented code for the loop to check if search text is in the datalist per op request.
for (i = 0; i < texttosplit.length; i++) {
//The above loops through our array of class values and titles
(texttosplit[i].indexOf(searchvalue.toLowerCase()) != -1) ?
// The above determines if our search text is in class title using a ternary operator
// our array of class values and titles is lowercase so we make
//sure our search text is lowercase as well
// if we find a match between the search text and the class title/values perform the following:
(searchresults = texttosplit[i].replace(/\b[a-z]/g, function(letter) {
return letter.toUpperCase();
})
// The above replaces the first char of every word with an uppercase char
.replace("Csci", "CSCI") + "<br>",
// The above finds Csci and changes it to CSCI since all THOSE letters should be uppercase
prevtext = $("#searched").html(),
//get current text of element with id "searched" and place it in prevtext
$("#searched").html(prevtext + searchresults))
//append "searched" by adding it's current text with the new searchresults
:
//if search text is not in the class title return false
false;
}
I implemented an advance search with 15 input fields in AngularJS.
In the page load itself the result set is return from database in JSON format and i need to do the filter in client side only.
The input criteria's equivalent column is available in the result set and i need to check in its respective column only.
I am converting each column by JSON.stringify() and check with the search params like the below :
$scope.filteredData = $scope.actualData.filter(function(item) {
return JSON.stringify(item.FirstName).toLowerCase().indexOf(lowerFirstName) != -1 &&
JSON.stringify(item.LastName).toLowerCase().indexOf(lowerLastName) != -1 &&
JSON.stringify(item.EmailAddress).toLowerCase().indexOf(lowerEmailAddress) != -1 &&
JSON.stringify(item.Address1).toLowerCase().indexOf(lowerAddress1) != -1 &&
JSON.stringify(item.Address2).toLowerCase().indexOf(lowerAddress2) != -1;
...... etc // upto 15 fields
});
Since i have the 15 input fields and the actual result set contains a minimum of 50,000 records.
So converting each record's each column by JSON.stringify() and check with search params will surely cause the performance issue.
Is there any other way to achieve the filtering in client side with other approach.
I posted a sample code in Plunker with 5 input fields only : http://plnkr.co/edit/nUWZEbGvz7HG6gb91YZP
sylwester's answer is the normal way you'd filter things. Your code looks like you want to filter down to only the object that matches every input field. You code attempts to find an object where every property matches the searchParams object. At that point, I don't see what benefit there is to finding that object, because the user already created the object again! Nonetheless, here's a proper version of your code:
Live demo here.
<div ng-repeat="data in actualData | filter:searchData()">
$scope.searchData = function() {
return function(item) {
return Object.keys(item).every(function(key) {
// skip the $$hashKey property Angular adds to objects
if (key === '$$hashKey') { return true; }
var searchKey = key.charAt(0).toLowerCase()+key.slice(1);
return item[key].toLowerCase() === $scope.searchParams[searchKey].toLowerCase();
});
};
};
You really need to limit the data coming from the server for the browser's sake and for the server's sake. It's easy to implement a LIMIT, OFFSET system. It sounds like, overall, you just need to be able to query the server for a certain record.
From your comments, it seems you definitely want Angular's built in filter filter:searchParams, and just capitalize your searchParams models to match your data. For fun, I'll include more options for finer tuning.
This one almost mimics filter:searchParams. You can change > 1 to adjust when the partial matching kicks in, or have it return true only when both items are strictly equal === to disable partial matching. The difference here is that all items are hidden until matched, whereas filter:searchParams will show all items and then remove what doesn't match.
Live demo here.
$scope.searchData = function() {
return function(item) {
return Object.keys(item).some(function(key) {
if (key === '$$hashKey') { return false; }
var searchKey = key.charAt(0).toLowerCase()+key.slice(1);
var currentVal = $scope.searchParams[searchKey].toLowerCase();
var match = item[key].toLowerCase().match(currentVal);
return currentVal.length > 1 && match;
});
};
};
Lastly, to perfectly mimic filter:searchParams, you'd just put in a check to NOT filter the items until there is user input and the input is long enough to start the partial match.
Live demo here.
$scope.searchData = function() {
var partialMatchLength = 2;
return function(item) {
var shouldFilter = Object.keys($scope.searchParams).some(function(key) {
return $scope.searchParams[key] && $scope.searchParams[key].length >= partialMatchLength;
});
if (!shouldFilter) { return true; }
return Object.keys(item).some(function(key) {
if (key === '$$hashKey') { return false; }
var searchKey = key.charAt(0).toLowerCase()+key.slice(1);
var currentVal = $scope.searchParams[searchKey].toLowerCase();
var match = item[key].toLowerCase().match(currentVal);
return currentVal.length >= partialMatchLength && match;
});
};
};
First of all you ng-repeter with 50.000 records more likely is going to kill your browser, so you should thing about pagination.
Secondly you can easy filter your data using angular filter please see that demo
http://plnkr.co/edit/R8b8G4xCMSQmX1144UJG?p=preview
<div ng-controller="ListCtrl">
<br />
First Name:
<input type="text" id="txtFirstname" ng-model="searchParams.FirstName">
<br/>Last Name:
<input type="text" id="txtLastname" ng-model="searchParams.LastName">
<br/>Email Address:
<input type="text" id="txtEmailAddress" ng-model="searchParams.EmailAddress">
<br/>Address 1:
<input type="text" id="txtAddress1" ng-model="searchParams.Address1">
<br/>Address 2:
<input type="text" id="txtAddress2" ng-model="searchParams.Address2">
<br/>
<button class="btn btn-primary" ng-click="searchData()">Search</button>
<br />
<hr />
<b>Filtered Data(s):</b>
<div ng-repeat="data in actualData | filter:searchParams ">
<span ng-bind="data.FirstName"></span>
<span ng-bind="data.LastName"></span> |
Address : {{data.Address1}}
</div>
<hr />
</div>
That's a pretty long winded statement.
I'm building a faceted search which implements WebAPI in .Net and utilizes Knockout on the front end. My search response includes two lists of objects, the Resources (object with data for presentation) and Resource Facets (array of strings).
\"ResourceFacets\": [\r\n \"Book\",\r\n \"Video\",\r\n \"DVD\",\r\n \"eBook\",\r\n \"Audio\"\r\n ]\r\n}"
My ViewModel contains both the facets and the resources along with a presentation object to handle a custom row count:
function ViewModel() {
this.facets = ko.observableArray(results.ResourceFacets);
this.resources = ko.observableArray(results.ResourceResults);
this.resourceRows = ko.computed(function() {
var rows = [],
rowIndex = 0,
itemsPerRow = 2;
var resourceList = this.resources();
for (var index = 0; index < resourceList.length; index++) {
if (!rows[rowIndex]) {
rows[rowIndex] = [];
}
rows[rowIndex].push(resourceList[index]);
if (rows[rowIndex].length == itemsPerRow) {
rowIndex++;
}
}
return rows;
});
};
This allowed me to create a dynamic list of checkboxes to handle the facets and also display the resource results. What I'm trying to do now is add a Select All checkbox which will, by default, select all the boxes. From other examples I've seen, my understanding is that I need an observable property, something like "Selected", on that ResourceFacet. I just feel like that is too much that the API needs to know about my presentation.
So my question is how can I avoid having to add a "selected" bool value to the ResourceFacets but still be able to select all checkboxes or deselect the "All" checkbox when a user deselects a facet?
You can keep the list of booleans necessary to track the selection on a separate member of your view model, in addition to facets and resources. Just create a new observableArray of booleans of the same size of facets and bind those values to the checkboxes.
Another solution is to create the objects necessary to bind the checkboxes on the fly, based on results.ResourceFacets, keeping your API clean. For example:
var realModel = [];
for (var i = 0; i < results.ResourceFacets; i++) {
realModel.push({ name: results.ResourceFacets[i], chkBoxVal: ko.observable(false) });
}
this.facets = ko.observableArray(realModel);