FAQ Database Discussion Community


Don't allow user to submit a form with empty fields in ruby on rails

ruby-on-rails,ruby,forms,browser
I am starting use Ruby on Rails and I am having a little problem. I have a form with 3 fields, this is the code: <%= form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f| %> <%= devise_error_messages! %> <div class="field"> <%= f.text_field :name, autofocus: true, placeholder: "Name" %> </div> <div class="field">...

Open popup window in specific keyboard language

javascript,jquery,html,browser
I have code like this that open new window in javascript: window.open(URL); But although browser keyboard language at opennig moment for example is 'fa' but new window opens in 'en'. Is there a way that I can open new window in the same keyboard language that browser uses? Thanks....

How can I add custom search engine to browser?

search,browser,manifest,provider
Basically what I'm trying to do is to be able to add my own "search engine" (based on PHP and Mod_rewrite) to any browser automatically. Somewhere on the Internet I found that I need to declare a search provider. How can I do this? <link>, manifest or some JavaScript?

How is it possible that browserify can make server code run in the browser when servers need access to things like sockets?

javascript,node.js,browser,browserify
Am I simply ignorant of the features that some browsers offer or does this library use some strange workaround to implement these features?

Why/how does the browser decide ☃.net goes to xn--n3h.net

url,browser,unicode,character-encoding,iri
If we type into firefox or chrome http://☃.net/ It takes us to http://xn--n3h.net/ Which is a mirror of unicodesnowmanforyou.com What I don't understand is by what rules the unicode snowman can decode to xn--n3h, it doesn't look anything like utf-8 or urlencoding. I think I found a hint while mucking...

file_get_contents() function loads different page compared to broswer

php,html,file,browser,hyperlink
I am trying to find next page's link of a particular page(i call that particular page as current page here).The current page in program i am using is http://en.wikipedia.org/wiki/Category:1980_births The next page link which i am extracting from the current page is the below one http://en.wikipedia.org/w/index.php?title=Category:1980_births&pagefrom=Alexis%2C+Toya%0AToya+Alexis#mw-pages But ,, when file_get_contents()...

Why window or document can't be set to undefined or null?

javascript,browser
This might be a silly question but I haven't found an answer to it. Why can't we do the following? window = undefined OR document = undefined I know those are globals and are available in browsers but thinking of how JavaScript works, is it not possible? Are those re-evaluated...

How To Open A Website's (Built on Wordpress) PHP file in my browser?

php,wordpress,browser
I came across a website and liked its look. So, I wanted to know how its style.css is coded. I got there style.css file by visiting to Network Tab of Inspect Element and then opening that file in a new tab. We can open JS files also in the same...

Does {} consume less memory than [] for nested objects in Javascript?

javascript,browser,requirejs
I had some legacy JS code that creates a giant nested object structure with []. The code goes some like this var data = []; data ["first"] = []; data ["first"]["second"] = []; data ["first"]["second2"] = "hello"; It is about 250+ KB of javascript, which is fairly large. When I...

How often is garbage collected?

javascript,browser,garbage-collection
If I understand correctly the GC works like this: MyClass.prototype.render = function(){ var largeArray = []; for (var i = 0; i < 1000; i++) { largeArray.push({ firstName: 'John', lastName: 'Smith' }); } } When render() is called, largeArray is marked for garbage collection but not immediately collected. I am...

How can I have a different behavior in this JQuery script if the browser is Chrome?

javascript,jquery,html,css,browser
I am absolutely new in JavaScript and JQuery and I have the following problem. I have to modify a JQuery script so that it has a different behavior when the browser is Chrome. This is my script: $(document).ready(function () { $("thead.opening").click(function () { alert("INTO second function"); $(this).next().css('width', '10000000 em'); alert(modified);...

Detect browser close event

javascript,browser,cross-browser,onbeforeunload
I want to capture the browser window/tab close event. I have tried the following But not working: <script type="text/javascript"> window.onbeforeunload = function(){ myUnloadEvent(); } function myUnloadEvent() { alert ('Calling some alert messages here'); } </script> <body> Body of the page goes here. </body> Tried these links also but no more...

close and open browser -selenium C# Visual studio

c#,selenium,browser,close
I want to close and then open the browser without close the driver of selenium, using C# I don't want to: driver.Quit(); How Can I close and the open again the browser Chrome?...

Will Microsoft Edge support userscripts?

javascript,browser,userscripts,microsoft-edge
Did Microsoft announce whether Edge will support userscripts? Doesn't matter if via plugins (similar to Greasemonkey in Firefox or Tampermonkey in Chrome) or as an out-of-the-box feature.

How to prevent iFrame actions from causing outer page to scroll to it

javascript,iframe,browser,scroll
First, I know there are many questions about this phenomenon but none of the workarounds given so far would help in the situation I have here. Environment: My code is in the Outer iFrame inside a page I don't control. It's sized to fit all my content so no scrolling...

How to make a browser console wait in a javascript

javascript,browser,console,wait
I'm trying to make a script that clicks on a page button, waits X seconds (for the result of the click to take place), and then continues. How can I do that? (only the wait part)...

Why is it so hard to style